O-1954-476 - Laserfiche WebLink

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. . -l.42 - SECTION/37 . CIIDNEYS, FLUES AND VENTS. I. - Flue connecti ons 'required. Every heating apparatus or heat ,. .4t producing appliance requiring a flue connection shall be connected with a flue conforming to the provisior..s of this section or of section 38. This shall not include electric ~ppliancef'; gas appliances, except as specifically required in section 38, nor oil firE~d appliances especially designed for use without flue comection. 2. USE OF NONCONFORMING FLUES. Flues not conforming to the re- quirements of this section for chinmeys, nor with generally accepted good practice for metal smokestacks, nor VIi. th section 38, vents f or gas appliances, shall n,ot be used unless l:_sted by Underwriters r Laboratories, Inc., and in- , stalled in full compliance with the lis~ing and the manufacturer 's instructions, and such use is approved b:{ the bUilding official. 3. CONSmUCTION . (a) Chimneys sh,ul extend at least 3 feet above the highest point where they pass through thB roof of the buil~ng and at least 2 feet higher than any ridge within 10 ft:!et of such chinmey. (b) No chinmey .3hall be corbeled from a wall more than 6 inches; nor s hall a chinmey be cor")eled from a wall which is less than 12 inches in thiclmess unless it projects equally on each side of the wall; provided that in the second story of 2-story dwellings corbelling of chinmeys on the exterior of the enclosing walls may equal the l'lJ'all thicmess. In every case the cor- , beling shall not exceed on3 inch projection !:or each course of brick projected. (c) No change i:1 the size or shape of a chinmey, where the chiIlxney passes through the roof, s:J.all be made within a distance of 6 inches above or below the roof joists or rafters. 4. CHIMNEIS FOR HEATING APPLIANCES, LON HEAT INDUSTRIAL APPLIANCES AND FOR TABLE INCDJmA roRS. (a) Chimneys for stoves, coolci.ng ranges, warm air, hot water and low pressure steam. heating furnaces,' fireplaCes" and low heat industrial appli- ances, other than chimneys for incinerators of nonportable type, shall be con- struction of solid masonry' units or of reinforced concrete. The walls shall be properly bonded or tied with corrosion resistant metal anchors. In dw'ellings t and buildings of like heating requirements the thickness of the chimney vfalls shall be not less than 4 inches. In other buildings the thickness shall be mt less than 8 inches, except that rubble stone masonry shall be not less than 12 inches thick.