StrucJoist SJ-32-42-55 (Willamette)

TABLE III Design Properties
Joist Series	Joist Depth (inches)	Joist wt. Ibs/ft	Allowable Moment (ft-lbs)	Max. Shear & End Reaction For 4" Long Bearing⁽⁷⁾	Max. End Reaction For 1-3/4" Bearing
SJ-32	9--1/2"	2.5	2470	1125	1090
	11-7/8"	2.9	3300	1425	1200
	14"	3.1	5990	1550	1200
	16"	3.3	7040	1550	1200
SJ-42	9--1/2"	3.4	5150	1125	1125
	11-7/8"	3.7	6890	1425	1280
	14"	3.9	8470	1550	1280
	16"	4.1	9960	1550	1280
SJ-55	11-7/8"	4.0	8870	1800	1400
	14"	4.3	10900	2000	1400
	16"	4.6	12820	2200	1400

Joist Series	Max. Intermediate Reaction (Ibs)		Nail Only El (x 10⁶)	Glue- Nailed El (x 10⁶)	K (x 10⁶)
Joist Series	No Web Stiffeners	With Web Stiffeners⁽⁸⁾	Nail Only El (x 10⁶)	Glue- Nailed El (x 10⁶)	K (x 10⁶)
SJ-32	2180	3000	215	239	4.94
	2500	3000	366	403	6.18
	2500	3000	648	700	7.28
	2500	3000	886	953	8.32
SJ-42	3020	3400	357	382	4.94
	3020	3400	605	644	6.18
	3020	3400	889	941	7.28
	3020	3400	1209	1277	8.32
SJ-55	3375	3850	673	711	8.19
	3375	3850	987	1040	9.66
	3375	3850	1343	1412	11.04

Notes:

1. Glue-nailed El values are for 12" oc spacing and increase for wider joist spacing. Glue-nailed El values apply to floor use only.

2. Both bending and shear deformations shall be considered when computing deflections. For bending deflection, use standard engineering formulae. For shear deflection use 8x bending moment/K.

EXAMPLE: Uniformly distributed load on a simple span joist.

Deflection = 5wl⁴/384EI + 8M/K = 5wl⁴/384EI + wl² /K

w = uniform load in pounds per lineal inch

I = effective span in inches

3. The allowable moment, shear and reactions are for normal duration loading and can be increased in accordance with the code for load duration.

4. Moment values shown are for non-repetitive use. For Joist spacing of 24" oc or less, values may be increased:

7% moment increase for SJ-32 & SJ-42

4% moment increase for SJ-55

5. 1-3/4" minimum bearing required at joist ends. 3--1/2" minimum bearing required at intermediate supports.

6. Design properties limited to untreated, dry conditions of use and assume lateral support full length of the compression flange.

7. Web stiffeners are required at supports when shear exceeds 1550 Ibs.

8. Option - 5-1/4" bearing without web stiffeners.

TABLE IV

Duct Hole Chart Maximum duct hole length
Joist Series	*JOIST SPACING*
Joist Series	12	16	19.2	24
SJ-32 SJ-42 SJ-55	17" 15" 16"	13" 9" 10"	11" 8" 6"	8.5" 8" 5.5"

Notes:

Do not cut or damage flanges.
Duct holes must be located at center of span.
Duct hole is only allowed in longest span of multiple span joists.
This table is valid for residential spans that meet the floor span tables in this product guide.
Other holes are not allowed within three times the duct hole length.
Allowable depth of hole is depth of web minus 1/4".
Do not over cut corners of holes.

TABLE V

ROUND HOLE CHART Minimum distance from face of nearest support to center of hole.

JOIST

HOLE DIAMETER

SERIES

DEPTH

6-1/4"

8-5/8"

10"

10-3/4"

12"

12-3/4"

SJ-32

9-1/2"

11-7/8"

14"

16"

2'-0"

1'-0"

2'-6"

3'-0"

1'-6"

3'-6"

4'-0"

2'-6"

4'-6"

5'-6"

4'-0"

6'-0"

5'-0"

6'-6"

6'-0"

8'-0"

7'-6"

8'-6"

9'-6"

9'-0"

11'-6"

10'-6"

13'-0"

12'-0"

14'-0"

15'-6"

SJ-42

9-1/2"

11-7/8"

14"

16"

4'-6"

4'-0"

6'-0"

5'-6"

7'-6"

7'-0"

9'-6"

8'-6"

9'-6"

11'-0"

12'-0"

11'-6"

12'-0"

12'-6"

13'-6"

14'-0"

15'-0"

17'-0"

18'-6"

SJ-55

11-7/8"

14"

16"

3'-6"

2'-0"

1'-0"

4'-6"

3'-6"

1'-6"

6'-0"

5'-0"

3'-0"

8'-0"

6'-6"

5'-0"

9'-0"

8'-0"

6'-6"

10'-6"

9'-6"

8'-0"

11'-6"

10'-0"

9'-0"

11'-0"

10'-0"

13'-0"

11 '-6"

14'-0"

13'-0"

15'-0"

17'-0"

Notes:

Do not cut or damage flanges.
The clear distance between holes must equal or exceed twice the diameter of the largest hole, or three times the longest side of a rectangular hole.
Except as noted in 1 and 2 above, a 2" hole is permitted to be drilled anywhere.
The longest side of a rectangular hole shall not exceed three-fourths of the allowable round hole diameter.
Table is for all roof and floor spans shown in the span tables of this product guide.

StrucJoist SJ-32-42-55 - Page 4