Installation Guide

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 Table 31.
(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.