How to Guide

Wall Construction
ENGINEERED WOOD CONSTRUCTION GUIDE
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FORM NO. B360P
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© 2011 APA – THE ENGINEERED WOOD ASSOCIATION
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WWW.APAWOOD.ORG
51
TABLE 24
APA RATED SHEATHING APPLIED DIRECT-TO-STUDS
(a)(b)
Minimum Nail
(c)
Minimum
Wood
Structural
Panel Span
Rating
Minimum
Panel
Performance
Category
Wall Stud
Spacing (in.)
Panel Nail Spacing Maximum Wind Speed (mph)
Edges
(in. o.c.)
Field
(in. o.c.)
Wind Exposure Category
Shank
Diameter
(in.)
Minimum
Penetration
(in.) B C D
0.113 1.5
24/0,
Wall-16 and
Wall-24
3/8 16 6 12 110 90 85
24/16,
Wall-24
7/16 16 6
12 110 100 90
6 150 125 110
0.131 1.75
24/16,
Wall-24
7/16
16 6
12 130 110 105
6 150 125 110
24 or less 6 12 110 90 85
(a) Panel strength axis parallel or perpendicular to supports. Three-ply
plywood sheathing with studs spaced more than 16" on center shall
be applied with panel strength axis perpendicular to supports.
(b) Table is based on wind pressures acting toward and away from
building surfaces, at 30-ft height in wall Zone 5 (corners) with
smallest effective area, per Section 6.4.2.2 of ASCE 7-05 and
Section R301.2 of the 2009 IRC, Stud specific gravity = 0.42.
(c) See Table 5, page 14, for nail dimensions.
TABLE 23
APA RATED LAP SIDING APPLIED DIRECT-TO-STUDS OR OVER STRUCTURAL SHEATHING
(a)(b)(c)
Minimum Nail
Shank Diameter
(d)
(in.)
Minimum
Performance
Category
Lap Siding
Fastener Spacing
(in.)
(e)
Lap Siding Width
(in.)
Maximum Wind Speed (mph)
Wind Exposure Category
B C D
0.113 3/8 6
6 130 110 100
8 110 90 85
12 85 NP NP
(a) Table is based on wind pressures acting toward and away from
building surfaces, at 30-ft height in wall Zone 5 (corners) with
smallest effective area, per Section 6.4.2.2 of ASCE 7-05 and
Section R301.2 of the 2009 IRC, Stud specific gravity = 0.42.
(b) Recommendations of siding manufacturer may vary.
(c) Hot-dip galvanized nails are recommended for most siding applica-
tions, see Siding Fasteners section on page 48 for more information.
(d) See Table 5, page 14, for nail dimensions.
(e) Fastener spacing at top edge of lap siding.