Roof construction, Apa panel roof sheathing – Georgia-Pacific APA Engineered Wood Construction Guide - Roofs User Manual
Page 4
ENGINEERED WOOD CONSTRUCTION GUIDE
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FORM NO. E30V
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© 2011 APA – THE ENGINEERED WOOD ASSOCIATION
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WWW.APAWOOD.ORG
61
ROOF CONSTRUCTION
APA Panel Roof Sheathing
The recommendations for roof sheathing in Table 30 apply to APA RATED SHEATHING Exposure 1 or Exterior, APA
STRUCTURAL I RATED SHEATHING Exposure 1 or Exterior and APA RATED STURD-I-FLOOR Exposure 1 or
Exterior. Uniform load deflection limits are 1/180 of span under live load plus dead load, and 1/240 under live load
TABLE 30
RECOMMENDED UNIFORM ROOF LIVE LOADS FOR APA RATED SHEATHING
(a)
AND APA RATED STURD-I-FLOOR
WITH STRENGTH AXIS PERPENDICULAR TO SUPPORTS
(b)
Maximum Span (in.)
Allowable Live Loads (psf)
(d)
Panel
Minimum Panel
Spacing of Supports Center-to-Center (in.)
Span
Performance
With Edge
Without Edge
Rating
Category
Support
(c)
Support
12
16 20 24
32 40 48 60
APA RATED SHEATHING
(a)
12/0
3/8
12
12
30
16/0
3/8
16
16
70 30
20/0
3/8
19.2
19.2
120 50 30
24/0
3/8
24
19.2
(e)
190 100 60 30
24/16
7/16
24
24
190 100 65 40
32/16
15/32
32
28
300 165 110 65 30
40/20
19/32
40
32
— 275 195 120 60 30
48/24
23/32
48
36
—
— 270 175 95 45 30
60/32
(f)
7/8
60
40
—
—
— 305 165 100 70 35
60/48
(f)
1-1/8
60
48
—
—
— 305 165 100 70 35
APA RATED STURD-I-FLOOR
(g)
16 oc
19/32
24
24
185 100 65 40
20 oc
19/32
32
32
270 150 100 60 30
24 oc
23/32
48
36
— 240 160 100 50 30 20
32 oc
7/8
48
40
—
— 295 185 100 55 35
48 oc
1-3/32
60
48
—
—
— 290 160 100 65 40
(a) Includes APA RATED SHEATHING/CEILING DECK.
(b) Applies to APA RATED SHEATHING and APA RATED STURD-I-
FLOOR panels 24 inches or wider applied over two or more spans.
(c) Tongue-and-groove edges, panel edge clips (one midway*
between each support, except two equally spaced between sup-
ports 48 inches on center or greater), lumber blocking, or other.
For low slope roofs, see
.
(d) 10 psf dead load assumed.
(e) 19.2 inches for Performance Category 3/8 and 7/16 panels.
24 inches for Performance Category 15/32 and 1/2 panels.
(f) Check with supplier for availability.
(g) Also applies to C-C Plugged grade plywood.
*No established tolerance.