TJI 110, 210, 230, 360, And 560 Joist Specifier's Guide TJ 4000 Ijoist

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FLOOR SOLUTIONS

ROOF SOLUTIONS

TRUS JOIST
TJI 110 TJI 210
TJI 230 TJI 360
TJI 560 JOISTS
®

®

®

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®

®

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®

Featuring Silent Floor® Joists for
Residential Applications
■

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#TJ-4000 SPECIFIER’S GUIDE

www.iLevel.com
1.888.iLevel8 (1.888.453.8358)

Uniform and Predictable
 ightweight for Fast
L
Installation
Resource Efficient
 esists Bowing, Twisting,
R
and Shrinking

■

Significantly Reduces Callbacks

■

Available in Long Lengths

■

Limited Product Warranty

All In One™

WELCOME TO iLEVEL

iLevel is an exciting new brand and business within
Weyerhaeuser. iLevel brings the most innovative and
trusted products for residential construction together
under one roof. Within iLevel, you’ll still find all the
reliable, brand-name building products that you’ve been
using—Trus Joist® engineered wood products and
design software, Structurwood® engineered panels,
Performance Tested™ lumber, and more. But with
iLevel, you’ll work with only one service-oriented
supplier to get all of these products and the
support you need to build smarter.
iLevel. A family of brand-name building products…
a source for innovative ideas and solutions…
a supplier that’s simpler to do business with.
TJI® Joists Revolutionized the Way You Build Floors
Trus Joist® developed wooden I-joists nearly 40 years ago, and
since then we’ve continually improved their quality and made them
easier to work with. Engineered to provide strength and consistency,
iLevel® Trus Joist® TJI® joists are a key part of our Silent Floor®
System.
TABLE OF CONTENTS
Design Properties
Material Weights
Floor Span Tables
Floor Load Tables
PSF to PLF Conversion Table
Floor Performance
TJ-Pro™ Rated Floor System
Silent Floor® Joist Framing
Floor Details
Fastener Spacing and
Diaphragm Design
Rim Board Selection
and Installation
Allowable Holes
Cantilevers
Fire-Safe Construction
Understanding and
Preventing Floor Noise
Roof Span Table
Roof Span Notes and
Cut Length Calculation
Roof Framing
Roof Details
Roof Load Tables
Framing Connectors

2

3
3
4
5
5
6
7
8
9
9

Here’s Why so Many Specifiers and Builders Choose
Silent Floor® Joists:
Silent Floor® joists continue to set the standard for residential floor
and roof joists. Their strength and long lengths give you the freedom
to design the open, spacious floor plans that your customers want.
Engineered for dimensional stability and predictable performance,
Silent Floor® joists resist warping, twisting, and shrinking.
The precision engineering that makes Silent Floor® joists strong also

10
11
12–13
14

makes them easier to install. Silent Floor® joists are designed for

15
16–17

joists come with precut knockout holes, and additional holes for

17
18
19–20
21
22–23

easy handling and fast installation. They are lightweight, easy to cut,
and can be installed using standard construction tools. Silent Floor®
ductwork can be cut at the job site. These same features also make
them a popular choice for roof joists.

iLevel Trus Joist® TJI® Joist Specifier’s Guide TJ-4000

February 2008

Design properties and material weights
ABOUT THIS GUIDE
The applications provided in this guide are readily available through our n
­ ationwide n
­ etwork of distributors
and dealers and are ­intended for use in single-family dwellings only.
For information on using these products in multi-family dwellings, contact your iLevel representative.
For commercial applications such as retail stores, office buildings, schools, restaurants, hotels,
and nursing homes, please refer to the iLevel Trus Joist® Commercial TJI® L65, L90, H90, HS90 Joists
Specifier’s Guide (Reorder #COM-2000). Commercial products are typically designed,
­manufactured, and sold for each specific job.
For more information on any iLevel® product, please call 1-888-453-8358.

Design Properties (100% Load Duration)
Depth

91⁄ 2 "

117⁄8"

14"

16"

TJI®

Joist
Weight
(lbs/ft)

110
210
230
110
210
230
360
560
110
210
230
360
560
210
230
360
560

2.3
2.6
2.7
2.5
2.8
3.0
3.0
4.0
2.8
3.1
3.3
3.3
4.2
3.3
3.5
3.5
4.5

Basic Properties
Maximum
Joist Only
Resistive
El x 10 6
Moment (1)
(in. 2-lbs)
(ft-lbs)
2,380
2,860
3,175
3,015
3,620
4,015
6,180
9,500
3,565
4,280
4,755
7,335
11,275
4,895
5,440
8,405
12,925

140
167
183
238
283
310
419
636
351
415
454
612
926
566
618
830
1,252

Maximum
Vertical
Shear
(lbs)
1,220
1,330
1,330
1,560
1,655
1,655
1,705
2,050
1,860
1,945
1,945
1,955
2,390
2,190
2,190
2,190
2,710

Material Weights
Reaction Properties
31⁄ 2" Intermediate
13 ⁄4"
Reaction (lbs)
End
Reaction
No Web
With Web
(lbs)
­S tiffeners Stiffeners
885
1,935
N.A.
980
2,145
N.A.
1,035
2,410
N.A.
885
1,935
2,295
980
2,145
2,505
1,035
2,410
2,765
1,080
2,460
2,815
1,265
3,000
3,475
885
1,935
2,295
980
2,145
2,505
1,035
2,410
2,765
1,080
2,460
2,815
1,265
3,000
3,475
980
2,145
2,505
1,035
2,410
2,765
1,080
2,460
2,815
1,265
3,000
3,475

(1) Caution: Do not increase joist moment design properties by a repetitive member use factor.

(Include TJI® weights in dead load ­calculations—
see Design Properties table at left for joist weights)

Floor Panels
Southern Pine
1 ⁄ 2"

plywood. .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  . 1.7

5 ⁄ 8"

plywood. .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  . 2.0 psf

3 ⁄4"

plywood. .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  . 2.5 psf

11 ⁄8" plywood. .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  . 3.8 psf
1 ⁄ 2"

OSB. .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  . 1.8 psf

5 ⁄ 8"

OSB. .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  . 2.2 psf

3 ⁄4"

OSB. .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  . 2.7 psf

7⁄ 8"

OSB. .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  . 3.1 psf

11 ⁄8" OSB. .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  . 4.1 psf
Based on: Southern pine – 40 pcf for ­plywood, 44 pcf for OSB

Roofing
Asphalt shingles . .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  . 2.5 psf
Wood shingles. .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  . 2.0 psf
Clay tile. .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  . 9.0 to 14.0 psf
Slate (3 ⁄8" thick). .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  . 15.0 psf
Roll or Batt Insulation (1" thick):

TJI ® joists are intended
for dry-use applications

Rock wool. .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  . 0.2 psf
Glass wool. .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  . 0.1 psf

Floor Finishes
Hardwood (nominal 1") . .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  . 4.0 psf

General Notes
■

■

	Design reaction includes all loads on the joist. Design shear is com­puted at the inside face of supports
and includes all loads on the span(s). Allowable shear may sometimes be increased at interior supports in
accordance with ICC ES ESR-1153, and these increases are reflected in span tables.
The following formulas approximate the uniform load deflection of Δ (inches):
For
TJI® 110, 210, 230, and 360 Joists
4
2
Δ = 22.5 wL + 2.67 wL5
El
d x 10

w
L
d
El

=
=
=
=

For
TJI® 560 Joists
4
2
Δ = 22.5 wL + 2.29 wL5
El
d x 10

uniform load in pounds per linear foot
span in feet
out-to-out depth of the joist in inches
value from table above

Sheet vinyl. .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  . 0.5 psf
Carpet and pad. .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  . 1.0 psf
3 ⁄4"

ceramic or quarry tile. .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  . 10.0 psf

Concrete:
Regular (1"). .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  . 12.0 psf
Lightweight (1"). .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  . 8.0 to 10.0 psf
Gypsum concrete (3 ⁄4"). .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  . 6.5 psf

Ceilings
Acoustical fiber tile. .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  . 1.0 psf
1 ⁄ 2"

gypsum board. .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  . 2.2 psf

5 ⁄ 8"

gypsum board. .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  . 2.8 psf

Plaster (1" thick). .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  . 8.0 psf

Code Evaluations: See ICC ES ESR-1153 and ICC ES ESR-1387

iLevel Trus Joist® TJI® Joist Specifier’s Guide TJ-4000

February 2008

3

Floor Span Tables
Not all products are available in
all markets. Contact your iLevel
­representative for information.

L/480 Live Load Deflection
Depth
91⁄ 2"

13⁄4"
11/4"–13⁄8"
3⁄8"

117⁄ 8"
91⁄2"
117⁄8"
14"
14"

TJI® 110 Joists
16"

21⁄16"

91⁄2"
117⁄8"
14"
16"

Depth
91⁄ 2"

TJI® 210 Joists

117⁄ 8"

25⁄16"
14"

11/4"–13⁄8"
91⁄2"

3⁄8"

117⁄8"
14"
16"

TJI® 230 Joists

16"

25⁄16"

110
210
230
360
560

13⁄8"
117⁄8"
14"
16"

TJI® 360 Joists
31⁄2"

TJI ®
110
210
230
110
210
230
360
560
110
210
230
360
560
210
230
360
560

40 PSF Live Load / 10 PSF Dead Load
12" o.c.
16" o.c.
19.2" o.c.
24" o.c.
18'-2"
16'-7"
15'-3"
13'-8"
19'-1"
17'-5"
16'-6"
15'-0"
19'-7"
17'-11"
16'-11"
15'-9"
21'-7"
18'-11"
17'-3"
15'-5"(1)
22'-8"
20'-8"
18'-11"
16'-10"
23'-3"
21'-3"
19'-11"
17'-9"
25'-4"
23'-2"
21'-10"
20'-4"(1)
28'-10"
26'-3"
24'-9"
23'-0"
23'-9"
20'-6"
18'-9"
16'-9"(1)
25'-8"
22'-6"
20'-7"
18'-4"(1)
26'-4"
23'-9"
21'-8"
19'-4"(1)
28'-9"
26'-3"
24'-9"(1)
21'-5"(1)
32'-8"
29'-9"
28'-0"
25'-2"(1)
19'-5"(1)
27'-10"
24'-1"
22'-0"(1)
29'-2"
25'-5"
23'-2"
20'-7"(1)
31'-10"
29'-0"
26'-10"(1)
21'-5"(1)
36'-1"
32'-11"
31'-0"(1)
25'-2"(1)

40 PSF Live Load / 10 PSF Dead Load
12" o.c.
16" o.c.
19.2" o.c.
24" o.c.
N.A.
N.A.
N.A.
15'-4"
N.A.
N.A.
21'-4"
17'-0"
N.A.
N.A.
N.A.
19'-2"
N.A.
N.A.
24'-5"
19'-6"
N.A.
N.A.
29'-10"
23'-10"

117⁄8"
14"
16"

TJI® 560 Joists
4

40 PSF Live Load / 20 PSF Dead Load
12" o.c.
16" o.c.
19.2" o.c.
24" o.c.
17'-8"
15'-3"
13'-11"
12'-5"
19'-1"
16'-9"
15'-4"
13'-8"
19'-7"
17'-8"
16'-1"
14'-5"
19'-11"
17'-3"
15'-8"
14'-0"(1)
21'-10"
18'-11"
17'-3"
15'-5"(1)
23'-0"
19'-11"
18'-2"
16'-3"(1)
25'-4"
23'-2"
21'-10" (1)
17'-10"(1)
28'-10"
26'-3"
24'-9"
20'-11"(1)
21'-8"
18'-9"
17'-1"(1)
14'-7"(1)
23'-9"
20'-7"
18'-9"(1)
16'-2"(1)
25'-0"
21'-8"
19'-9"
17'-1"(1)
28'-9"
26'-3" (1)
22'-4"(1)
17'-10"(1)
32'-8"
29'-9"
26'-3" (1)
20'-11"(1)
25'-5"
22'-0"(1)
20'-1"(1)
16'-2"(1)
26'-9"
23'-2"
21'-2"(1)
17'-1"(1)
31'-10"
26'-10" (1)
22'-4"(1)
17'-10"(1)
36'-1"
31'-6" (1)
26'-3"(1)
20'-11"(1)

40 PSF Live Load / 20 PSF Dead Load
12" o.c.
16" o.c.
19.2" o.c.
24" o.c.
N.A.
N.A.
16'-0"
12'-9"
N.A.
21'-4"
17'-9"
14'-2"
N.A.
N.A.
19'-11"
15'-11"
N.A.
24'-5"
20'-4"
16'-3"
N.A.
29'-10"
24'-10"
19'-10"

 	Long-term deflection under dead load, which includes the effect of creep, has not been considered. Bold italic spans reflect initial dead
load deflection exceeding 0.33".

■

How to Use These Tables

General Notes

1.	Determine the appropriate live load deflection
­criteria.

Tables are based on:
		 – Uniform loads.
		 – More restrictive of simple or continuous span.
		 –	Clear distance between supports (13⁄4" minimum end
bearing).

2.	Identify the live and dead load condition.
3.	 Select on-center spacing.

13⁄8"
7⁄16"

40 PSF Live Load / 20 PSF Dead Load
12" o.c.
16" o.c.
19.2" o.c.
24" o.c.
16'-5"
15'-0"
13'-11"
12'-5"
17'-3"
15'-9"
14'-10"
13'-8"
17'-8"
16'-2"
15'-3"
14'-2"
19'-6"
17'-3"
15'-8"
14'-0"(1)
20'-6"
18'-8"
17'-3"
15'-5"(1)
21'-0"
19'-2"
18'-1"
16'-3"(1)
22'-11"
20'-11"
19'-8"
17'-10"(1)
26'-1"
23'-8"
22'-4"
20'-9"(1)
21'-8"
18'-9"
17'-1"(1)
14'-7"(1)
23'-3"
20'-7"
18'-9"(1)
16'-2"(1)
23'-10"
21'-8"
19'-9"
17'-1"(1)
26'-0"
23'-8"
22'-4"(1)
17'-10"(1)
29'-6"
26'-10"
25'-4"(1)
20'-11"(1)
25'-5"
22'-0"(1)
20'-1"(1)
16'-2"(1)
26'-5"
23'-2"
21'-2"(1)
17'-1"(1)
28'-9"
26'-3"(1)
22'-4"(1)
17'-10"(1)
32'-8"
29'-8"
26'-3"(1)
20'-11"(1)

(1) Web stiffeners are required at intermediate supports of continuous-span joists when the intermediate bearing length is less than 51⁄4"
and the span on either side of the intermediate bearing is greater than the following spans:

TJI ®

3⁄8"

110
210
230
110
210
230
360
560
110
210
230
360
560
210
230
360
560

40 PSF Live Load / 10 PSF Dead Load
12" o.c.
16" o.c.
19.2" o.c.
24" o.c.
16'-5"
15'-0"
14'-2"
13'-2"
17'-3"
15'-9"
14'-10"
13'-10"
17'-8"
16'-2"
15'-3"
14'-2"
19'-6"
17'-10"
16'-10"
15'-5"(1)
20'-6"
18'-8"
17'-8"
16'-5"
21'-0"
19'-2"
18'-1"
16'-10"
22'-11"
20'-11"
19'-8"
18'-4"
26'-1"
23'-8"
22'-4"
20'-9"
22'-2"
20'-3"
18'-9"
16'-9"(1)
23'-3"
21'-3"
20'-0"
18'-4"(1)
23'-10"
21'-9"
20'-6"
19'-1"
26'-0"
23'-8"
22'-4"
20'-9"(1)
29'-6"
26'-10"
25'-4"
23'-6"
19'-5"(1)
25'-9"
23'-6"
22'-0"(1)
26'-5"
24'-1"
22'-9"
20'-7"(1)
28'-9"
26'-3"
24'-8"(1)
21'-5"(1)
32'-8"
29'-8"
28'-0"
25'-2"(1)

L/360 Live Load Deflection (Minimum Criteria per Code)

11/4"–13⁄8"
3⁄8"

TJI ®

4.	Scan down the column until you meet or
exceed the span of your ­application.

■

5.	Select TJI® joist and depth.
■

Live load deflection is not the only factor
that affects how a floor will perform.
To more ­accurately predict floor performance,
use our TJ-Pro™ Ratings.

A ssumed composite action with a single layer of 24" on-center
span-rated, glue-nailed floor panels for deflection only. Spans
shall be reduced 6" when floor panels are nailed only.

■

■

	Spans generated from iLevel® software may exceed the spans
shown in these tables because software reflects actual design
conditions.
	For loading conditions not shown, refer to software or to the load
table on page 5.

iLevel Trus Joist® TJI® Joist Specifier’s Guide TJ-4000

February 2008

floor load table
Floor—100% (PLF)
8'
Depth

91⁄ 2"

117⁄ 8"

14"

16"

TJI ®

Live
Load
L /480

110
210
230
110
210
230
360
560
110
210
230
360
560
210
230
360
560

*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*

10'
Total
Load

Live
Load
L /480

190
210
236
190
210
236
241
294
190
210
236
241
294
210
236
241
294

127
147
159
*
*
*
*
*
*
*
*
*
*
*
*
*
*

12'

14'

Total
Load

Live
Load
L /480

Total
Load

Live
Load
L /480

152
169
190
152
169
190
193
236
152
169
190
193
236
169
190
193
236

77
90
98
*
*
*
*
*
*
*
*
*
*
*
*
*
*

127
141
158
127
141
158
162
197
127
141
158
162
197
141
158
162
197

50
59
64
83
97
105
136
*
*
*
*
*
*
*
*
*
*

Joist Clear Span
16'
18'
Live
Live
Total Load Total Load Total
Load L /480 Load L /480 Load
95
114
126
109
121
136
139
169
109
121
136
139
169
121
136
139
169

40
44
57
67
73
95
138
83
96
104
*
*
*
*
*
*

81
88
92
106
119
121
148
95
106
119
121
148
106
119
121
148

48
52
69
101
59
69
75
98
*
93
100
*
*

87
97
108
132
85
94
106
108
132
94
106
108
132

20'
Live
Load Total
L /480 Load

22'
Live
Load Total
L /480 Load

39
51
76

78
97
119

39
58

78
108

51
56
73
107
69
75
*
*

84
93
97
119
85
95
97
119

43
56
83
53
57
75
*

77
88
108
77
87
88
108

24'
Live
Load Total
L/480 Load

45

91

44
65

81
99

59
86

81
99

* Indicates that Total Load value controls.

How to Use This Table

General Notes

1.	Calculate actual total and live load in pounds per linear foot (plf).

Table is based on:
		 – Uniform loads.
		 – No composite action provided by sheathing.
		 – More restrictive of simple or continuous span.
■

2.	Select appropriate Joist Clear Span.
3.	Scan down the column to find a TJI® joist that meets or exceeds actual total and
live loads.

■

	Total Load limits joist deflection to L /240.

■

	Live Load is based on joist deflection of L /480.

■

	If a live load deflection limit of L /360 is desired, multiply value in Live Load
column by 1.33. The resulting live load shall not exceed the Total Load shown.

PSF to PLF Conversions
O.C.
Spacing

20

25

12"
16"
19.2"
24"

20
27
32
40

25
34
40
50

Load in Pounds Per Square Foot (PSF)
30
35
40
45
50
Load in Pounds Per Linear Foot (PLF)
30
35
40
45
50
40
47
54
60
67
48
56
64
72
80
60
70
80
90
100

55

60

55
74
88
110

60
80
96
120

WARNING
DO NOT walk on joists until braced.
INJURY MAY RESULT.

Joists are
unstable
until braced
­laterally
Bracing Includes:
Blocking
Hangers
Rim Board
Sheathing
Rim Joist
Strut Lines
■

DO NOT stack building materials on unsheathed
joists. Stack only over beams or walls.

■

WARNING NOTES:

Lack of proper bracing during construction can result
in serious accidents. Observe the following guidelines:

1.	All blocking, hangers, rim boards, and rim joists at the end supports of the TJI®
joists must be c­ ompletely installed and properly nailed.
2.	Lateral strength, like a braced end wall or an existing deck, must be established at
the ends of the bay. This can also be accomplished by a temporary or permanent
deck (sheathing) fastened to the first 4 feet of joists at the end of the bay.
3.	Safety bracing of 1x4 (­ minimum) must be nailed to a braced end wall or sheathed
area (as in note 2) and to each joist. Without this bracing, buckling sideways or
rollover is highly probable under light c­ onstruction loads—such as a worker or one
layer of unnailed sheathing.

■

■

4.	Sheathing must be completely attached to each TJI® joist before additional loads
can be placed on the system.

■

■

DO NOT walk on joists that are lying flat.

5.	Ends of cantilevers require safety bracing on both the top and b­ ottom flanges.
6.	The flanges must remain straight within a tolerance of 1⁄2" from true alignment.

iLevel Trus Joist® TJI® Joist Specifier’s Guide TJ-4000

February 2008

5

Floor performance and tj-pro™ ratings
It’s About Choice—
iLevel® Trus Joist® TJ-Pro™ Ratings are generated by a sophisticated computer model
designed to predict floor performance and evaluate the relationship between the
cost and the “feel” of any given floor system. The methodology is based on extensive
­laboratory research, more than one million installations, and the combined expertise of
some of the best engineers in the field. TJ-Pro™ Ratings go beyond deflection c
­ riteria
to consider job-specific needs and expectations. In many cases, using TJ‑Pro™ Ratings
will offer ­a system that improves ­performance while actually reducing costs!
TJ-Pro™ Rating Advantages
■

■

■

■

Perceived Floor Performance


Works
as part of iLevel® Trus Joist®
TJ-Beam® and TJ-Xpert® software

Customer Satisfaction

84%

 rovides a new method for accurately
P
­predicting floor ­performance

96% 99.9%

63%

 akes perceptions of the homeowner
T
into account

28%

Provides cost comparison
Good

Better

How do most people
perceive a floor assembly
with a TJ-Pro™ Rating of
45 points? 84% find it
good to excellent and
16% find it marginal to
unacceptable.

Excellent

TJ-Pro™ Rating Points

Design Smarter—Don’t Over-Specify
T he traditional way to specify a floor system is to use live load d­ eflection criteria, but deflection
explains only part of how a floor performs. Depending on factors unique to the structure and its use, the
code minimum of L/360 (or even the more ­restrictive limits of L/480) may disappoint many customers.
TJ-Pro™ Ratings are a much better predictor of floor performance
because they consider the many factors that affect floor performance,
even ­taking into account the perceptions of the homeowner. With so
many variables, you can deliver an economical solution tailored to your
customer’s ­expectations.
Factors That Affect Floor Performance
■

	TJI® joist series, depth, and spacing

■

	Deck thickness and quality

■

	Directly applied ceilings

■

	Location of partitions on floor

■

	Blocking

■

	Bearing conditions for the TJI® joists

Get the Support You Need—
We’re here to help you make the most of TJ-Pro™ Ratings, whether it’s help with
setup, tips and tricks, or selecting the best rating for your project. Call your iLevel
representative today.

6

iLevel Trus Joist® TJI® Joist Specifier’s Guide TJ-4000

February 2008

The iLevel® TJ-Pro™ Rated Floor System—
The Premium Floor System From iLevel
Design Your Floors to Suit
Each Customer

Fewer Callbacks and
More Referrals

With TJ-Pro™ Ratings and iLevel’s proprietary
­ aterials, we can accurately predict what it will
m
take to build a floor that satisfies even your most
demanding customer. And you’ll get the right balance
of cost and ­performance in every system.

Satisfied customers mean more ­referrals. And the
iLevel® TJ-Pro™ Rated Floor System is the best way to
make sure that there’s less to complain about. It takes
the guesswork out of how to build a floor that
will make your customers happy.

You’ll Like the Way it Builds.
Your Customers Will Love the Way it Feels.

Now You Can Build a Strong and ­Stable Floor—Without Overbuilding.
The performance of most commodity building
products is unpredictable. But since we know the
precise strength of every component in the iLevel®
TJ-Pro™ Rated Floor System, we can comfortably
build to your specifications while making sure that
you don’t use more material than you need.

TimberStrand® LSL rim board; TimberStrand® LSL,
Parallam® PSL, and Microllam® LVL beams and
­columns; and our helpful ­installation guidelines
give you more ­control, more strength, and more
reliability than you could get with a package
made up of ­typical framing materials.

Silent Floor® joists have very specific performance
­characteristics. Structurwood Edge Gold® panels
are made with a proprietary formula, meet precise
thickness tolerances, and have a top-quality edge
seal—making them more stable and consistent
than other structural panels. iLevel® Trus Joist®

So next time you’re building someone’s dream
home, don’t rely on guesswork. Bring your plans
to any iLevel location and we’ll show you how to
make the most of both your framing material and
the labor it takes to turn it into a home.

For projects that demand quality, performance, and customer satisfaction, upgrade to the iLevel® TJ-Pro™ Rated Floor System.
Contact your iLevel representative or call 1-888-453-8358 for more information.

silent floor® joist framing
Joists must be laterally supported at cantilever
and end bearings by blocking panels, hangers, or
direct attachment to a rim board or rim joist

Silent Floor® joist framing does not require
bridging or mid-span blocking

Rim board joint between joists

11⁄4" TimberStrand® LSL or
iLevel® 11⁄8" rim board

Safety bracing (1x4 ­minimum) placed at
8' on-center ­(6' on-center for TJI® 110
joists) and extended to a braced end
wall. Fasten at each joist with two
8d (0.113 x 21⁄2") nails minimum.
Structural sheathing
Protect untreated wood
from direct contact
with ­concrete

See Exterior Deck
Attachment on
page 10

11⁄2" knockouts
at approximately
12" on-center

See Allowable Holes
on page 11

WARNING
Joists are unstable until
laterally braced.
See Warning Notes on page 5.

TJI® Joist Nailing Requirements at Bearing
TJI® Joist to Bearing Plate

Squash Blocks to TJI® Joist
(Load bearing wall above)

11⁄4" TimberStrand® LSL or
iLevel® 11⁄8" rim board

Web Stiffener Attachment

One 10d (0.128" x 3")
nail into each flange

Gap:
1⁄8" minimum
23⁄4" maximum
Three 8d (0.113" x 21⁄2") nails,
clinched
Web stiffener(1) each side
TJI® 110 joists:
5⁄8" x 25⁄16" minimum
TJI® 210 joists:
3⁄4" x 25⁄16" minimum
TJI® 230 and 360 joists:
7⁄8" x 25⁄16" minimum
Tight

1"

One 8d (0.113" x 21⁄2")
nail each side. Drive
nails at an angle at
least 11⁄2" from end.
1"
13⁄4" minimum ­bearing
at end support; 31⁄2" minimum
at ­intermediate support
Shear transfer: Connections equivalent to floor panel
­nailing schedule

Also see detail B2
on page 9

TJI® 560 Joists Only

Rim to TJI® Joist

13⁄4" minimum
bearing

8

11⁄4" TimberStrand® LSL rim board,
iLevel® 11⁄8" rim board, or
TJI® 110 rim joist:
TJI® 560 rim joist:
One 10d (0.128" x 3") nail
Toenail with
into each flange
10d (0.128" x 3")
nails, one each side
TJI® 210, 230, and 360
of TJI® joist flange
rim joist:
One 16d (0.135" x 31⁄2") nail
into each flange
Top View

11⁄2"

TJI® 560
floor joist

Gap:
1⁄8" minimum
23⁄4" maximum
Three 16d (0.135"
x 31⁄2") nails

11⁄2"

2x4 web
­stiffener(2)
Tight

TJI® 560
rim joist

Locate rim board joint between joists
iLevel Trus Joist® TJI® Joist Specifier’s Guide TJ-4000

W

(1) PS1 or PS2 sheathing, face grain vertical
(2) Construction grade or better

February 2008

floor details
Intermediate Bearing –
No Load Bearing Wall Above

Load bearing wall above
(must stack over wall below)

Load bearing or shear wall above
(must stack over wall below)

2x4 minimum
squash blocks

Blocking
panel

1⁄16"

Web stiffeners required
each side at B1W

B1

B1
W

Web stiffeners required
each side at B3W

Web stiffeners required
each side at B2W

IRC 502.7 requires lateral restraint
(blocking) at all intermediate supports
in Seismic Design Categories D0, D1, and
D2 to strengthen the floor diaphragm

B2

Blocking panels may be required
B2 with shear walls above or below—
W see detail B1

B3

Flush bearing plate required.
Maximum 1 ⁄4" overhang­
­permitted at beam.

Blocking panels may be required
with shear walls above or b­ elow—
see detail B1

B3
W

Apply subfloor
­adhesive to all
contact surfaces

Two 21⁄2" screws for 2x_
strapping connections

Top flange
hanger
Face mount
hanger

H1

Web stiffeners required if sides of
hanger do not laterally support at least
3⁄8" of TJI® joist top flange

Directly applied ceiling

Two 8d (0.113" x 21⁄2")
nails or 21⁄2" screws,
typical

PB1 When specified on the layout, one of the above
bracing options is required

H3

Filler and Backer Block Sizes

Backer block: Install tight to top
flange (tight to ­bottom flange with
face mount ­hangers). Attach
with ten 10d (0.128" x 3")
nails, clinched
when possible.

TJI ®

Backer block
both sides of
web with single
TJI® joist

110
91⁄2" or 14"
117⁄ 8"

Filler Block(1)
(Detail H2)

2x6

2x8

Cantilever
Filler
(Detail E4)

2x6
4'-0"
long

2x10
6'-0"
long

2x6 + 3⁄8"
sheathing
4'-0" long

Depth

Filler block: Nail with ten 10d
(0.128" x 3") nails, clinched. Use ten
16d (0.135" x 31⁄2") nails from each
side with TJI® 560 joists.

210
91⁄2" or
117⁄ 8"
2x6 + 3⁄8"
sheathing

Backer Block(1)
(Detail F1
or H2)

5 ⁄ 8"

or 3⁄4"

3⁄4"

14" or
16"
2x8 + 3⁄8"
sheathing

230 or 360
91⁄2" or
14" or
117⁄ 8"
16"
2x6 + 1⁄2" 2x8 + 1⁄2"
sheathing sheathing

2x10 + 3⁄8"
sheathing
6'-0" long

2x6 + 1⁄2"
sheathing
4'-0" long

or 7⁄ 8"

2x10 + 1⁄2"
sheathing
6'-0" long

1" net

560
14" or
16"
Two
Two
2x6
2x8

117⁄ 8"

Not applicable

2x6

2x8

(1) If necessary, increase filler and backer block height for face mount hangers and maintain 1⁄8" gap at top of joist.
See detail W. Filler and backer block dimensions should accommodate required nailing without splitting. The
suggested minimum length is 24" for filler and 12" for backer blocks.

With top flange hangers, backer block required only
H2 for downward loads exceeding 250 lbs or for uplift
­conditions

Fastener Spacing and Diaphragm Design Information for TJI® Joists
Closest On-Center Spacing per Row (1)

Load from above
TJI ®
110 and 210
230
360 and 560

2x4 minimum
squash blocks

CS

1⁄16"

Use 2x4 minimum squash blocks to ­transfer
load around TJI® joist

Diaphragm Design Information (2)

8d (0.113" x 21/2"), 10d (0.148" x 3"),
8d (0.131" x 21/2"), 12d
(0.148" x 31/4"), 16d (0.162" x 31/2")
10d (0.128" x 3"),
12d (0.128" x 31/4") 16d (0.135" x 31/2")
4"
4"
3"

4"(3)
4"(3)
4"(3)

6"
6"
6"

Equivalent
Nominal
Framing Width

Maximum
Capacity
(plf)

2"
3"
3"

425
480
720

(1) One row of fasteners permitted (two at abutting panel edges) for diaphragms. Stagger nails when using
4" on‑center ­spacing and maintain 3⁄8" joist and panel edge distance. For other applications, multiple rows of ­fasteners are
permitted if the rows are offset at least 1⁄2" and staggered.
(2) To achieve code-tabulated, unblocked diaphragm design values for TJI® 110, 210, and 230 joists, use fasteners in combination with an ASTM D3498 non-polyurethane sub-floor adhesive. For nailed-only conditions, use 85% of code-tabulated values.
(3) Can be reduced to 3" on-center for light gauge steel straps with 10d (0.148" x 11/2") nails.
■

Maximum spacing of nails is 18" on-center.

■

14 ga. staples may be substituted for 8d (0.113" x 21⁄2") nails if minimum penetration of 1" is achieved.

■

Table also applies to the attachment of TJI® rim joists and blocking panels to the wall plate.

Also see nailing requirements on page 8
iLevel Trus Joist® TJI® Joist Specifier’s Guide TJ-4000

February 2008

9

RIM BOARD SELECTION AND INSTALLATION
Blocking
panel

Rim board is often an important structural link in the ability of a home to resist lateral wind loads. It also transfers
vertical load around the TJI® joists.
Rim board detail A3 (shown below) satisfies conventional construction requirements. But if your project requires a
designed solution, see our iLevel Rim Board Specifier’s Guide for Lateral Wind Loads. This easy‑to‑­use guide for
specifiers and code officials goes beyond conventional construction guidelines—which were based on the smaller,
simpler homes of the past—and p­ rovides design information that considers today’s larger, more complex homes.
Plate nail
Floor panel nail

A1
When sheathing thickness
exceeds 7⁄8", trim sheathing
tongue at rim board
Toe
nail

11⁄4" TimberStrand® LSL or
iLevel® 11⁄8" rim board
(see nailing schedule below)

A3. A3.
A3 A3.
1
2
3
2x_ stud wall at
16" on-center

TJI® rim joist

A2

Attach panel per ­nailing
schedule below

Must have 13⁄4" minimum joist bearing at ends

Flashing

11⁄4" TimberStrand® LSL
or iLevel® 11⁄8"
rim board

A3.
4

3 ⁄8"

lag bolt
lag bolt

Closest On-Center Spacing per Row
Rim Board Thickness
11⁄8"
11⁄4"
4"
6"(1)

Allowable Load(1) (lbs)
iLevel ®
11⁄4"
TimberStrand ® LSL
11⁄8"
Rim Board
Rim Board
400
N.A.
475
400

■

If more than one row of nails is used, the rows must be offset at least 1/2" and staggered.

■

14 ga. staples may be substituted for 8d (0.113" x 21/2") nails if minimum penetration of 1" is achieved.

Rim Board Installation
Specifications
Rim Board Thickness
Plate Nail—16d (0.135" x 31⁄2")
Floor Panel Nail—8d (0.131" x 21⁄2")
Toe Nail—10d (0.128" x 3")
Wall Sheathing

applications.

A3
Conventional Construction,
Code Minimum
11⁄ 8" or 11⁄4"
16" o.c.
6" o.c.
6" o.c.
Per code

Vertical Load Transfer at Bearing
Allowable Uniform Vertical Loads (PLF)
TJI ® rim joist or blocking
2,100
11⁄4" TimberStrand ® LSL rim board or blocking
4,250
iLevel ® 11⁄8" rim board or blocking
4,000
 Loads may not be increased for duration of load.
■

Also see nailing requirements on page 8

10

6"
16"

(1) Can be reduced to 4" on-center with maximum nail penetration of 13⁄8" into the narrow edge.

	Corrosion-resistant fasteners required for ­wet‑service

LA

12"
min.

8d (0.113" or 0.131" x 21⁄2"),
10d (0.128" or 0.148" x 3"), 12d (0.128" or 0.148" x 31⁄4")
16d (0.162" x 31⁄2")

(1)	Allowable load determined in accordance with AC 124.
■

Install proper ­blocking to
support all panel edges

Nail Size

See fastener table below.
Maintain 2" distance
(minimum) from edge of
ledger to fastener.

1 ⁄ 2"

Toe nail

Fastening of Floor Panels to 11⁄4" TimberStrand® LSL
or iLevel® 11⁄8" Rim Board

Treated
2x_ ledger

Fastener

11⁄4" TimberStrand® LSL
rim board

When sheathing thickness
exceeds 7⁄8", trim sheathing
tongue at rim board

Exterior Deck Attachment
Structural exterior
sheathing

Plate nail
Floor panel nail

iLevel Trus Joist® TJI® Joist Specifier’s Guide TJ-4000

February 2008

A3.1, A3.2, A3.3, A3.4
Designed
Solution
See the iLevel
Rim Board Specifier’s Guide
for Lateral Wind Loads
(Reorder #TJ-8000)

ALLOWABLE HOLES
Minimum distance from Table B

Minimum distance from Table A
No field cut holes
in hatched zones
6"

11⁄2" hole may be cut
anywhere in web outside
of hatched zone

6"

6"

2 x D1
D1
minimum
(applies to all holes
except knockouts)

L2

L1

Table A—End Support

2 x L2 D2
minimum

6"

6"

Do not cut holes ­larger
than 11⁄2" in cantilever

Minimum distance from edge of hole to inside face of nearest end support
Depth
9 1⁄ 2 "

117⁄ 8"

14"

16"

TJI ®
110
210
230
110
210
230
360
560
110
210
230
360
560
210
230
360
560

2"
1'-0"
1'-0"
1'-0"
1'-0"
1'-0"
1'-0"
1'-0"
1'-0"
1'-0"
1'-0"
1'-0"
1'-0"
1'-0"
1'-0"
1'-0"
1'-0"
1'-0"

3"
1'-6"
1'-6"
2'-0"
1'-0"
1'-0"
1'-0"
1'-0"
1'-0"
1'-0"
1'-0"
1'-0"
1'-0"
1'-0"
1'-0"
1'-0"
1'-0"
1'-0"

4"
2'-0"
2'-0"
2'-6"
1'-0"
1'-0"
1'-0"
1'-6"
1'-6"
1'-0"
1'-0"
1'-0"
1'-0"
1'-0"
1'-0"
1'-0"
1'-0"
1'-0"

• Round Hole Size
7"
5"
6 1⁄ 2 "
2'-6" 5'-0"
3'-0" 5'-0"
3'-6" 5'-6"
1'-0" 2'-6" 2'-6"
1'-6" 2'-6" 3'-0"
2'-0" 3'-0" 3'-6"
2'-6" 4'-6" 5'-0"
3'-0" 5'-0" 5'-6"
1'-0"
1'-0"
1'-0"
1'-0"
1'-0"
1'-6"
1'-0"
1'-6" 2'-0"
1'-0" 2'-6" 3'-0"
1'-0" 2'-6" 3'-0"
1'-0"
1'-0"
1'-0"
1'-0"
1'-0"
1'-0"
1'-0"
1'-0"
1'-0"
1'-0"
1'-0"
1'-0"

■ Square or Rectangular Hole Size

87⁄ 8"

5'-0"
5'-6"
6'-0"
7'-0"
8'-0"
2'-6"
3'-0"
3'-6"
5'-6"
6'-0"
1'-6"
2'-0"
3'-0"
3'-0"

11"

5'-0"
6'-0"
6'-6"
8'-0"
9'-0"
3'-6"
4'-0"
6'-0"
6'-6"

13"

6'-0"
6'-6"
9'-0"
10'-0"

2"
1'-0"
1'-0"
1'-0"
1'-0"
1'-0"
1'-0"
1'-0"
1'-0"
1'-0"
1'-0"
1'-0"
1'-0"
1'-0"
1'-0"
1'-0"
1'-0"
1'-0"

3"
1'-6"
2'-0"
2'-0"
1'-0"
1'-0"
1'-0"
1'-0"
2'-0"
1'-0"
1'-0"
1'-0"
1'-0"
1'-0"
1'-0"
1'-0"
1'-0"
1'-0"

4"
2'-6"
2'-6"
3'-0"
1'-6"
2'-0"
2'-0"
2'-6"
3'-6"
1'-0"
1'-0"
1'-0"
1'-0"
1'-6"
1'-0"
1'-0"
1'-0"
1'-0"

5"
3'-6"
4'-0"
4'-6"
2'-6"
3'-0"
3'-0"
4'-0"
5'-0"
1'-6"
2'-0"
2'-0"
2'-6"
3'-6"
1'-0"
1'-0"
1'-0"
1'-6"

6 1⁄ 2 "
4'-6"
5'-0"
5'-0"
4'-6"
5'-0"
5'-6"
6'-6"
7'-0"
3'-6"
4'-0"
4'-0"
5'-6"
6'-6"
2'-6"
3'-0"
4'-0"
5'-0"

7"

87⁄ 8"

11"

13"

4'-6"
5'-6"
5'-6"
6'-6"
7'-6"
4'-0"
4'-6"
5'-0"
6'-6"
7'-0"
3'-6"
3'-6"
5'-0"
6'-0"

6'-0"
6'-6"
7'-0"
7'-6"
8'-0"
6'-0"
6'-6"
7'-0"
8'-0"
9'-0"
6'-6"
7'-0"
9'-0"
10'-0"

8'-0"
8'-6"
9'-0"
9'-6"
10'-0"
8'-0"
9'-0"
10'-0"
11'-0"

10'-6"
11'-0"
11'-6"
12'-0"

Table B—Intermediate or Cantilever Support

Minimum distance from edge of hole to inside face of nearest intermediate or cantilever support
Depth
9 1⁄ 2 "

117⁄ 8"

14"

16"

■

TJI ®
110
210
230
110
210
230
360
560
110
210
230
360
560
210
230
360
560

2"
1'-6"
2'-0"
2'-6"
1'-0"
1'-0"
1'-0"
2'-0"
1'-6"
1'-0"
1'-0"
1'-0"
1'-0"
1'-0"
1'-0"
1'-0"
1'-0"
1'-0"

3"
2'-6"
2'-6"
3'-0"
1'-0"
1'-0"
2'-0"
3'-0"
3'-0"
1'-0"
1'-0"
1'-0"
1'-0"
1'-0"
1'-0"
1'-0"
1'-0"
1'-0"

4"
3'-0"
3'-6"
4'-0"
1'-6"
2'-0"
2'-6"
4'-0"
4'-6"
1'-0"
1'-0"
1'-0"
2'-0"
1'-6"
1'-0"
1'-0"
1'-0"
1'-0"

• Round Hole Size
5"
6 1⁄ 2 "
7"
4'-0" 7'-6"
4'-6" 7'-6"
5'-0" 8'-0"
2'-6" 4'-0" 4'-0"
3'-0" 4'-6" 5'-0"
3'-6" 5'-0" 5'-6"
5'-6" 7'-0" 7'-6"
5'-6" 8'-0" 8'-6"
1'-0" 2'-0" 2'-6"
1'-0" 2'-6" 3'-0"
2'-0" 3'-0" 3'-6"
3'-6" 5'-6" 6'-0"
3'-6" 5'-6" 6'-6"
1'-0"
1'-0"
1'-0"
1'-0"
1'-6" 2'-0"
1'-0" 3'-0" 4'-0"
1'-0" 2'-6" 3'-6"

■ Square or Rectangular Hole Size

87⁄ 8"

8'-0"
9'-0"
9'-6"
11'-0"
12'-0"
4'-6"
5'-0"
5'-6"
8'-6"
9'-6"
3'-0"
4'-0"
6'-6"
7'-0"

11"

8'-0"
9'-0"
10'-0"
12'-6"
13'-6"
5'-6"
6'-6"
10'-0"
11'-0"

13"

9'-6"
10'-6"
13'-6"
15'-0"

2"
1'-6"
2'-0"
2'-6"
1'-0"
1'-0"
1'-0"
2'-0"
3'-0"
1'-0"
1'-0"
1'-0"
1'-0"
1'-0"
1'-0"
1'-0"
1'-0"
1'-0"

3"
2'-6"
3'-0"
3'-0"
1'-6"
2'-0"
2'-6"
3'-6"
4'-6"
1'-0"
1'-0"
1'-0"
2'-0"
3'-0"
1'-0"
1'-0"
1'-0"
1'-0"

4"
3'-6"
4'-0"
4'-6"
2'-6"
3'-0"
3'-6"
5'-0"
6'-0"
1'-0"
2'-0"
2'-6"
4'-0"
5'-0"
1'-0"
1'-0"
2'-0"
3'-6"

5"
5'-6"
6'-0"
6'-6"
4'-0"
4'-6"
5'-0"
7'-0"
8'-0"
2'-6"
3'-6"
4'-0"
5'-6"
7'-0"
2'-0"
2'-6"
4'-0"
5'-6"

6 1⁄ 2 "
6'-6"
7'-0"
7'-6"
6'-6"
7'-6"
8'-0"
9'-6"
10'-6"
5'-0"
6'-0"
6'-0"
9'-0"
10'-0"
4'-6"
5'-0"
7'-6"
9'-0"

7"

87⁄ 8"

11"

13"

7'-0"
8'-0"
8'-6"
9'-6"
11'-0"
6'-0"
7'-0"
7'-6"
10'-0"
11'-0"
5'-6"
6'-0"
8'-6"
10'-0"

9'-0"
10'-0"
10'-0"
11'-0"
12'-0"
9'-0"
10'-0"
10'-6"
12'-0"
13'-6"
9'-6"
10'-6"
13'-0"
14'-6"

12'-0"
12'-6"
13'-0"
14'-0"
15'-0"
12'-6"
13'-0"
14'-6"
16'-0"

15'-6"
16'-0"
17'-0"
18'-0"

Rectangular holes based on measurement of longest side.

How to Use These Tables

DO NOT
cut or notch flange.

General Notes

1. 	Using Table A, Table B, or both if required, d­ etermine the hole
shape/size and select the TJI® joist and depth.
2.	Scan horizontally until you intersect the correct hole size
column.
3.	Measurement shown is minimum distance from edge of hole to
support.

■

■

■

4.	Maintain the required minimum ­distance from the end and the
intermediate or ­cantilever support.
■

	Holes may be located vertically anywhere within the web. Leave
1⁄8" of web (minimum) at top and bottom of hole.
	Knockouts are located in web at approximately 12" on­­­‑center;
they do not affect hole placement.
	For simple span (5' minimum) uniformly loaded joists meeting
the requirements of this guide, one maximum size round hole
may be l­ocated at the center of the joist span provided that no
other holes occur in the joist.

DO NOT
cut holes in cantilever
­reinforcement.

	Distances are based on the maximum uniform loads shown in
this guide. For other load conditions or hole configurations, use
TJ-Beam® software or c­ ontact your iLevel representative.

iLevel Trus Joist® TJI® Joist Specifier’s Guide TJ-4000

February 2008

11

cantilevers
Cantilevers Less Than 5" (Brick Ledge)

Cantilevers 5" to 24"

See Section A of cantilever table on page 13

Roof truss span

See Section B of cantilever table on page 13

Roof truss span

2'-0"

40 psf live load
L2

2'-0"

40 psf live load
L2

L1
Less than 5"

TJI® joists may be cantilevered up to 5"
when ­supporting roof load, assuming:
simple or continuous span
L1 ≤ L2
minimum backspan = 2x cantilever length

L1

5" to 24"

TJI® joists may be cantilevered 5" to 24" when
s­ upporting roof load, assuming:
simple or continuous span
L1 ≤ L2
minimum backspan = 2x cantilever length

■

■

■

■

■

■

TJI ® joists are intended
for dry-use applications

12" length of
reinforcement on
one side at E5/E7, both sides at
E6/E8. Attach to joist with one 8d
(0.131" x 21⁄2") nail at each corner.
3⁄4"

5"

Web stiffeners
required at E1W

4"

to 2

8" diameter maximum hole for 117⁄8"–16" deep blocking
panels; 6" diameter maximum for blocking ­panels 91⁄2"
deep or shorter than 12" long. Do not cut flanges.
11⁄4" TimberStrand® LSL or
iLevel® 11⁄8" rim board ­closure, ­typical
4'-0" length of 3⁄4" reinforcement on one side
at E2, both sides at E3. Attach to joist with
8d (0.131" x 21⁄2") nails at 6" on-center. When
reinforcing both sides, stagger nails.

11⁄4" TimberStrand® LSL or
iLevel® 11⁄8" rim board, typical.
Nail with 10d (0.128" x 3")
nails, one each at top and
­bottom flange.

11 ⁄2
Blocking panel between each
joist. Full depth vertical
blocking at E5 and E6,
horizontal blocking at E7
and E8.

Wood
backer
Nail with connections
equivalent to floor panel
schedule (E7 and E8)

s
ime

t

til

can

th

eng

rl
eve

gth
len m
r
e
v
u
tile xim nly)
Can 0" ­ma ads o
o
l
4' orm
if
(un

Nail through 2x_cantilever,
wood backer, and TJI®
joist web with two rows
10d (0.148" x 3") nails
at 6" on-center, clinched.
Use 16d (0.135" x 31⁄2")
nails with TJI® 560 joists.
F1 applies to uniformly
loaded joists only.

6'-0" length of TJI® joist reinforcement and filler block at E4. Attach to joist
web with three rows 10d (0.148" x 3") nails at 6" on-center, clinched. Use 4'-0"
length with 91⁄2" and 117⁄8" TJI® joists, and attach to joist web with two rows 10d
(0.148" x 3") nails at 6" on-center, clinched. Not for use with TJI® 560 joists.

Less
than 5"

These Conditions Are NOT Permitted
DO NOT bevel cut joist
beyond inside face of wall.

12

DO NOT use sawn lumber
for rim board or blocking.

DO NOT install hanger
overhanging face of plate or beam.

Sawn lumber may shrink after installation.

Flush bearing plate with inside face
of wall or beam.

iLevel Trus Joist® TJI® Joist Specifier’s Guide TJ-4000

February 2008

cantilevers
Cantilever Reinforcement
Section A: Cantilevers less than 5" (Brick Ledge)
Depth

9 1⁄ 2 "
117⁄ 8"
14"

9 1⁄ 2 "
117⁄ 8"
14"
16"

9 1⁄ 2 "
117⁄ 8"
14"
16"

117⁄ 8"
14"
16"

117⁄ 8"
14"
16"

TJI ®

110

210

230

360

560

Roof
Truss
Span

35 PSF
16"

19.2"

E5
E5

E5
E5
E5
E5
X

20'
22'
24'
26'
28'
30'
32'
20'
22'
24'
26'
28'
30'
32'
24'
26'
28'
30'
32'
34'
28'
30'
32'
34'
36'
38'
40'
30'
32'
34'
36'
38'
40'

E5

E5
E5
E5
E5

E5
E5

E5
E5
E5
E5
E5

E5
E5

E5
E5
E5
E5
E5
E5

E5
E5
E5

Roof Total Load
45 PSF
On-Center Joist Spacing
24"
16" 19.2" 24"
16"
E5
E5
E5
E5
E5
E5
E5
E5
E5
E5
E5
E5
E5
E5
E5
E5
E5
X
E5
E5
X
E5
X
E5
E5
X
E5
X
E5
X
X
E5
E5
E5
E5
E5
E5
E5
E5
E5
E5
E5
E5
E5
E5
E5
E5
E5
E5
E5
E5
E5
E5
E5
E5
X
E5
E5
X
E5
E5
E5
E5
E5
E5
E5
E5
E5
E5
E5
E5
E5
E5
E5
E5
E5
E5
E5
X
E5
E5
X
E5
X
E5
E5
X
E5
E5
E5
E5
E5
E5
E5
E5
E5
E5
E5
E5
E5
E5
E5
E5
E5
E5
E5
E5
E5
E5
E5
E5
E5
E5
E5
E5
E5
E5
E5
E5
E5
E5
E5
E5
E5
E5
E5
E5
E5
E5
E5
E5
E5
E5
E5
E5
E5
E5
E5
E5
E5
E5
E5
E5
E5
E5
E5

How to Use This Table
1.	 Identify

TJI®

Section B: Cantilevers 5" to 24"

55 PSF
19.2"
E5
E5
E5
E5
E5
E5
X
E5
E5
E5
E5
E5
E5
E5
E5
E5
E5
E5
E5
E5
E5
E5
E5
E5
E5
E5
E5
E5
E5
E5
E5
E5
E5

35 PSF
24"
E5
E5
E5
E6
X
X
X
E5
E5
E5
E5
E6
E6
X
E5
E5
E5
E5
X
X
E5
E5
E5
E6
E6
E6
E6
E5
E5
E5
E6
E6
E6

16"

E2

19.2"

E2
E3
X

E2

E2
E3

Roof Total Load
45 PSF
On-Center Joist Spacing
24"
16" 19.2" 24"
16"
X
X
X
X
E2
X
E2
X
E2
X
X
X
X
E3
X
X
X
X
X
X
X
X

E2
E3
X

E2
E3
X

E2
E3

E2
E3
X

E2
E3

E2
E2
E3
X

E2
E2
X
X
X
X
E2
E2
E3
X
X
X

E1W

E1W
E2
E2
E2
E2
E2

E1W
E1W
E1W

E1W

55 PSF
19.2"
X
X
X
X
X
X

E2
E3
X

E2
X
X
X

E2
E2
E3
X

E2
E3
X
X
X

E1W
E2
E2
E2

24"
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
E2
E2
E2
E3
E3
E3
E3

E2
E2
E2
E2

General Notes

joist and depth.

	Table is based on:
– 15 psf roof dead load on a horizontal projection.
–	80 plf exterior wall load with 3'-0" maximum width window or door openings.
For larger openings, or multiple 3'‑0" width openings spaced less than 6'-0"
on-center, additional joists beneath the o­ pening’s t­ rimmers may be required.
		 – More restrictive of simple or continuous span.
		 – Roof truss with 24" soffits.
■

2.	Locate the Roof Truss Span (horizontal) that meets or exceeds your c­ ondition.
3.	Identify the cantilever condition (less than 5" or 5" to 24") and locate the Roof
Total Load and On-Center Joist Spacing for your a­ pplication.
4.	Scan down to find the appropriate cantilever detail and refer to drawing
on page 12:
– Blank cells indicate that no reinforcement is required.
– E4 may be used in place of E2 or E3 except when using TJI® 560 joists.
–	X indicates that cantilever will not work. Use TJ‑Beam® or TJ-Xpert® ­software,
or reduce spacing of joists and recheck table.

■

■

■

	3⁄4" reinforcement refers to 3⁄4" Exposure 1 p­ lywood or other 3⁄4" Exposure 1,
48/24-rated sheathing that is cut to match the full depth of the TJI® joist. Install
with face grain horizontal. Reinforcing member must bear fully on the wall plate.
	Designed for 2x4 and 2x6 plate widths.
	For conditions beyond the scope of this table, including cantilevers longer than
24", use our TJ-Beam® or ­TJ‑Xpert® software.

iLevel Trus Joist® TJI® Joist Specifier’s Guide TJ-4000

February 2008

13

Fire-safe construction
Fire-safe construction and life safety are major concerns for everyone in the building materials and
construction industry. The 2005 US Fire Administration (http://www.usfa.dhs.gov/statistics/national/) statistics
on residential and commercial fires in the U.S. alone include 3,675 fire fatalities and an estimated $10.7 billion
in property damage. These numbers underscore the seriousness of the issue and the need for fire-safe
construction.
Over the past 35 years, prefabricated wood I-joists and other iLevel building products have established a
record of safe and reliable performance in millions of structures. Many of these structures, such as one- or twofamily residential dwellings, do not require specific fire-resistance ratings per the building codes. The following
information is intended to help you specify and install iLevel® Trus Joist® brand products with fire safety in
mind.

Active Fire Suppression
Automatic fire sprinkler systems are commonly required by building codes in schools,
office buildings, factories, and other commercial buildings. Buildings designed with
sprinkler systems are allowed larger heights and areas than buildings designed
without sprinkler systems.
Fire service agencies, such as the US Fire Administration, promote the use of
residential sprinkler systems. These agencies cite benefits such as lowering the total
cost of construction to the homebuilder, ensuring a safer environment, and lowering
insurance rates for the homeowner. Using automatic fire sprinkler systems provides
the following benefits:
■

Early and unsupervised suppression

■

Reduced fire and smoke development

■

Potentially enhanced life safety for the occupant(s)

steel—­succumb quickly to fire if not protected. If a protective membrane such as
gypsum ceiling board is applied to all types of floor framing within the structure, it
will ­provide additional and uniform protection to the structural framing members.
Passive fire-protection can do the following:
■

Delay fire growth involving structural elements

■

	Reduce the potential for significant property damage to structural elements

■

	Enhance the market value of the building

Suggested Minimum Membrane Construction
1

2

iLevel supports the idea
that all floor/ceiling and
roof/ceiling assemblies
in habitable areas be
protected by a minimum
membrane protection
consisting of 1⁄2" gypsum
board (or equivalent)

Smoke Detectors
Smoke detectors are universally recognized as the most cost-effective life-saving
devices. While smoke detectors do not ­provide protection to the structure or to the
contents in a home, they do alert occupants to potential fire hazards and allow them
time to escape. Similarly, carbon monoxide detectors can also alert occupants to
faulty heating appliances or air contamination in the early stages of a fire.

4

3

5

1.	48/24 tongue-and-groove span-rated sheathing (Exposure 1)
2.	TJI® joist
3.	 Single layer 1⁄2" thick gypsum board
4.	 Resilient channels at 16" on-center (optional)

Passive Fire Protection
Independent tests show that unprotected framing s­ ystems, whether combustible
or non-combustible, suffer increased structural ­degradation when exposed to fire.
All floor framing materials—sawn l­umber, wood ­I‑joists, trusses, and light-gauge

5.	Optional when used with resilient channels. Minimum 31/2" thick glass fiber
insulation or non-combustible insulation that is rated R-30 or less.

One-Hour Assembly
1.	48/24 tongue-and-groove, span-rated sheathing (Exposure 1)

1

2.	 Two layers 1⁄2" thick Type X gypsum board
3.	 TJI® joist
Optional when used with resilient channels (not shown): Minimum 31⁄2" thick glass
fiber insulation or non‑combustible insulation that is rated R-30 or less
3

Note

2

Resilient channels may be installed between the joists and g­ ypsum board if
improved STC and IIC sound r­ atings are desired.
For more information on fire assemblies and fire-safe construction,
please refer to the iLevel Fire Facts Guide (Reorder #1500) or
visit www.iLevel.com and www.i-joist.com

14

Reference Assembly B per ICC ES ESR-1153

iLevel Trus Joist® TJI® Joist Specifier’s Guide TJ-4000

February 2008

understanding and preventing floor noise
Silent Floor® joists are structurally uniform and dimensionally stable,
and they resist shrinking and twisting. This helps prevent gaps from
forming around the nails between the joist and the floor panels—
gaps that can potentially cause squeaks or other floor noise.
Using Silent Floor® joists can help you build a quieter floor, but only
if the entire floor system is installed properly. This is because other
components of the floor system, such as hangers, connectors, and
nails can be a source of floor noise.
To get the best possible performance out of your Silent Floor® joists
and minimize potential squeaks in your floor, we recommend the
following installation tips:

Properly Seat Each Joist in Hanger

Use Adhesive and Special Nailing When Needed
Construction
adhesive

Dab subfloor adhesive
in seat of hanger

Bend tab
and fasten

Seat the joist tight to the bottom of the hanger. When using hangers with tabs, bend
the flange tabs over and nail to the TJI® joist bottom flange.
Placing a dab of subfloor adhesive in the seat of the hanger prior to installing the joist
can reduce squeaks.

Nail interior partitions to the joists when possible. If the wall can be nailed only to the
floor panel, run a bead of adhesive under the wall and either cross nail, nail through
and clinch tight, or screw tightly into the wall from below.

Avoid “Shiners”

Prevent Shrinkage
Movement

Gaps develop as
sheathing shrinks

Keep building materials dry, and properly glue floor panels to the joists. Panels that
become excessively wet during construction shrink as they dry. This shrinkage may
leave gaps that allow the panel to move when stepped on.

Shiner

Exercise care when nailing. Nails that barely hit the joists (shiners) do not hold the
panel tight to the joist and should be removed. If left in, the nails will rub against the
side of the joist when the panel deflects.

For more information and tips on how to prevent floor noise, refer to the
iLevel Prevention and Repair of Floor System Squeaks Technical Resource Sheet (Reorder #9009) or contact your iLevel representative.

iLevel Trus Joist® TJI® Joist Specifier’s Guide TJ-4000

February 2008

15

roof span table
Maximum Horizontal Clear Spans—Roof
O.C.
Spacing

Depth

9 1⁄ 2 "

117⁄ 8"

16"
14"

16"

9 1⁄ 2 "

117⁄ 8"

19.2"
14"

16"

9 1⁄ 2 "

117⁄ 8"

24"
14"

16"

TJI ®
110
210
230
110
210
230
360
560
110
210
230
360
560
210
230
360
560
110
210
230
110
210
230
360
560
110
210
230
360
560
210
230
360
560
110
210
230
110
210
230
360
560
110
210
230
360
560
210
230
360
560

Non-Snow (125%)
20LL + 15DL
20LL + 20DL
Low
High
Low
High
19'-3"
17'-2"
18'-4"
16'-3"
20'-5"
18'-2"
19'-5"
17'-3"
21'-0"
18'-9"
20'-0"
17'-9"
23'-0"
20'-6"
21'-11"
19'-5"
24'-4"
21'-9"
23'-3"
20'-7"
25'-1"
22'-5"
23'-11"
21'-3"
27'-9"
24'-9"
26'-5"
23'-5"
31'-11"
28'-6"
30'-5"
27'- 0"
26'-3"
23'-5"
25'- 0"
22'-2"
27'-9"
24'-9"
26'-5"
23'-5"
28'-7"
25'-6"
27'-2"
24'-2"
31'-6"
28'-2"
30'-0"
26'-8"
36'-3"
32'-4"
34'-6"
30'-7"
30'-9"
27'-5"
29'-4"
26'- 0"
31'-8"
28'-3"
30'-2"
26'-9"
34'-11"
31'-2"
33'-3"
29'-6"
40'-1"
35'-9"
38'-2"
33'-11"
18'-1"
16'-1"
17'-3"
15'-3"
19'-2"
17'-1"
18'-3"
16'-2"
19'-9"
17'-7"
18'-10"
16'-8"
21'-7"
19'-3"
20'-7"
18'-3"
22'-11"
20'-5"
21'-10"
19'-4"
23'-7"
21'-1"
22'-6"
19'-11"
26'-1"
23'-3"
24'-10"
22'-0"
30'- 0"
26'-9"
28'-7"
25'-4"
24'-6"
22'- 0"
22'-9"
20'-10"
26'-0"
23'-3"
24'-10"
22'-0"
26'-10"
23'-11"
25'-7"
22'-8"
29'-7"
26'-5"
28'-2"
25'-0"
34'-0"
30'-4"
32'-5"
28'-9"
28'-8"
25'-9"
26'-9"
24'-5"
29'-9"
26'-7"
28'-2"
25'-2"
32'-10"
29'-3"
31'-3"
27'-9"
37'-8"
33'-7"
35'-10"
31'-10"
16'-9"
14'-11"
15'-11"
14'-2"
17'-9"
15'-10"
16'-11"
15'- 0"
18'-3"
16'-4"
17'-5"
15'-5"
20'-0"
17'-10"
18'-9"
16'-11"
21'-2"
18'-11"
20'-2"
17'-11"
21'-10"
19'-6"
20'-10"
18'-5"
24'-1"
21'-6"
23'- 0"
20'-5"
27'-9"
24'-9"
26'-5"
23'-6"
21'-10"
20'-4"
20'-4"
19'-1"
24'- 0"
21'-6"
22'-4"
20'-5"
24'-10"
22'-2"
23'-7"
21'- 0"
27'-5"
24'-6"
26'-1"
23'-2"
31'-6"
28'-1"
30'- 0"
26'-8"
25'-8"
23'-11"
23'-11"
22'-4"
27'-1"
24'-7"
25'-2"
23'-3"
30'-4"
27'-1"
28'-11"
25'-8"
34'-10"
31'-2"
33'-2"
29'-6"

Design Live Load (LL) and Dead Load (DL) in PSF
Snow Load Area (115%)
25LL + 15DL
30LL + 15DL
40LL + 15DL
Low
High
Low
High
Low
High
18'-5"
16'-6"
17'-9"
15'-11"
16'-7"
15'- 0"
19'-6"
17'-6"
18'-9"
16'-11"
17'-7"
15'-11"
20'-2"
18'-0"
19'-4"
17'-5"
18'-1"
16'-4"
22'-0"
19'-9"
20'-11"
19'-1"
19'- 0"
17'-11"
23'-4"
20'-11"
22'-5"
20'-2"
20'-10"
19'- 0"
24'-1"
21'-7"
23'-1"
20'-10"
21'-7"
19'-7"
26'-7"
23'-10"
25'-6"
23'- 0"
23'-11"
21'-7"
30'-7"
27'-5"
29'-5"
26'-5"
27'-6"
24'-10"
24'-1"
22'-6"
22'-9"
21'-9"
20'-8"
19'-11"
26'-5"
23'-9"
25'- 0"
22'-11"
22'-8"
21'-7"
27'-4"
24'-6"
26'-4"
23'-8"
23'-11"
22'-3"
30'-2"
27'-1"
29'-0"
26'-1"
27'-2"
24'-7"
34'-8"
31'-1"
33'-4"
30'-0"
31'-2"
28'-3"
28'-3"
26'-5"
26'-9"
25'-6"
24'-3"
23'-4"
29'-10"
27'-2"
28'-2"
26'-3"
25'-7"
24'-7"
33'-5"
30'- 0"
32'-2"
28'-11"
30'-1"
27'-2"
38'-4"
34'-5"
36'-11"
33'-2"
34'-6"
31'-3"
17'-4"
15'-6"
16'-8"
15'- 0"
15'-5"
14'-1"
18'-4"
16'-5"
17'-8"
15'-10"
16'-6"
14'-11"
18'-11"
16'-11"
18'-2"
16'-4"
17'- 0"
15'-4"
20'-3"
18'-6"
19'-1"
17'-11"
17'-4"
16'-8"
21'-11"
19'-8"
20'-11"
18'-11"
19'-0"
17'-10"
22'-7"
20'-3"
21'-8"
19'-6"
20'-0"
18'-4"
24'-11"
22'-4"
24'- 0"
21'-7"
22'-5"
20'-3"
28'-8"
25'-9"
27'-7"
24'-10"
25'-9"
23'-4"
22'-0"
20'-11"
20'-9"
19'-10"
18'-10"
18'-2"
24'-2"
22'-4"
22'-10"
21'-7"
20'-8"
19'-11"
25'-5"
23'-0"
24'-0"
22'-3"
21'-10"
20'-11"
28'-4"
25'-5"
27'-3"
24'-6"
25'-6"
23'-1"
32'-7"
29'-2"
31'-4"
28'-2"
29'-3"
26'-6"
25'-10"
24'-6"
24'-5"
23'-4"
22'-1"
21'-4"
27'-3"
25'-6"
25'-9"
24'-7"
23'-4"
22'-6"
31'-5"
28'-2"
30'-2"
27'-2"
25'-7"
25'-3"
36'-0"
32'-4"
34'-8"
31'-2"
31'-3"
29'-4"
16'-0"
14'-4"
15'-2"
13'-10"
13'-9"
13'-0"
17'- 0"
15'-3"
16'-4"
14'-8"
15'-1"
13'-10"
17'-6"
15'-8"
16'-10"
15'-2"
15'-8"
14'-3"
18'-1"
17'-2"
17'-1"
16'-4"
15'-6"
14'-11"
19'-10"
18'-2"
18'-9"
17'-7"
17'- 0"
16'-4"
20'-11"
18'-9"
19'-9"
18'-1"
17'-11"
17'- 0"
23'-1"
20'-8"
22'-2"
20'- 0"
20'-5"
18'-9"
26'-7"
23'-10"
25'-6"
23'- 0"
23'-10"
21'-7"
19'-8"
18'-8"
18'-7"
17'-9"
16'-0"
16'-3"
21'-7"
20'-6"
20'-4"
19'-6"
17'-10"
17'-9"
22'-9"
21'-4"
21'-6"
20'-6"
19'-6"
18'-9"
26'-3"
23'-6"
25'-0"
22'-8"
20'-5"
20'-2"
30'-2"
27'-0"
29'- 0"
26'-1"
24'-11"
23'-7"
23'-1"
21'-11"
21'-9"
20'-10"
17'-10"
18'-3"
24'-4"
23'-1"
23'- 0"
22'- 0"
20'-0"
19'-4"
28'-2"
26'-1"
25'-0"
24'-1"
20'-5"
20'-2"
33'-4"
29'-11"
30'-6"
28'-3"
24'-11"
23'-7"

See page 17 for General Notes and information on how to use this table

16

iLevel Trus Joist® TJI® Joist Specifier’s Guide TJ-4000

February 2008

50LL + 15DL
Low
High
15'-6"
14'-3"
16'-7"
15'-1"
17'-1"
15'-6"
17'-6"
16'-11"
19'-2"
18'-0"
20'-3"
18'-7"
22'-7"
20'-6"
26'- 0"
23'-7"
19'-1"
18'-5"
20'-11"
20'-3"
22'-0"
21'-1"
25'-8"
23'-4"
29'-6"
26'-9"
22'-4"
21'-8"
23'-7"
22'-10"
26'- 0"
25'-10"
31'-8"
29'-8"
14'-2"
13'-4"
15'-7"
14'-2"
16'-1"
14'-7"
16'- 0"
15'-5"
17'-6"
16'-11"
18'-5"
17'-5"
21'-2"
19'-3"
24'-4"
22'-2"
17'- 0"
16'-10"
18'-10"
18'-5"
20'-1"
19'-5"
21'-7"
21'-8"
26'-5"
25'-2"
18'-10"
19'-8"
21'-2"
20'-9"
21'-7"
21'-8"
26'-5"
25'-5"
12'-8"
12'-3"
13'-11"
13'-1"
14'-8"
13'-6"
13'-7"
13'-10"
15'-0"
15'-2"
16'-6"
16'- 0"
17'-3"
17'-4"
21'-1"
20'-3"
13'-7"
14'-2"
15'-0"
15'-8"
16'-11"
16'-7"
17'-3"
17'-4"
21'-1"
20'-3"
15'-0"
15'-8"
16'-11"
16'-7"
17'-3"
17'-4"
21'-1"
20'-3"

roof span notes and cut length calculation
How to Use Roof Span Table on Page 16
1.	Determine appropriate live and dead load, and the load duration factor.

Horizontal length = L

2.	If your slope is 6/12 or less, use the Low slope column. If it is between 6/12 and
12/12, use the High column.

Add D factor
to obtain proper
cut length

3.	Scan down the column until you find a span that meets or exceeds the span of
your application.
D

4.	 Select TJI® joist and on-center spacing.

General Notes
■

		
		
		
		
■

	Total load limits joist deflection to L/180.

■

	Live load is based on joist deflection of L/240.

■

■

Lx

Table is based on:
– Uniform loads.
– More restrictive of simple or continuous span.
– Minimum roof surface slope of 1⁄4" in 12".
– 13⁄4" minimum end bearing and 31⁄2" minimum intermediate bearing.

s

e
lop

tor

fac

h

ngt

t le

Cu

Horizontal clear span

	A support beam or wall at the high end is required. Ridge board a­ pplications do
not provide adequate support.

Actual cut length can be approximated by multiplying the
horizontal length by the slope factor and adding the D factor.

	Spans shown assume no web stiffeners at intermediate bearings.

D Factors
Depth
9 1⁄ 2 "
117⁄ 8"
14"
16"

21⁄2 in 12
2"
21⁄2"
3"
33 ⁄ 8"

3 in 12
23 ⁄ 8 "
3"
31⁄2"
4"

31⁄2 in 12
27⁄8"
31⁄2"
41⁄8"
43⁄4"

4 in 12
31⁄4"
4"
43⁄4"
53⁄ 8"

41⁄2 in 12
35⁄8"
41⁄2"
51⁄4"
6"

5 in 12
4"
5"
57⁄8"
63⁄4"

Slope
6 in 12
43⁄4"
6"
7"
8"

7 in 12
55⁄8"
7"
81⁄4"
93 ⁄ 8 "

8 in 12
63⁄ 8"
8"
93 ⁄ 8 "
103⁄4"

9 in 12
71⁄8"
9"
101⁄2"
12"

10 in 12
8"
10"
113⁄4"
133⁄8"

11 in 12
83⁄4"
11"
127⁄8"
143⁄4"

12 in 12
91⁄2"
117⁄8"
14"
16"

3 in 12
1.031

31⁄2 in 12
1.042

4 in 12
1.054

41⁄2 in 12
1.068

5 in 12
1.083

6 in 12
1.118

7 in 12
1.158

8 in 12
1.202

9 in 12
1.250

10 in 12
1.302

11 in 12
1.357

12 in 12
1.414

Slope Factors
Slope
Factor

21⁄2 in 12
1.021

iLevel Trus Joist® TJI® Joist Specifier’s Guide TJ-4000

February 2008

17

roof framing
WARNING
Joists are unstable until
laterally braced.
See Warning Notes on page 5.
Safety bracing (1x4 ­minimum) placed
at 8' on-center ­(6' on-center for TJI®
110 joists) and extended to a braced
end wall. Fasten at each joist with two
8d (0.113" x 21⁄2") nails minimum.

Joists must be laterally supported at
cantilever and end bearings by shear
blocking, hangers, or direct attachment
to a rim board or rim joist
See
Allowable Holes
on page 11

General Notes
■

■

	Unless otherwise noted, all details are valid to a maximum slope of 12/12.
	Web stiffeners are required if the sides of the hanger do not laterally support at
least 3⁄8" of the TJI® joist top flange.

TJI® Joist Nailing Requirements at Bearing
TJI® Joist to Bearing Plate
End Bearing
(13⁄4" minimum bearing required)

Blocking to Bearing Plate

Intermediate Bearing
(31⁄2" minimum bearing required)

8d (0.113" x 21⁄2") nail,
one each side, 11⁄2"
minimum from end

Slopes 3/12 or less:
One 8d (0.113" x 21⁄2") nail each side. See detail R7.
Slopes greater than 3/12:
Two 8d (0.113" x 21⁄2") nails each side, plus a twist strap
and backer block. See detail R7S.
When slope exceeds 1⁄4" per foot, a beveled bearing plate, variable slope seat connector, or birdsmouth cut (at low
end of joist only) is required

18

iLevel Trus Joist® TJI® Joist Specifier’s Guide TJ-4000

11⁄4" TimberStrand® LSL or iLevel® 11⁄8" rim board:
Toenail with 10d (0.128" x 3") nails at 6" on-center or
16d (0.135" x 31⁄2") nails at 12" on-center
TJI® joist blocking:
10d (0.128" x 3") nails at 6" on‑center
Shear transfer nailing:
Use connections ­equivalent to sheathing nail schedule

February 2008

roof details
Birdsmouth Cut

Shear blocking—
11⁄4" TimberStrand® LSL
rim board, iLevel® 11⁄8"
rim board, or TJI® joist

1⁄3

Beveled web ­stiffeners
required on both sides.
Cut to match roof slope.

Variable slope
seat connector

Beveled bearing plate
required when slope
exceeds 1⁄4" in 12"

R1

Allowed at low end of joist only

V-cut shear blocking—
11⁄4" TimberStrand® LSL
rim board

adjacent span maximum

1⁄3

R3

TJI® joist
flange must
bear fully on
plate

adjacent span maximum

Allowed at low end of joist only

Twist strap and backer block required at
R7S with slopes greater than 3/12. See
nailing requirements on page 18.

Two rows 8d
(0.113" x 21⁄2") nails
at 8" on-center

2x4 one side. Use 2x4 both
sides if joist spacing is
greater than 24" on-center.

0" m
4'- imu
n
mi

11⁄2"

Beveled bearing plate
required when slope
exceeds 1⁄4" in 12"

R7
W

Birdsmouth
cut must not
overhang
inside face
of plate

Birdsmouth Cut

Intermediate Bearing

R7

2x4 block for
soffit support

R5

Blocking panels or shear blocking may be specified
for joist stability at intermediate supports
Web stiffeners
required each side
at R7W

"
2'-0 um
m
i
x
ma

R7
S

Beveled 2x4 block with
beveled web stiffener on
opposite side of web

"
2'-0 um
xim
a
m

R8

Birdsmouth Cut

Allowed at low end of joist only

0" m
4'- imu
n
i
m

Two rows 8d
(0.113" x 21⁄2") nails
at 8" on-center

2x4 one side. Use 2x6 if joist spacing
is greater than 24" on-center.

0" m
4'- imu
n
i
m

2x4 one side. Use 2x4 both
sides if joist spacing is
greater than 24" on-center.
11⁄2"

Filler
Beveled
2x4 block

10d (0.128" x 3") nails
at 8" on-center
"
2'-0 um
m
i
x
ma

R9

"
2'-0 um
xim
a
m

Beveled 2x4 block
Beveled web stiffeners on both sides

Beveled bearing plate required
when slope exceeds 1⁄4" in 12"

R10

These Conditions Are NOT Permitted
DO NOT cut holes
too close to support.

DO NOT bevel cut joist
beyond inside face of wall.

Refer to Allowable Holes on page 11
for minimum distance from support.
iLevel Trus Joist® TJI® Joist Specifier’s Guide TJ-4000

DO NOT overhang birdsmouth cut
from inside face of plate.

TJI® joist flange must bear fully on the plate.
See detail BC on page 20.
February 2008

19

roof details

may be required for
shear transfer

Birdsmouth Cut

L

Double joist may
be required when L
exceeds joist spacing

LSTA18 (Simpson or USP) strap with
twelve 10d (0.148" x 11⁄2") nails
Additional blocking

Allowed at low end of joist only
L

Beveled web stiffener each
side of TJI® joist web

Double beveled ­bearing
plate when slope exceeds
1⁄4" in 12"

R14

Strap nails:
Leave 23⁄8"
minimum
end distance,
typical

Blocking as
required

End wall
2x_ overhang. Notch around
TJI® joist top flange.

O

LSTA24 (Simpson or USP) strap with twelve
10d (0.148" x 11⁄2") nails required at H5S
with slopes greater than 3/12

TJI® joist flange must bear fully
on plate. Birdsmouth cut must not
overhang inside face of plate.

BC
Backer block: Install tight to ­bottom
flange (tight to top flange with top flange
hangers). Attach with ten 10d (0.128" x 3")
nails, clinched when possible.

Filler block: Attach with ten
10d (0.128" x 3") nails,
clinched. Use ten 16d
(0.135" x 31⁄2") nails
from each side with
TJI® 560 joists.

Additional blocking
may be required for
shear transfer

LSTA18 strap nails at H6S with
slopes greater than 3/12

Strap nails: Leave 23⁄8"
­minimum end distance, typical

Strap nails: Leave 23⁄8"
minimum end distance
Variable slope joist hanger. See
pages 22 and 23. Beveled web
stiffener required each side.

H5 H5S

Variable slope joist hanger. See
pages 22 and 23. Beveled web
stiffener required each side.

H6 H6S

Shear Blocking and Ventilation Holes (Roof Only)
Field trim to match joist depth at outer edge of
wall or locate on wall to match joist depth

1⁄ 3

1⁄ 3

1⁄ 3

1⁄ 3

1⁄ 3

1⁄ 3

1⁄ 3

1⁄ 2

1⁄ 3

1⁄ 2

1⁄ 3

Allowed hole zone

Maximum allowable V-cut

SB

For TJI® joists with slopes of 10/12 to 12/12, the vertical depth at bearing will require 11⁄4" TimberStrand® LSL or
iLevel® 11⁄8" rim board (for shear blocking) that is one size deeper than the TJI® joist

Product Storage

Filler and Backer Block Sizes
TJI ®
Depth
Filler Block
(Detail H6)
Backer Block
(Detail H6)
■

110
91⁄ 2" or
14"
117⁄ 8"
2x6
5 ⁄ 8"

2x8
or 3⁄4"

210
91⁄ 2" or
117⁄ 8"
2x6 + 3⁄8"
sheathing
3⁄4"

14" or
16"
2x8 + 3⁄8"
sheathing
or 7⁄ 8"

230 or 360
91⁄ 2" or
14" or
117⁄ 8"
16"
2x6 + 1⁄2"
2x8 + 1⁄2"
sheathing
sheathing
1" net

	If necessary, increase filler and backer block height for face mount hangers and maintain

560

Two
2x6

14" or
16"
Two
2x8

2x6

2x8

117⁄ 8"

Protect products from sun and water
CAUTION:
Wrap is slippery
when wet or icy
Use support blocks at
10' on-center to keep
products out of mud
and water

1⁄8"

gap at top of joist. See
detail W. Filler and backer block dimensions should accommodate required nailing without splitting. The suggested
­minimum length is 24" for filler and 12" for backer blocks.

See General Notes and nailing requirements on page 18

20

iLevel Trus Joist® TJI® Joist Specifier’s Guide TJ-4000

February 2008

roof load tables
Roof—115% and 125% Load Duration (PLF) for 6'–16' Spans
Depth

91⁄ 2"

117⁄ 8"

14"

16"

TJI ®

110
210
230
110
210
230
360
560
110
210
230
360
560
210
230
360
560

6'
Total Load
Snow
115%
289
321
360
289
321
360
368
449
289
321
360
368
449
321
360
368
449

NonSnow
125%
314
349
392
314
349
392
400
488
314
349
392
400
488
349
392
400
488

8'
Total Load

Defl.
Live
Load
L/240
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*

Snow
115%
218
242
272
218
242
272
277
338
218
242
272
277
338
242
272
277
338

NonSnow
125%
237
263
295
237
263
295
301
368
237
263
295
301
368
263
295
301
368

Roof Joist Horizontal Clear Span
10'
12'
Total Load
Defl.
Total Load

Defl.
Live
Load
L/240
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*

NonSnow
125%
159
176
198
159
176
198
202
246
159
176
198
202
246
176
198
202
246

Live
Load
L/240
155
*
196
*
*
*
*
*
*
*
*
*
*
*
*
*
*

Roof Joist Horizontal Clear Span
22'
24'
Total Load
Defl.
Total Load

Defl.

Snow
115%
175
194
218
175
194
218
223
272
175
194
218
223
272
194
218
223
272

NonSnow
125%
190
211
237
190
211
237
242
295
190
211
237
242
295
211
237
242
295

Live
Load
L/240
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*

Defl.

Snow
115%
146
162
182
146
162
182
186
227
146
162
182
186
227
162
182
186
227

14'
Total Load
Snow
115%
109
131
145
125
139
156
159
195
125
139
156
159
195
139
156
159
195

NonSnow
125%
118
142
158
136
151
170
173
212
136
151
170
173
212
151
170
173
212

Defl.
Live
Load
L/240
101
118
128
*
*
*
*
*
*
*
*
*
*
*
*
*
*

16'
Total Load
Snow
115%
83
100
112
106
122
137
140
170
110
122
137
140
170
122
137
140
170

NonSnow
125%
91
108
118
115
132
149
152
185
119
132
149
152
185
132
149
152
185

Defl.
Live
Load
L /240
69
81
88
*
*
146
*
*
*
*
*
*
*
*
*
*
*

Roof—115% and 125% Load Duration (PLF) for 18'–28' Spans
Depth

91⁄ 2"

117⁄ 8"

14"

16"

TJI ®

110
210
230
110
210
230
360
560
110
210
230
360
560
210
230
360
560

18'
Total Load

20'
Total Load

Defl.

Defl.

Snow
115%

NonSnow
125%

Live
Load
L/240

Snow
115%

NonSnow
125%

Live
Load
L/240

77
84
84
101
112
124
152
98
108
122
124
152
108
122
124
152

77
84
91
109
121
135
165
106
118
132
135
165
118
132
135
165

58
63
82
96
105
*
*
*
*
*
*
*
*
*
*
*

82
91
112
137
80
97
107
112
137
97
110
112
137

89
98
122
148
87
105
117
122
148
106
119
122
148

71
78
103
*
*
103
112
*
*
*
*
*
*

26'
Total Load

Defl.

28'
Total Load

Defl.

Snow
115%

NonSnow
125%

Live
Load
L/240

Snow
115%

NonSnow
125%

Live
Load
L/240

Snow
115%

NonSnow
125%

Live
Load
L/240

Snow
115%

NonSnow
125%

Live
Load
L /240

75
102
124

79
105
135

59
78
117

82
114

82
122

61
91

97

97

73

79

79

59

80
89
102
124
89
100
102
124

87
96
111
135
96
108
111
135

79
86
*
*
*
*
*
*

75
93
114
77
85
93
114

81
101
124
83
93
101
124

67
88
*
*
90
*
*

86
105

94
114

70
104

76
98

76
106

57
85

86
105

79
94
114

72
*
*

80
98

87
106

76
*

* Indicates that Total Load value controls.

Slope Factors
Slope
Factor

21⁄ 2 in 12
1.021

3 in 12
1.031

31⁄ 2 in 12
1.042

4 in 12
1.054

41⁄ 2 in 12
1.068

5 in 12
1.083

6 in 12
1.118

7 in 12
1.158

8 in 12
1.202

How to Use These Tables

General Notes

1.	 Calculate actual total load in pounds per linear foot (plf).

■

2.	Select appropriate Roof Joist Horizontal Clear Span. For slopes greater than 2"
in 12", approximate the increased dead load by multiplying the joist horizontal
clear span by the Slope Factor above.

		
		
		
		

3.	Scan down the column to find a TJI® joist that meets or exceeds actual total load.
Total Load values are limited to deflection of L/180. For stiffer deflection criteria,
use the Live Load L/240 values.

■

9 in 12
1.250

10 in 12
1.302

11 in 12
1.357

12 in 12
1.414

Tables are based on:
– Uniform loads.
– No composite action provided by sheathing.
– More restrictive of simple or continuous span.
– Minimum roof surface slope of 1⁄4" in 12".
Total Load limits joist deflection to L /180.

iLevel Trus Joist® TJI® Joist Specifier’s Guide TJ-4000

February 2008

21

framing connectors (simpson strong-tie®)
Single Joist—Top Flange

Face Mount Skewed 45° Joist Hanger (1)

Single Joist—Face Mount (1)

Joist

Depth
91⁄ 2"

117⁄ 8"

14"

16"

TJI ®

Hanger

110
210
230
110
210
230
360
560
110
210
230
360
560
210
230
360
560

ITS1.81/9.5
ITS2.06/9.5
ITS2.37/9.5
ITS1.81/11.88
ITS2.06/11.88
ITS2.37/11.88
ITS2.37/11.88
ITT411.88
ITS1.81/14
ITS2.06/14
ITS2.37/14
ITS2.37/14
ITT414
ITT2.1/16
MIT3516
MIT3516
MIT416

Nailing
Capacity
(lbs)
Header
Joist
1,365
10d
N.A.
1,365
10d
N.A.
1,365
10d
N.A.
1,365
10d
N.A.
1,365
10d
N.A.
1,365
10d
N.A.
1,365
10d
N.A.
1,300
10d
10d x 11⁄2"
1,365
10d
N.A.
1,365
10d
N.A.
1,365
10d
N.A.
1,365
10d
N.A.
1,300
10d
10d x 11⁄2"
1,300
10d
10d x 11⁄2"
2,115
16d
10d x 11⁄2"
2,115
16d
10d x 11⁄2"
2,115
16d
10d x 11⁄2"

Hanger
IUS1.81/9.5
IUS2.06/9.5
IUS2.37/9.5
IUS1.81/11.88
IUS2.06/11.88
IUS2.37/11.88
IUS2.37/11.88
IUS3.56/11.88
IUS1.81/14
IUS2.06/14
IUS2.37/14
IUS2.37/14
IUS3.56/14
IUS2.06/16
IUS2.37/16
IUS2.37/16
IUS3.56/16

Double Joist—Top Flange

Nailing
Capacity
(lbs)
Header
Joist
935
10d
N.A.
935
10d
N.A.
935
10d
N.A.
1,170
10d
N.A.
1,170
10d
N.A.
1,170
10d
N.A.
1,170
10d
N.A.
1,405
10d
N.A.
1,405
10d
N.A.
1,405
10d
N.A.
1,405
10d
N.A.
1,405
10d
N.A.
1,405
10d
N.A.
1,640
10d
N.A.
1,640
10d
N.A.
1,640
10d
N.A.
1,640
10d
N.A.

SUR/L1.81/9
SUR/L2.1/9
SUR/L2.37/9
SUR/L1.81/11
SUR/L2.1/11
SUR/L2.37/11
SUR/L2.37/11
SUR/L410
SUR/L1.81/14
SUR/L2.1/11
SUR/L2.37/14
SUR/L2.37/14
SUR/L414
SUR/L2.1/11
SUR/L2.37/14
SUR/L2.37/14
SUR/L414

Variable Slope Seat Connector (2)

Double Joist—Face Mount (1)
Joist

Joist

Depth
91⁄ 2"

117⁄ 8"

14"

16"

TJI®
110
210
230
110
210
230
360
560
110
210
230
360
560
210
230
360
560

Nailing
Capacity
(lbs)
Header
Joist
MIT49.5
2,115
16d
10d x 11⁄2"
MIT4.28/9.5
2,115
16d
10d x 11⁄2"
MIT359.5-2
2,115
16d
10d x 11⁄2"
MIT411.88
2,115
16d
10d x 11⁄2"
MIT4.28/11.88 2,115
16d
10d x 11⁄2"
MIT3511.88-2
2,115
16d
10d x 11⁄2"
MIT3511.88-2
2,115
16d
10d x 11⁄2"
B7.12/11.88
3,355
16d
16d
MIT414
2,115
16d
10d x 11⁄2"
MIT4.28/14
2,115
16d
10d x 11⁄2"
MIT3514-2
2,115
16d
10d x 11⁄2"
MIT3514-2
2,115
16d
10d x 11⁄2"
B7.12/14
3,355
16d
16d
LBV4.28/16
2,460
16d
10d x 11⁄2"
LBV4.75/16
2,460
16d
10d x 11⁄2"
LBV4.75/16
2,460
16d
10d x 11⁄2"
B7.12/16
3,355
16d
16d
Hanger

Variable Slope Seat Joist Hanger (1)(3)

Hanger
MIU3.56/9
MIU4.28/9
MIU4.75/9
MIU3.56/11
MIU4.28/11
MIU4.75/11
MIU4.75/11
HU412-2
MIU3.56/14
MIU4.28/14
MIU4.75/14
MIU4.75/14
HU414-2
MIU4.28/16
MIU4.75/16
MIU4.75/16
HU414-2

Nailing
Capacity
(lbs)
Header
Joist
2,270
16d
10d x 11⁄2"
2,270
16d
10d x 11⁄2"
2,270
16d
10d x 11⁄2"
2,840
16d
10d x 11⁄2"
2,840
16d
10d x 11⁄2"
2,840
16d
10d x 11⁄2"
2,840
16d
10d x 11⁄2"
2,145
16d
16d
3,125
16d
10d x 11⁄2"
3,125
16d
10d x 11⁄2"
3,125
16d
10d x 11⁄2"
3,125
16d
10d x 11⁄2"
2,680
16d
16d
3,410
16d
10d x 11⁄2"
3,410
16d
10d x 11⁄2"
3,410
16d
10d x 11⁄2"
2,680
16d
16d

TJI ®
110
210
230
360
560

Nailing
Hanger Capacity
(lbs)
Header
Joist
VPA25
1,050
10d
10d x 11⁄2"
VPA2.1 1,230
10d
10d x 11⁄2"
VPA35
1,230
10d
10d x 11⁄2"
VPA35
1,230
10d
10d x 11⁄2"
VPA4
1,230
10d
10d x 11⁄2"

Hanger information on these two
pages was provided by either
Simpson Strong‑Tie® or
USP Structural Connectors ®.
For additional information,
please refer to their literature.

General Notes
Bold italic hangers require web stiffeners.

Joist

Capacities will vary with different nailing criteria or other support conditions; contact your iLevel
representative for assistance.

TJI ®

Hanger

110
210
230
360
560

LSSUI25
LSSU2.1
LSSUI35
LSSUI35
LSSU410

Capacity (lbs)
Nailing
Sloped
Sloped and Header
Joist
Only
Skewed
1,110
995
10d
10d x 11⁄2"
1,110
995
10d
10d x 11⁄2"
1,110
995
10d
10d x 11⁄2"
1,110
995
10d
10d x 11⁄2"
2,430
1,625
16d
10d x 11⁄2"

■

	Hanger capacities shown are either joist bearing capacity or hanger capacity—whichever
is less. Joist end reaction must be checked to ensure it does not exceed the capacity shown
in the tables.

■

All capacities are for downward loads at 100% duration of load.

■

Fill all round, dimple, and positive-angle nail holes.

■

Use sloped seat hangers and beveled web stiffeners when TJI® joist slope exceeds 1⁄4" per foot.

■

	Leave 1⁄16" clearance (1⁄8" maximum) between the end of the supported joist and the header or
hanger.

See additional notes on page 23

22

Nailing
Capacity
(lbs)
Header
Joist
1,595
16d
10d x 11⁄2"
1,595
16d
10d x 11⁄2"
2,015
16d
10d x 11⁄2"
2,130
16d
10d x 11⁄2"
2,130
16d
10d x 11⁄2"
2,305
16d
10d x 11⁄2"
2,305
16d
10d x 11⁄2"
1,860
16d
16d
2,500
16d
10d x 11⁄2"
2,130
16d
10d x 11⁄2"
2,590
16d
10d x 11⁄2"
2,590
16d
10d x 11⁄2"
2,395
16d
16d
2,130
16d
10d x 11⁄2"
2,590
16d
10d x 11⁄2"
2,590
16d
10d x 11⁄2"
2,395
16d
16d

Hanger

iLevel Trus Joist® TJI® Joist Specifier’s Guide TJ-4000

February 2008

Framing connectors (usp structural connectors®)
Single Joist—Top Flange

Single Joist—Face Mount (1)

Face Mount Skewed 45° Joist Hanger (1)(4)

Joist

Depth
91⁄ 2"

117⁄ 8"

14"

16"

TJI ®

Hanger

110
210
230
110
210
230
360
560
110
210
230
360
560
210
230
360
560

THO17950
TFL2095
TFL2395
THO17118
TFL20118
TFL23118
TFL23118
THO35118
THO17140
TFL2014
TFL2314
TFL2314
THO35140
TFL2016
TFL2316
TFL2316
THO35160

Nailing
Capacity
(lbs)
Header
Joist
950
10d
10d x 11⁄2"
1,045
10d
10d x 11⁄2"
1,095
10d
10d x 11⁄2"
950
10d
10d x 11⁄2"
1,045
10d
10d x 11⁄2"
1,095
10d
10d x 11⁄2"
1,145
10d
10d x 11⁄2"
1,430
10d
10d x 11⁄2"
1,215
10d
10d x 11⁄2"
1,045
10d
10d x 11⁄2"
1,095
10d
10d x 11⁄2"
1,145
10d
10d x 11⁄2"
1,430
10d
10d x 11⁄2"
1,045
10d
10d x 11⁄2"
1,095
10d
10d x 11⁄2"
1,145
10d
10d x 11⁄2"
1,430
10d
10d x 11⁄2"

Double Joist—Top Flange

Hanger
THF17925
THF20925
THF23925
THF17112
THF20112
THF23118
THF23118
THF35112
THF17140
THF20140
THF23140
THF23140
THF35140
THF20157
THF23160
THF23160
THF35157

Nailing
Capacity
(lbs)
Header
Joist
910
10d
10d x 11⁄2"
910
10d
10d x 11⁄2"
1,220
10d
10d x 11⁄2"
910
10d
10d x 11⁄2"
910
10d
10d x 11⁄2"
1,220
10d
10d x 11⁄2"
1,265
10d
10d x 11⁄2"
1,460
10d
10d x 11⁄2"
950
10d
10d x 11⁄2"
1,045
10d
10d x 11⁄2"
1,220
10d
10d x 11⁄2"
1,265
10d
10d x 11⁄2"
1,460
10d
10d x 11⁄2"
1,400
10d
10d x 11⁄2"
1,220
10d
10d x 11⁄2"
1,265
10d
10d x 11⁄2"
1,460
10d
10d x 11⁄2"

91⁄ 2"

117⁄ 8"

14"

16"

SKH1720L /R
SKH2020L /R
SKH2320L /R
SKH1720L /R
SKH2020L /R
SKH2320L /R
SKH2320L /R
SKH410L /R
SKH1720L /R
SKH2020L /R
SKH2324L /R
SKH2324L /R
SKH414L /R
SKH2024L /R
SKH2324L /R
SKH2324L /R
SKH414L /R

Nailing
Capacity
(lbs)
Header
Joist
915
10d
10d x 11⁄2"
1,015
10d
10d x 11⁄2"
1,065
10d
10d x 11⁄2"
915
10d
10d x 11⁄2"
1,015
10d
10d x 11⁄2"
1,065
10d
10d x 11⁄2"
1,110
10d
10d x 11⁄2"
1,460
16d
16d
915
10d
10d x 11⁄2"
1,015
10d
10d x 11⁄2"
1,065
10d
10d x 11⁄2"
1,110
10d
10d x 11⁄2"
1,460
16d
16d
1,015
10d
10d x 11⁄2"
1,065
10d
10d x 11⁄2"
1,110
10d
10d x 11⁄2"
1,460
16d
16d
Variable Slope Seat Connector (5)

Double Joist—Face Mount (1)
Joist

Joist

Depth

Hanger

TJI®

Hanger

110
210
230
110
210
230
360
560
110
210
230
360
560
210
230
360
560

THO35950
THO20950-2
THO23950-2
THO35118
THO20118-2
THO23118-2
THO23118-2
BPH71118
THO35140
THO20140-2
THO23140-2
THO23140-2
BPH7114
THO20160-2
THO23160-2
THO23160-2
BPH7116

Nailing
Capacity
(lbs)
Header
Joist
2,050
10d
10d x 11⁄2"
2,330
16d
10d
2,680
16d
10d
2,050
10d
10d x 11⁄2"
2,330
16d
10d
2,680
16d
10d
2,770
16d
10d
3,185
16d
10d
2,100
10d
10d x 11⁄2"
2,330
16d
10d
2,680
16d
10d
2,770
16d
10d
3,185
16d
10d
2,330
16d
10d
2,680
16d
10d
2,770
16d
10d
3,185
16d
10d

Hanger
THF35925
THF20925-2
THF23925-2
THF35112
THF20112-2
THF23118-2
THF23118-2
HD7120
THF35140
THF20140-2
THF23140-2
THF23140-2
HD7140
THF20140-2
THF23160-2
THF23160-2
HD7160

Nailing
Capacity
(lbs)
Header
Joist
1,370
10d
10d x 11⁄2"
1,390
10d
10d
1,625
10d
10d
1,825
10d
10d x 11⁄2"
1,855
10d
10d
1,855
10d
10d
1,855
10d
10d
2,240
16d
10d
2,165
10d
10d x 11⁄2"
2,320
10d
10d
2,435
10d
10d
2,500
10d
10d
2,800
16d
10d
2,320
10d
10d
2,435
10d
10d
2,530
10d
10d
2,920
16d
10d

TJI ®
110
210
230
360
560

Nailing
Hanger Capacity
(lbs)
Header
Joist
TMP175
1,150
10d
10d x 11⁄2"
TMPH175 1,485
10d
10d x 11⁄2"
TMP21
1,290
10d
10d x 11⁄2"
TMPH21
1,565
10d
10d x 11⁄2"
TMP23
1,460
10d
10d x 11⁄2"
TMPH23
1,580
10d
10d x 11⁄2"
TMP23
1,505
10d
10d x 11⁄2"
TMPH23
1,630
10d
10d x 11⁄2"
TMP4
1,725
10d
10d x 11⁄2"
TMPH4
1,855
10d
10d x 11⁄2"

Variable Slope Seat Joist Hanger (1)(3)

Support Requirements
■

	Support material assumed to be iLevel® engineered lumber or sawn lumber (Douglas fir or southern
pine species).

■

Minimum support width for single- and double-joist top mount hangers is 3" (11⁄2" for ITT hangers).

■

Minimum support width for face mount hangers with 10d and 16d nails is 13⁄4" and 2", respectively.

Footnotes:
(1)	Face mount hanger capacities may be increased up to 15% for snow roofs or 25% for non-snow roofs. Maximum
increase for LSSU, LSSUI, and LSSH hangers is 15%.
(2) VPA connectors are allowed on slopes of 3/12 through 12/12 only.
(3)	LSSU, LSSUI and LSSH hangers can be field adjusted for slopes and skews of up to 45 degrees. Additional lateral
restraints are required for 16" deep TJI® joists.
(4) Miter cut is required at end of joist.
(5)	TMP connectors are allowed on slopes of 1/12 through 6/12 only, and TMPH connectors are allowed on slopes of
6/12 through 12/12 only.

Joist

TJI ®

Hanger

110
210
230
360
560

LSSH179
LSSH20
LSSH23
LSSH23
LSSH35

Capacity (lbs)
Nailing
Sloped Sloped and Header
Joist
Only
Skewed
1,140
1,140
10d
10d x 11⁄2"
1,140
1,140
10d
10d x 11⁄2"
1,140
1,140
10d
10d x 11⁄2"
1,140
1,140
10d
10d x 11⁄2"
1,590
1,590
16d
10d x 11⁄2"

See General Notes on page 22
iLevel Trus Joist® TJI® Joist Specifier’s Guide TJ-4000

February 2008

23

ROOF SOLUTIONS

FLOOR SOLUTIONS

WE CAN HELP YOU BUILD SMARTER.
At iLevel, our goal is to help you build solid and durable homes by providing high-quality residential building
products and unparalleled technical and field support.
Floors and Roofs: Start with the best framing components in the industry: our iLevel® Trus Joist® Silent Floor®
joists; TimberStrand® LSL rim board; and TimberStrand® LSL, Microllam® LVL, and Parallam® PSL headers and beams.
Pull them all together with our durable iLevel® Structurwood® roof sheathing and self-gapping Structurwood Edge®
or Structurwood Edge Gold® floor panels.
Walls: Get the best value out of your framing package—use TimberStrand® LSL studs for tall walls, kitchens,
and bathrooms, and our traditional, solid-sawn lumber everywhere else. Cut down installation time by using
TimberStrand® LSL headers for doors and windows, and our Structurwood® wall sheathing with its handy two-way
nail lines.
Software Solutions: If you are a design professional or lumber dealer, iLevel offers a full array of software packages
to help you specify individual framing members, create cut lists, manage inventories—even help you design
whole-house framing solutions. Contact your iLevel representative to find out how to get the software you need.
Technical Support: Need technical help? iLevel has one of the largest networks of engineers and sales
representatives in the business. Call us for help, and a skilled member from our team of experts will contact you
within one business day to evaluate and help solve your structural frame problems—GUARANTEED.

CONTACT US

OUR GUARANTEE

1.888.iLevel8 (1.888.453.8358)
www.iLevel.com
iLevel@weyerhaeuser.com
2910 East Amity Road
Boise, ID 83716
208.364.3600
P.O. Box 8449
Boise, ID 83707-2449

February 2008
Reorder TJ-4000
This document supersedes all
previous versions. If this is more
than one year old, contact your
dealer or iLevel rep.
NW

Weyerhaeuser, iLevel®, Microllam®, Parallam®, Silent Floor®, Structurwood®, Structurwood Edge®,
Structurwood Edge Gold®, TimberStrand®, TJ®, TJ-Beam®, TJI®, TJ-Xpert®, and Trus Joist® are registered
trademarks, and All in One™, Performance Tested™, and TJ-Pro™ are trademarks of Weyerhaeuser.
© 2008 Weyerhaeuser Company. All rights reserved. Printed in the USA.



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Format                          : application/pdf
Creator                         : iLevel
Description                     : Support for design professionals who want to specify TJI joists in all markets (with TJI 210 and 230 joists).
Title                           : TJI 110, 210, 230, 360, and 560 Joist Specifier's Guide
Subject                         : TJI joist, SilentFloor, silent floor, joist, joists, i-joist, i-joists, floor, floors, roof, roofs, framing, specifier, span, spans, load, loads, floor performance, framing connectors, hanger, hangers
Producer                        : Adobe PDF Library 8.0
Trapped                         : False
Region                          : United States
Language                        : English
Type                            : Design/Specification
Reorder                         : TJ-4000
Segment                         : Residential
Page Count                      : 24
Author                          : iLevel
Keywords                        : TJI joist, SilentFloor, silent floor, joist, joists, i-joist, i-joists, floor, floors, roof, roofs, framing, specifier, span, spans, load, loads, floor performance, framing connectors, hanger, hangers
Warning                         : [Minor] Ignored duplicate Info dictionary

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