Wall construction, Apa sturd-i-wall – Georgia-Pacific APA Engineered Wood Construction Guide - Walls User Manual
Page 4
ENGINEERED WOOD CONSTRUCTION GUIDE
■
FORM NO. B360P
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© 2011 APA – THE ENGINEERED WOOD ASSOCIATION
■
WWW.APAWOOD.ORG
45
WALL CONSTRUCTION
Building codes require that walls resist wind pressures caused by the design wind speeds, resist wall-racking forces
and provide weather protection. This section provides details on how wood structural panels can be used to meet these
fundamental requirements.
APA Sturd-I-Wall
®
The APA Sturd-I-Wall system consists of APA RATED SIDING (panel or lap) applied direct to studs or over nonstruc-
tural fiberboard, gypsum or rigid foam insulation sheathing*. Nonstructural sheathing is defined as sheathing not
recognized by building codes for meeting both bending and racking strength requirements.
TABLE 19
FASTENING APA RATED SIDING (PANEL) APPLIED DIRECT-TO-STUDS OR OVER NONSTRUCTURAL
SHEATHING
(a)(b)(c)(d)(e)
APA Rated
Panel Siding
Minimum Nail
(f)
Wall Stud
Spacing
(in. o.c.)
Panel Nail Spacing
Maximum Wind Speed (mph)
Shank
Diameter
(in.)
Penetration
in Framing
(in.)
Edges
(g)
(in. o.c.)
Intermediate
Supports
(in. o.c.)
Wind Exposure Category
B
C
D
3/8 Performance
Category
APA MDO
GENERAL
APA Rated Siding
16 oc
APA Rated Siding
24 oc
0.113
1.5
16
6
12
110
90
90
6
140
120
110
24
6
12
90
NP
NP
6
130
110
100
2.0
16
6
12
125
105
90
6
140
120
110
24
6
12
100
85
NP
6
140
120
110
(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
. Stud specific gravity = 0.42.
(b) Recommendations of siding manufacturer may vary.
(c) For use as wood structural panel wall bracing, the minimum
fastener spacing of 6" o.c. at panel edges and 12" o.c. at interme-
diate supports shall be sufficient except:
(1) For braced wall section with Performance Category 3/8 panel
siding applied horizontally over studs 24" o.c., space nails
3" o.c. along panel edges.
(d) Hot-dip galvanized nails are recommended for most siding
Siding Fasteners section on page 48
for more
information.
(e) Maximum stud spacing shall be in accordance with
Table 21A
.
(f) See
Table 5, page 14
, for nail dimensions.
(g) Supported panel joints shall occur approximately along the center-
line of framing with a minimum bearing of 1/2". Fasteners shall
be located 3/8" from panel edges. Siding installed over two or
more spans.
* Where panel siding is applied over foam sheathing, see APA publication