O-1954-476 - Laserfiche WebLink

Browse Search

e , , ..' t . e -~- (b) Fireplaces ahall have hearths of brick, stone, tile or other approved noncombustible ma"jerial supported on a fireproof slab or on brick trimmer arches. Such hear'~hs shall ex tend at least 20 inches outside of the chimney breast and not les:3 than 12 inches beyond each side of the fireplace opening along the chimney breast. The combined thiclmess of hearth and support- ing construction shall be not less than 6 inches at any point. (c) 'iooden form:J or centers used in the construction of that part of the supporting construc':;ion which is below the hearth of the fireplace shall be removed when the suppor":;ing cons truction of the hearth is completed. and (d) Spaces betw een the chimney and joists, beams or girders any com bustible materials shall be fires topped by filling with noncombustible material. SECTION 38. FLUI:S AND VENTS FOR. GAS APPLIANCES. 1. FLUE CONNECT~:OOS REQUIRED. Every gas appliance shall be cOImected to an effective flue extencling to the outer air and conforming to the provisions or subsection 2 of this sec:tion, if it is included in any of the following class- ifications, provided that fluch connections shall not be required for industrial appliances of such size of character that the absence of a connection does not constitute a hazard to the occupants: (a) Domestic appliances with input rating in excess of 50,,000 Btu per hour" except domestic gas ranges. (b) Automatically controlled appliances "vith input rating in excess of 5,,000 Btu per' hour, excElpt automatic instantaneous water heaters of the single faucet type" where the sin€:le faucet is attached to and made a part of the appliance. (c) Automatical:.y controlled appliances with input rating less than $,000 Btu per ho'll!', unless equipped with an automatic device to prevE'.nt the es- cape of unburned gas at thE! main burner or burners. The term Itautomatically controlled appliances" used in paragraphs (b) and (c) refers to appli.ances to which the gas supply is automatically turned on and off in accordance w:i.th the demand for heat, but does not include appliances equipped ....r.i.th dflvices or controls governing the supply of gas to the main burner or burners ~Nhic:h cannot automatically reduce the g as supply below 30 per' cent of the input rat~.