StrucJoist SJ-15-25-35 (Willamette)

TABLE III

DESIGN PROPERTIES

Joist Series	Joist Depth (inches)	Joist wt. Ibs/ft	Allow- able Moment (ft-lbs)	Max. Shear & End Reaction For 4" Long Bearing	Max. End Reaction For 1-3/4" Bearing	Max. Interm- ediate Reaction (lbs)		Nail Only El (x 10^⁶)	Glue- Nailed El (x 10^⁶)	K (x 10^⁶)
Joist Series	Joist Depth (inches)	Joist wt. Ibs/ft	Allow- able Moment (ft-lbs)	Max. Shear & End Reaction For 4" Long Bearing	Max. End Reaction For 1-3/4" Bearing	No Web Stiffeners	With Web Stiffe- ners^⁽⁷⁾	Nail Only El (x 10^⁶)	Glue- Nailed El (x 10^⁶)	K (x 10^⁶)
SJ-15	9-1/2"	1.90	2770	1125	975	1950	2440	176	199	4.94
SJ-15	11-7/8"	2.10	3710	1425	975	1950	2440	304	340	6.18
SJ-25	9-1/2"	2.11	3260	1125	1060	2120	2570	204	227	4.94
	11-7/8"	2.37	4360	1425	1060	2120	2570	350	387	6.18
	14"	2.60	5360	1550	1060	2120	2570	520	570	7.28
	16"	2.82	6300	1550	1060	2120	2570	716	781	8.32
SJ-35	11-7/8"	2.90	5810	1425	1250	2500	2950	452	489	6.18
	14"	3.07	7130	1550	1250	2500	2950	667	718	7.28
	16"	3.25	8390	1550	1250	2500	2950	913	979	8.32

Notes:

Design properties are based on 2.2E StrucLam LVL flanges.
Glue-nailed El values are for 12" oc spacing and increase for wider joist spacing. Glue-nailed El values apply to floor use only.
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 = 5wl^⁴/384EI + 8M/K = 5wl^⁴/384EI + wl^² /K
w = uniform load in pounds per linear inch
I = effective span in inches
The allowable moment, shear and reactions are for normal duration loading and can be increased in accordance with the code for load duration.
Moment values shown are for non-repetitive use. For joist spacing of 24" o.c. or less, values may be increased 4%.
1-3/4" minimum bearing required at joist ends. 3-1/2" minimum bearing required at intermediate supports.
Option - 5-1/4" bearing without web stiffeners.
Design properties limited to untreated, dry conditions of use and assume lateral support full length of the compression flange.

TABLE IV

Duct Hole Chart Maximum duct hole length

Joist Series	Joist Depth	JOIST SPACING (in. o.c.)
Joist Series	Joist Depth	12	16	19.2	24
SJ-15	All Depths	12"	8"	6"	6"
SJ-25	9-1/2" & 11-7/8"	13"	9"	8"	8"
SJ-25	14" & 16"	9"	8"	8"	8"
SJ-35	All Depths	15"	12"	10"	8"

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-15

9-1/2"

11-7/8"

2'-0"

1'-0"

3'-0"

1'-6"

4'-6"

2'-6"

6'-0"

4'-0"

6'-6"

4'-6"

5'-6"

7'-6"

8'-6"

SJ-25

9-1/2"

11-7/8"

14"

16"

3'-0"

1'-0"

4'-0"

2'-0"

1'-0"

5'-0"

3'-6"

2'-0"

1'-6"

6'-6"

5'-0"

3'-6"

3'-0"

7'-0"

5'-6"

4'-0"

3'-6"

6'-6"

5'-0"

4'-6"

8'-6"

7'-0"

6'-0"

10'-0"

8'-0"

7'-0"

8'-6"

8'-0"

10'-0"

9'-6"

12'-0"

10'-6"

13'-0"

15'-0"

SJ-35

11-7/8"

14"

16"

3'-0"

1'-0"

1'-6"

4'-0"

2'-0"

3'-0"

5'-6"

3'-6"

4'-0"

7'-0"

5'-0"

5'-6"

7'-0"

5'-6"

6'-0"

8'-6"

7'-0"

10'-6"

8'-6"

11'-6"

9'-6"

10'-6"

10'-0"

12'-6"

11'-6"

14'-0"

12'-6"

15'-6"

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" diameter 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.
This table is applicable only for uniformly loaded StrucJoist designed using the roof and floor span tables in this Installation Guide. Contact Willamette Industries for other applications.

StrucJoist - Page 4