CHAPTER 6 WALL CONSTRUCTION

1 Color profile: Generic CMYK printer profile Composite Default screen CHAPTER 6. WALL CONSTRUCTION . design and CONSTRUCTION . Exterior walls of SECTION R601. wood-frame CONSTRUCTION shall be designed and constructed in GENERAL. accordance with the provisions of this CHAPTER and Figures Application. The provisions of this CHAPTER shall con- (1) and (2) or in accordance with AF&PA's trol the design and CONSTRUCTION of all walls and partitions for NDS. Components of exterior walls shall be fastened in accor- all buildings. For strawbale CONSTRUCTION , see Appendix R.

2 Dance with Tables (1) through (4). Structural Requirements. Wall CONSTRUCTION shall be capable of wall sheathing shall be fastened directly to structural framing accommodating all loads imposed according to Section R301 members. Exterior wall coverings shall be capable of resisting >. and of transmitting the resulting loads to the supporting struc- the wind pressures listed in Table (2).Wood structural tural elements. panel sheathing used for exterior walls shall conform to the requirements of Table (3). Compressible floor-covering materials.

3 Com- pressible floor-covering materials that compress more than Studs shall be continuous from support at the sole plate to a 1/ support at the top plate to resist loads perpendicular to the wall. 32 inch ( mm) when subjected to 50 pounds (23 kg). applied over 1 inch square (645 mm) of material and are The support shall be a foundation or floor, ceiling or roof dia- greater than 1/8 inch (3 mm) in thickness in the uncom- phragm or shall be designed in accordance with accepted engi- pressed state shall not extend beneath walls, partitions or neering practice or other methods approved by the building columns, which are fastened to the floor.

4 Official. > Exception: Jack studs, trimmer studs and cripple studs at openings in walls that comply with Tables (1) and SECTION R602 (2). WOOD WALL FRAMING Stud size, height and spacing. The size, height and Identification. Load-bearing dimension lumber for spacing of studs shall be in accordance with Table (5). studs, plates and headers shall be identified by a grade mark of a lumber grading or inspection agency that has been approved Exceptions: by an accreditation body that complies with DOC PS 20. In lieu 1. Utility grade studs shall not be spaced more than of a grade mark, a certification of inspection issued by a lumber 16 inches (406 mm) on center, shall not support grading or inspection agency meeting the requirements of this more than a roof and ceiling, and shall not exceed 8.

5 Section shall be accepted. feet (2438 mm) in height for exterior walls and load-bearing walls or 10 feet (3048 mm) for inte- End-jointed lumber. Approved end-jointed lum- rior nonload-bearing walls. ber identified by a grade mark conforming to Section may be used interchangeably with solid-sawn mem- 2. Studs more than 10 feet (3048 mm) in height bers of the same species and grade. which are in accordance with Table Structural glued laminated timbers. Glued Top plate. Wood stud walls shall be capped with a laminated timbers shall be manufactured and identified as double top plate installed to provide overlapping at corners required in ANSI/AITC and ASTM D 3737.

6 And intersections with bearing partitions. End joints in top plates shall be offset at least 24 inches (610 mm). Joints in Structural log members. Stress grading of struc- plates need not occur over studs. Plates shall be not less than tural log members of nonrectangular shape, as typically 2-inches (51 mm) nominal thickness and have a width at used in log buildings, shall be in accordance with ASTM D least equal to the width of the studs. 3957. Such structural log members shall be identified by the grade mark of an approved lumber grading or inspection Exception: A single top plate may be installed in stud agency.

7 In lieu of a grade mark on the material, a certificate walls, provided the plate is adequately tied at joints, cor- of inspection as to species and grade, issued by a lum- ners and intersecting walls by a minimum 3-inch-by- ber-grading or inspection agency meeting the requirements 6-inch by a (76 mm by 152 mm by of this section, shall be permitted to be accepted. mm) galvanized steel plate that is nailed to each wall or segment of wall by six 8d nails on each side, pro- Grade. Studs shall be a minimum No. 3, standard or vided the rafters or joists are centered over the studs with stud grade lumber.

8 A tolerance of no more than 1 inch (25 mm). The top plate Exception: Bearing studs not supporting floors and may be omitted over lintels that are adequately tied to nonbearing studs may be utility grade lumber, provided the adjacent wall sections with steel plates or equivalent as studs are spaced in accordance with Table (5). previously described. 2011 OREGON RESIDENTIAL SPECIALTY CODE 6-1. 1. M:\data\CODES\STATE CODES\Oregon\2011\Residential\Final VP\ Monday, May 02, 2011 1:58:00 PM. Color profile: Generic CMYK printer profile Composite Default screen WALL CONSTRUCTION .

9 Bearing studs. Where joists, trusses or rafters are Exception: When the entire side of the wall with the notch spaced more than 16 inches (406 mm) on center and the or cut is covered by wood structural panel sheathing. bearing studs below are spaced 24 inches (610 mm) on cen- ter, such members shall bear within 5 inches (127 mm) of Headers. For header spans see Tables (1) and the studs beneath. (2). Exceptions: Wood structural panel box headers. Wood structural panel box headers shall be constructed in accor- 1. The top plates are two 2-inch by 6-inch (38 mm by dance with Figure and Table 140 mm) or two 3-inch by 4-inch (64 mm by 89 mm).

10 Members. Nonbearing walls. Load-bearing headers are not required in interior or exterior nonbearing walls. A single 2. A third top plate is installed. flat 2-inch-by-4-inch (51 mm by 102 mm) member may be 3. Solid blocking equal in size to the studs is installed used as a header in interior or exterior nonbearing walls for to reinforce the double top plate. openings up to 8 feet (2438 mm) in width if the vertical dis- Bottom (sole) plate. Studs shall have full bearing tance to the parallel nailing surface above is not more than on a nominal 2-by (51 mm) or larger plate or sill having a 24 inches (610 mm).