Add Sections B-3306.2.1 and B-3306.2.2 as follows:
B-3306.2.2 Demolition. Where sidewalks and streets are located within the safety zone as defined in Section B-3303.8, the sidewalk and parking and/or traffic lane(s) within the safety zone shall be closed during demolition activities unless, upon approval by a professional engineer, the Department determines that public safety is adequately protected with such sidewalk or lane left open. A permit shall be obtained from the Streets Department prior to such closures.
Delete Section 3306.7 (maintaining the Exceptions) and replace as follows:
B-3306.7 Covered walkways. Covered walkways shall have a minimum clear height of 8 feet (2438 mm) as measured from the floor surface to the canopy overhead. Adequate lighting shall be provided at all times. Covered walkways shall be designed to support all imposed loads. In no case shall the design live load be less than 300 psf (14.4 kN/m
2) for the entire structure.
Exceptions:
1. Covered walkways shall be permitted to support a design live load not less than 150 psf (7.2 kN/m2) when serving a building or structure less than one hundred feet in height, provided there is no construction materials or equipment storage thereon.
2. Roofs and supporting structures of covered walkways for new, light-frame construction not exceeding two stories in height are permitted to be designed for a live load of 75 psf (3.6 kN/m2) or the loads imposed on them, whichever is greater. In lieu of such designs, the roof and supporting structure of a covered walkway are permitted to be constructed as follows:
a. Footings shall be continuous 2-inch by 6-inch (51 mm by 152 mm) members.
b. Posts not less than 4 inches by 6 inches (102 mm by 152 mm) shall be provided on both sides of the roof and spaced not more than 12 feet (3658 mm) on center.
c. Stringers not less than 4 inches by 12 inches (102 mm by 305 mm) shall be placed on edge upon the posts.
d. Joists resting on the stringers shall be not less than 2 inches by 8 inches (51 mm by 203 mm) and shall be spaced not more than 2 feet (610 mm) on center.
e. The deck shall be planks not less than 2 inches (51 mm) thick or wood structural panels with an exterior exposure durability classification not less than 23/32 inch (18.3 mm) thick nailed to the joists.
f. Each post shall be knee braced to joists and stringers by members not less than 2 inches by 4 inches (51 mm by 102 mm); 4 feet (1219 mm) in length.
g. A curb that is not less than 2 inches by 4 inches (51 mm by 102 mm) shall be set on edge along the outside edge of the deck.