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WALL CONSTRUCTION
R602.3.5 Braced wall panel uplift load path. Braced 2. Drilling. Any stud shall be permitted to be bored or
wall panels located at exterior walls that support roof raf- drilled, provided that the diameter of the resulting hole
ters or trusses (including stories below top story) shall is not more than 60 percent of the stud width, the edge
5
have the framing members connected in accordance with of the hole is not more than / inch (16 mm) to the edge
8
one of the following: of the stud, and the hole is not located in the same sec-
1. Fastening in accordance with Table R602.3(1) where: tion as a cut or notch. Studs located in exterior walls or
bearing partitions drilled over 40 percent and up to 60
1.1. The ultimate design wind speed does not percent shall be doubled with not more than two succes-
exceed 115 mph (51 m/s), the wind exposure sive doubled studs bored. See Figures R602.6(1) and
category is B, the roof pitch is 5:12 or greater, R602.6(2).
and the roof span is 32 feet (9754 mm) or less.
1.2. The net uplift value at the top of a wall does Exception: Use of approved stud shoes is permitted
where they are installed in accordance with the man-
not exceed 100 plf (146 N/mm). The net uplift ufacturer’s recommendations.
value shall be determined in accordance with
Section R802.11 and shall be permitted to be R602.6.1 Drilling and notching of top plate. Where pip-
reduced by 60 plf (86 N/mm) for each full ing or ductwork is placed in or partly in an exterior wall or
wall above. interior load-bearing wall, necessitating cutting, drilling or
2. Where the net uplift value at the top of a wall notching of the top plate by more than 50 percent of its
width, a galvanized metal tie not less than 0.054 inch thick
exceeds 100 plf (146 N/mm), installing approved (1.37 mm) (16 ga) and 1 / inches (38 mm) wide shall be
1
2
uplift framing connectors to provide a continuous fastened across and to the plate at each side of the opening
load path from the top of the wall to the foundation with not less than eight 10d (0.148 inch diameter) nails
or to a point where the uplift force is 100 plf (146 N/ having a minimum length of 1 / inches (38 mm) at each
1
2
mm) or less. The net uplift value shall be as deter- side or equivalent. The metal tie must extend not less than
mined in Item 1.2. 6 inches past the opening. See Figure R602.6.1.
3. Wall sheathing and fasteners designed to resist com- Exception: Where the entire side of the wall with the
bined uplift and shear forces in accordance with notch or cut is covered by wood structural panel sheathing.
accepted engineering practice.
R602.7 Headers. For header spans, see Tables R602.7(1),
R602.4 Interior load-bearing walls. Interior load-bearing R602.7(2) and R602.7(3).
walls shall be constructed, framed and fireblocked as speci-
fied for exterior walls. R602.7.1 Single member headers. Single headers shall be
framed with a single flat 2-inch-nominal (51 mm) member
R602.5 Interior nonbearing walls. Interior nonbearing or wall plate not less in width than the wall studs on the top
walls shall be permitted to be constructed with 2-inch by 3- and bottom of the header in accordance with Figures
inch (51 mm by 76 mm) studs spaced 24 inches (610 mm) on R602.7.1(1) and R602.7.1(2) and face nailed to the top and
center or, where not part of a braced wall line, 2-inch by 4- bottom of the header with 10d box nails (3 inches × 0.128
inch (51 mm by 102 mm) flat studs spaced at 16 inches (406 inches) spaced 12 inches on center.
mm) on center. Interior nonbearing walls shall be capped
with not less than a single top plate. Interior nonbearing walls R602.7.2 Rim board headers. Rim board header size,
shall be fireblocked in accordance with Section R602.8. material and span shall be in accordance with Table
R602.7(1). Rim board headers shall be constructed in accor-
R602.6 Drilling and notching of studs. Drilling and notch- dance with Figure R602.7.2 and shall be supported at each
ing of studs shall be in accordance with the following: end by full-height studs. The number of full-height studs at
1. Notching. Any stud in an exterior wall or bearing parti- each end shall be not less than the number of studs displaced
tion shall be permitted to be cut or notched to a depth by half of the header span based on the maximum stud spac-
not exceeding 25 percent of its width. Studs in nonbear- ing in accordance with Table R602.3(5). Rim board headers
ing partitions shall be permitted to be notched to a supporting concentrated loads shall be designed in accor-
depth not to exceed 40 percent of a single stud width. dance with accepted engineering practice.
TABLE R602.3.2
SINGLE TOP-PLATE SPLICE CONNECTION DETAILS
TOP-PLATE SPLICE LOCATION
Corners and intersecting walls Butt joints in straight walls
CONDITION
Minimum nails Minimum nails
Splice plate size Splice plate size
each side of joint each side of joint
Structures in SDC A-C; and in SDC 3 6 0.036 (6) 8d box 3 12 0.036 (12) 8d box
D , D and D with braced wall line galvanized steel plate (2 / 0.113) nails galvanized steel plate (2 / 0.113) nails
1
1
0
2
1
spacing less than 25 feet or equivalent 2 or equivalent 2
Structures in SDC D , D and D , with 3 8 by 0.036 (9) 8d box 3 16 0.036 (18) 8d box
2
1
0
braced wall line spacing greater than galvanized steel plate (2 / 0.113) nails galvanized steel plate (2 / 0.113) nails
1
1
or equal to 25 feet or equivalent 2 or equivalent 2
For SI: 1 inch = 25.4 mm, 1 foot = 304.8 mm.
178 2018 INTERNATIONAL RESIDENTIAL CODE ®
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