PorterSIPs Structural Insulated Panels

ALLOWABLE TRANSVERSE LOADS (PSF)
FOR TYPE A and TYPE C SANDWICH PANELS

Panel A is made of two equal layers of 7/16" APA rated (24/16) OSB.

Panel C is made of a layer of 7/16" OSB APA rated (24/16) and a layer of 19/32" plywood.

Each skin is rated (24/16). Each type has a core of 0.95 pcf minimum density EPS foam adhered to the sheathing with glue and set under pressure.

SANDWICH PANEL DIMENSIONS

Skin Thickness

Core Thickness

Panel Depth

7/16"

3 5/8"

4 1/2"

7/16"

5 5/8"

6 1/2"

7/16"

7 3/8"

8 1/4"

7/16"

9 3/8"

10 1/4"

7/16"

11 3/8"

12 1/4"

Panel span between supports

DEFL. LIMIT

ALLOWABLE TRANSVERSE LOAD

FOR SIMPLE SUPPORTED WALL PANELS

(DEAD + LIVE) psf

7.5 ft

L/180

L/240

L/360

22 s

22 d

32 s

41 s

52 s

63 s

9.5 ft

L/180

L/240

L/360

17 s

25 s

33 s

41 s

49 s

11.5 ft

L/180

L/240

L/360

14 s

21 s

27 s

34 s

40 m

13.5 ft

L/180

L/240

L/360

12 s

11 d

18 s

23 s

29 s

29 m

15.5 ft

L/180

L/240

L/360

10 s

8 d

16 s

15 d

20 s

25 s

22 m

17.5 ft

L/180

L/240

L/360

9 s

6 d

14 s

12 d

18 s

17 d

22 s

17 m

19.5 ft

L/180

L/240

L/360

8 s

7 d

5 d

12 s

10 d

16 s

14 d

20 s

20 d

14 m

21.5 ft

L/180

L/240

L/360

8 s

6 d

4 d

11 s

8 d

14 s

11 s

17 m

16 d

11 m

23.5 ft

L/180

L/240

L/360

6 d

5 d

3 d

10 s

9 d

6 d

13 s

9 d

14 m

14 d

10 m

Notes:
1. Values shown in tables are the allowable wind load.
2. Controlling conditions: "s" shear, "m" moment, "d" deflection.
3. Minimum bearing required is 3 inches.
4. Deflection criteria is L/180 for wall loads.
5. All loads are normal duration loads. No duration factors are allowed.
6. Loadings shown above are mainly limited by the connection details of the panels to the floor.
7. For comparison purposes the following are wind speed conversions:

70 mph = 12.6 psf 80 mph = 16.4 psf 90 mph = 20.8 psf 100 mph = 25.6 psf

Table TW-1 Transverse Loads on Wall Sandwich Panels Updated 4/29/02

ALLOWABLE AXIAL LOADS (PLF)

FOR TYPE A and TYPE C SANDWICH PANELS

Panel A is made of two equal layers of 7/16" APA rated (24/16) OSB.

Panel C is made of a layer of 7/16" OSB APA rated (24/16) and a layer of 19/32" plywood.

Each skin is rated (24/16). Each type has a core of 0.95 pcf minimum density EPS foam adhered to the sheathing with glue and set under pressure.

	SANDWICH PANEL DIMENSIONS
Skin Thickness Core Thickness Panel Depth	7/16" 3 5/8" 4 1/2"	7/16" 5 5/8" 6 1/2"	7/16" 7 3/8" 8 1/4"	7/16" 9 3/8" 10 1/4"	7/16" 11 3/8" 12 1/4"
Transverse wind load (psf)	0	0	0	0	0
Panel clear span	ALLOWABLE AXIAL LOAD (DEAD + LIVE) plf
10	2585	2680	2763	2858	2954
12	2355	2485	2598	2727	2856
14	2126	2289	2432	2595	2758
16	1897	2094	2266	2463	2660
18	1667	1898	2101	2332	2563
20	1438	1703	1935	2200	2465
22	1208	1508	1769	2068	2367
24	979	1312	1604	1937	2270

Notes:
1. Allowable loads are based on axial loads being applied over entire panel thickness.
2. The deflection criteria for the wall panels is L / 240.
3. All values are normal duration loads. No increases for other load durations allowed.
4. Some allowable loads and spans are not totally based on deflection, therefore no
multipliers for other deflection criteria shall be allowed.
5. All listed values are for single span panels with supports at the top and bottom.
6. All axial loads can be applied with a maximum eccentricity equal to one-sixth of the
panel thickness.

Table A-1 Axial Loads on Sandwich Panels Updated 11/19/99