architecture - engineering - construction
APA - The Engineered Wood Association
APA Residential & Commercial
APA Residential & Commercial - Page 50
APA Residential & Commercial
| TABLE 27 |
| RECOMMENDED
ROOF LOADS (PSF) FOR APA RATED SHEATHING WITH STRENGTH AXIS PARALLEL TO SUPPORTS(e)(f)
(OSB,composite and5-ply/5-layer plywood panels unless otherwise noted) |
| Panel Grade |
Thickness (in.) |
Span Rating |
Maximum Span
(in.) |
Load at Maximum
Span |
| Live |
Total |
| APA |
7/16 |
24/0,24/16 |
24(d) |
20 |
30 |
| STRUCTURAL I |
15/32 |
32/16 |
24 |
35(a) |
45(a) |
| RATED |
1/2 |
32/16 |
24 |
40(a) |
50(a) |
| SHEATHING |
19/32,5/8 |
40/20 |
24 |
70 |
80 |
| |
23/32,3/4 |
48/24 |
24 |
90 |
100 |
| APA RATED SHEATHING |
7/16(b) |
24/0,24/16 |
16 |
40 |
50 |
| 15/32(b) |
32/16 |
24(d) |
20 |
25 |
| 1/2(b) |
24/0,32/16 |
24(d) |
25 |
30 |
| 19/32 |
40/20 |
24 |
40(c) |
50(c) |
| 5/8 |
32/16,40/20 |
24 |
45(c) |
55(c) |
| 23/32,3/4 |
40/20, 4/24 |
24 |
60(c) |
65(c) |
(a) For 4-plywood marked PS 1, reduce load by 15 psf.
(b) Composite panels must be 19/32 inch or thicker.
(c) For composite and 4-ply plywood panels, reduce load by 15 psf.
(d) Solid blocking recommended at panel ends for 24-inch span.
(e) For guaranteed or warranted roofs, contact membrane
manufacturer for acceptable deck.
(f) Provide edge support.
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