SECTION R602  WOOD WALL FRAMING
Pursuant to the UCC, delete Section R602.3.1 and replace as follows: 374
   R-R602.3.1 Stud size, height and spacing. The size, height and spacing of studs shall be in accordance with Table R602.3.(5).
   Exceptions:
      1.   Utility grade studs shall not be spaced more than 16 inches (406 mm) on center, shall not support more than a roof and ceiling, and shall not exceed 8 feet (2438 mm) in height for exterior walls and load-bearing walls or 10 feet (3048 mm) for interior nonload-bearing walls.
      2.   Where snow loads are less than or equal to 25 pounds per square foot (1.2 kPa), and the ultimate design wind speed is less than or equal to 130 mph (58.1 m/s), 2-inch by 6-inch (38 mm by 14 mm) studs supporting a roof load with not more than 6 feet (1829 mm) of tributary length shall have a maximum height of 18 feet (5486 mm) where spaced at 16 inches (406 mm) on center, or 20 feet (6096 mm) where spaced at 12 inches (304.8 mm) on center. Studs shall be minimum No. 2 grade lumber.
      3.   Exterior load-bearing studs not exceeding 12 feet (3658 mm) in height provided in accordance with Table R-R602.3(6). The minimum number of full height studs adjacent to openings shall be in accordance with Section R602.7.5. The building shall be located in Exposure B, the roof live load shall not exceed 20 psf (0.96 kPa), and the ground snow load shall not exceed 30 psf (1.4 kPa). Studs and plates shall be No. 2 grade lumber or better.
TABLE R-R602.3(6)
ALTERNATE WOOD BEARING WALL STUD SIZE, HEIGHT AND SPACING
 
STUD HEIGHT
SUPPORTING
STUD SPACINGa
ULTIMATE DESIGN WIND SPEED
115 mph
130 mphb
140 mph b
Maximum roof/ floor span c
Maximum roof/ floor span c
Maximum roof/ floor span c
12 ft.
24 ft.
12 ft.
24 ft.
12 ft.
24 ft.
11 ft.
Roof Only
12 in.
2 X 4
2 X 4
2 X 4
2 X 4
2 X 4
2 X 4
16 in.
2 X 4
2 X 4
2 X 4
2 X 6
2 X 4
2 X 6
24 in.
2 X 6
2 X 6
2 X 6
2 X 6
2 X 6
2 X 6
Roof and One Floor
12 in.
2 X 4
2 X 6
2 X 4
2 X 6
2 X 4
2 X 6
16 in.
2 X 6
2 X 6
2 X 6
2 X 6
2 X 6
2 X 6
24 in.
2 X 6
2 X 6
2 X 6
2 X 6
2 X 6
2 X 6
12 ft.
Roof Only
12 in.
2 X 4
2 X 4
2 X 4
2 X 6
2 X 4
2 X 6
16 in.
2 X 4
2 X 6
2 X 6
2 X 6
2 X 6
2 X 6
24 in.
2 X 6
2 X 6
2 X 6
2 X 6
2 X 6
2 X 6
Roof and One Floor
12 in.
2 X 4
2 X 6
2 X 6
2 X 6
2 X 6
2 X 6
16 in.
2 X 6
2 X 6
2 X 6
2 X 6
2 X 6
2 X 6
24 in.
2 X 6
2 X 6
2 X 6
2 X 6
2 X 6
DR
 
For SI: 1 inch = 25.4 mm, 1 foot = 304.8 mm, 1 mph = 0.447 m/s, 1 pound = 4.448 N.
DR = Design Required.
a.   Wall studs not exceeding 16 inches on center shall be sheathed with minimum 1/2-inch gypsum board on the interior and 3/8-inch wood structural panel sheathing on the exterior. Wood structural panel sheathing shall be attached with 8d (2.5" x 0.131") nails not greater than 6 inches on center along panel edges and 12 inches on center at intermediate supports, and all panel joints shall occur over studs or blocking.
b.   Where the ultimate design wind speed exceeds 115 mph, studs shall be attached to top and bottom plates with connectors having a minimum 300-pound lateral capacity.
c.   The maximum span is applicable to both single- and multiple-span roof and floor conditions. The roof assembly shall not contain a habitable attic.
Pursuant to the UCC, delete Section R602.7.5 and Table R602.7.5 and replace as follows: 375
   R-R602.7.5 Supports for headers. Headers shall be supported on each end with one or more jack studs or with approved framing anchors in accordance with Table R602.7(1) or R602.7(2). The full-height stud adjacent to each end of the header shall be end nailed to each end of the header with four-16d nails (3.5 inches × 0.135 inches).
Pursuant to the UCC, delete Sections R602.10 and R602.11 in their entirety and replace as follows:
R-R602.10 Wall bracing requirements. The wall bracing requirements of Sections R602.10 through R602.11.3 of the 2006 International Residential Code shall apply.

 

Notes

374
   Added, Bill No. 180953 (approved January 3, 2019).
375
   Added, Bill No. 180953 (approved January 3, 2019).