1986-10-02 Plan Review - Laserfiche WebLink

Home Browse Search

PLAN REVIEW - 95 SOUTH BROWN ROAD October 2, 1986 Page 10 102. Vent connectors made of single wall metal pipe shall not pass through any combustible walls unless they are guarded at the point of passage by ventilated metal thimbles. See Sec. 7408 SBC for requirements 103. In an individual duct system, such duct shall be provided with a volume damper with substantial mounting and positive locking device. Sec. 7508 SBC 104. In a trunk system, each branch duct shall be provided with a splitter damper where it leaves the main trunk duct, and with additional splitter dampers if again divided. All dampers shall be provided with positive locking devices. Sec. 7508 SBC 105. Warm air supply ducts shall not be installed for the purpose of heating attached private garages from any forced air system serving habitable areas. Sec. 7508 SBC 106. Supply registers shall be securely fastened to connecting pipe. Return air registers shall have a free area at least equal to the free area of the ducts to which they are connected. Sec. 7509-7510 SBC 107. Underground ducts installations shall be in accordance with SBC 7726. 108. In residential installations the fan or blower housing shall not be directly connected with metal either to the furnace casing or to the return air piping. Canvas strips may be used to make these connections. Motors shall be mounted in such a way that vibration will not be transmitted to duct work or equipment. Sec. 7518 SBC 109. Residential ventilation, all ducts, (range hood ventilation) shall be galvanized iron of not less than #28 gauge. All seams in the duct system shall be tight. Pressure sensitive tape may be used (if approved). Back draft dampers shall be provided near the outlet of the duct. 1/2' mesh screen shall be installed at each exhaust outlet. Ducts passing through unheated spaces shall be insulated with a minimum of one inch of fiber glass insulation. Ducts located in a heated space shall be insulated with one inch of fiber glass insulation for a distance of three feet from the duct outlet. Sec. 7715 SBC 110. Combustion air as required by SBr 7722 shall be provided. Air intakes shall be provided from the exterior of the building.