1917 (#619-628) - Laserfiche WebLink

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All chimneys and flues shall extend 2, above the highest point of a flat roof or fire walls, and at least 18" above the ridge of a peaked roof except when a chimney is 10' from the peak it may be stopped level with the same. If a chimney rises above the roof for more than six times its least dimension, it shall be anchca, ed to the roof with an iron rod or pipe, not less than 1" in diameter, running clear through the chimney and properly secured to it, and all such chimneys shall be laid in cement mortar. Chimneys and stacks connected with steam boilers shall extend not less than 10' above the wood work of the roof of any adjacent roof within 50' and if sawdust and shavings or wood are used for fuel, the chimney shall extend 20' above such roof and be provided with a spark arrestor. Spark arrestors shall be placed upon all chimneys and stacks when deemed necessary by the building inspector for the safety of property or to abate a nuisance. Where a building is situated adjacent to one taller, and it is necessary to oa~ry chimneys to height of taller build- ing the owner of taller building must allow attachment of flue to his building. Chimneys and flues from boilers, r~taurant and hotel ranges, b~kers' ovens and similarly unusually hot flues, must be left exposed to the ceiling of the roof, in which connection is made with the chimney. The building inspector may order a higher chimney when necessary to abate a nuisance or for safety. All fire places and chimney breasts where mantels are used (except gas grates), whether maintained for an ordinary fireplace or not, shall have trimmer arches to support the hearth. Arches shall be of brick, iron or masonry, at least 24# wide, measuring from the face of the chimney breast, must extend clear across the chimney breast. Hearth shall be of fireproof material. All fireplaces with wood mantles, must have the fire place open- ings surrounded with not less than 6" rim of non-combustible material, between the fireplace opening and wood mantle. The backs and jambs of all fireplaces shall be not less than 10" thick of solid masonry, and openings must be lined with at least 2" of fire brick, Terra Ootta or asbestos composition, or if the lining of the fire place opening is of soap stone, tils or cast iron this 2" lining thickness shall be met by filling in with some non-oombus t ibl e mat er i al. All wood beams shall be trimmed away from all flues and chimneys. The trimmer beams shall be not less than 2" from tlw outside of a chimney breast and the header beam not less than 2" from the outside face of the brick or masonry work of theflue. The header beam carrying the tail beams of the floor, and supporting the trimmer arch in front of the fireplace shsdl be not less than 24" from the chimney breast. Section 21. Hollow tile may be used for bearing walls in buildings three stories or less in height, or for enclosure walls of skeleton constructed buildings of any height, where the wall is carried on beams at each story, but not in party walls which must be built solid. Thickness of walls must conform to the following schedule: First Second Third One story 6" Two story g" 6" Three stories 12" 10" 6" Where tile work is exposed to the weather, the outside must either be plastered, or some approved means taken to waterproof it. Where a girder or beam rests upon a wall so that there is a concentrated load of two tons or over, some means must be taken of supporting the end of the girder either by filling the tile solidly or with a concrete or iron plate. No tile shall be loaded to an excess of 150 lbs. per sq. inch of net section in compression, if set on end, or 75 lbs. if set on side, unless a specisl permit shall be issued by the building inspector for some special method of construction. All hollow tile for exterior walls or bearing partitions, must be laid in cement mortar. A bond composed of wire mesh not less than 20 guage for 1/4" mesh, or 16 guage for 1/2" mesh shall be placed the full width of the wail every fourth course. This mesh must be not coarser than 1/2" and of galvanized wire. Where there is a concentrated load, some approved method mu~t be used to take care of the load at that point. Hollow blocks and artificial stone must meet the same requirements as laid down for hollow tile and masonry construction. Artificial stone made of Portland cement and incombustible and fireproof material, may be used as a substitute for any natural stone, provided it will maintain a crushing load of 2000 per sq. ft. of net area. Section 22. All excavations shall be guarded and pro- tooted as to prevent the same from becoming dangerous to persons or p~operty. When necessary precautions must be taken to prevent the caving in of the sides,and the building inspector is hereby given authority to order such to be done when necessary. The depth of ll feet below the adjacent curb level is hereby fixed as the standard depth of foundations. Basement unde~sidewalks must not extend farther from the building than to within 3' of the curb line. Sidewalks shall be designed and eom tructed to sustain a safe live load of 250 lbs. per sq. ft.