9.23.13.5.Braced Wall Panels in Braced Wall Bands

(1) Except as provided in Sentences (2) to (5) and Article 9.23.13.7., braced wall panels shall (a) be located within braced wall bands, (b) extend, as applicable, from the top of the supporting footing, slab or subfloor to the underside of the floor, ceiling or roof framing above, and (c) conform to the spacing and dimensions given in Table 9.23.13.5. (2) In basements or crawl spaces where the perimeter foundation walls extend from the footings to the underside of the supported floor, braced wall bands constructed with braced wall panels shall be spaced not more than (a) 15 m from the perimeter foundation walls, (b) 15 m from interior foundation walls, and (c) 15 m from adjacent braced wall bands constructed with braced wall panels. (See Note A-9.23.13.5.(2)) Table 9.23.13.5. Spacing and Dimensions of Braced Wall Bands and Braced Wall Panels Forming Part of Sentences 9.23.13.4.(1) and 9.23.13.5.(1) Spacing and Dimensions of Braced Wall Bands and Braced Wall Panels(1)(2)(3) Description Seismic and Wind Loads 1.0 ≤ Sa(0.2) ≤ 1.8 or 0.70 < Sa(0.2) < 1.0 0.80 ≤ HWP < 1.2 kPa Maximum distance between centre lines of adjacent braced wall bands measured from the furthest points between centres of the 10.6 m 7.6 m bands Maximum distance between required braced wall panels measured 6.4 m 6.4 m from the edges of the panels Maximum distance from the end of a braced wall band to the edge 2.4 m 2.4 m of the closest required braced wall panel Minimum length of individual braced wall panels: • panel located at the end of a braced wall band where the braced 600 mm wall panel connects to an intersecting braced wall panel • panel not located at the end of a braced wall band or braced wall panel located at the end of a braced wall band where the braced 750 mm wall panel does not connect to an intersecting braced wall panel Minimum total length of all braced wall panels in a braced wall band • supporting 3 floors, light construction 75% of length of braced wall band • supporting 2 floors, heavy construction(4) 75% of length of braced wall band • supporting 2 floors, light construction 40% of length of braced wall band • supporting 1 floor, heavy construction(4) 40% of length of braced wall band • supporting 1 floor, light construction 25% of length of braced wall band • not supporting a floor 25% of length of braced wall band Notes to Table 9.23.13.5.: (1) See Note A-Table 9.23.13.5. (2) All constructions include support of a roof load in addition to the indicated number of floors. (3) See Article 9.23.13.7. for alternative methods of compliance. (4) See Sentence 9.23.13.3.(1) for overall limit on application to heavy construction. (3) Portions of the perimeter of a single open or enclosed space need not comply with Sentence (1), where (a) the roof of the space projects not more than (i) 3.5 m from the face of the framing of the nearest parallel braced wall band, and (ii) the perpendicular plan dimension, (b) that portion of the perimeter structure does not support a floor, (c) the roof of the space is (i) integral with the roof of the rest of the building with framing members not more than 400 mm o.c. where roof sheathing edges are not supported on blocking and not more than 600 mm o.c. where roof sheathing edges are supported on blocking securely fastened between framing members, or (ii) constructed with roof framing not more than 400 mm o.c. where roof sheathing edges are not supported on blocking and not more than 600 mm o.c. where roof sheathing edges are supported on blocking securely fastened between framing members, and fastened to the wall framing, and (See Table 9.23.3.4. and Article 9.23.9.1. for balloon framing) (d) the end-joists or end-rafters for the roof of the space are fastened to a 3-ply, 38 mm × 140 mm built-up column or a 5-ply, 38 mm × 89 mm built-up column that is integral with the wall framing. (See Note A-9.23.13.5.(3)) (4) Walls in detached garages and in accessory buildings serving a single dwelling unit, and the front wall of attached garages serving a single dwelling unit need not comply with Sentence (1) where these walls do not support a floor. (5) Braced wall panels in the braced wall band at the front of an attached garage serving a single dwelling unit need not comply with Sentence (1), provided (a) the maximum spacing between the front of the garage and the back wall of the garage does not exceed 7.6 m, (b) there is not more than one floor above the garage, (c) not less than 50% of the length of the back wall of the garage is constructed of braced wall panels, and (d) not less than 25% of the length of the side walls is constructed of braced wall panels.