1917 (#619-628) - Laserfiche WebLink

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189 used with masonry construction, shall have a bearing of not less than g" in length and the total load on such bearings shall not exceed 500 lbs. per squ~re inch. A bond of at least No.16 galvanized iron netting not over 1/4" mesh, 2 inches less than the width of the wall, shall be placed two courses below each tier of floor and ceiling joist of each building over three stories in height, and run around the entire walls of the build- and lap full width at intersectionS. The ends of all wood floor and roof beams where they rest on brick walls shall be cut with a bevel of 3" in their depth. The walls between Joists must be carried up solidly, full width to the top of the joists and each wood beam entering the masonry wall must be separated from any other be~zs entering such a wall, by at least 8 inches of solid masonry. Party walls shall not be less than 4½ inches thicker than required for external walls in the preceding tables, or walls may be built of a thickness required in the tables and the corbeled ledges be built out to carry the joists. In $~se the wa/lis corbeled the corbelling shall be carried to the top of the joist. Walls built before the passage of this Ordinance and used or to be used as party walls, and whose thickness at the time of their erection was in accordance with the requ~ements of the then existing laws, which do not now meet the requirements of this Ordinance, may be used if in good condition for the ordinary use of party walls, provided that the height of the building is not increased, and it can be shown to the satisfac tion of the building inspector that such walls shall carry the load to be placed thereon. All exterior party walls over 15' high she/1 have parapet walls not less than g" in thickness carried 2' above the roof. For warehouses, factories, stores and other buildings used for commercial or manufacturing purposes, the parapet wall shall be not less than 12 inches in thickness, and all party and division walls shall be carried 3' over the roof. Parapet walls must be laid in cement mortar and properly coped, and where such walls extend over ~ times their thickness above the roof, they shall be securely braced with iron braces not less than 3/4" in diameter, and every 12' in length of wall. Every opening in a masonry wall shall have an arch of masonry or lintel of stone or reinforced concrete or iron or steel, In Class B buildings, openings lees than 6' in width may have wooden lintels on the inside with relieving arches above. The design and calculation for all arches and lintels shall be subject to the approval of the building inspector. No feces for any pipe shall be made in any wall more than one third of its thickness. No recess shall be made nearer than 6 ft. to any recess in the same wall. No horimontal recess or chase in any wall shall be made exceeding 4' in length. No veneering of brick, stone or terra cotta, on any frame building, shall be over 40 ft. in height, from ground level to upper wall plates. All veneered buildings must be sheathed solid with one inch boards and veneering must be fastened to the building with either 20 d spikes or 1/g inch galvanized bond wires bedded into mortar Joists and well secured to the studding. Such spikes or bonds must be not farther than 12 X 16 inches apart. All walls, piers and girders used as underpinning in Class A, B and C buildings shall be constructed of concrete, hard brick, or steel. The designs, specifications, and calculations for such walls, piers and girders shall be submitted to the build- ing inspector and approved by him before construction shall commence. Ail chimneys and flues hereafter constructed in buildings of two stories or more, shall be of brick or masonry. Flues where wood or coal are used, shall be not less than y½ X ?½". Their enclosing walls must be at least 4"thick, and except in dwellings, apartment houses and tenement houses, shall, if less than g" thick, be lined on the inside with burnt olay or Terra Cotta flue lining, not less than 3/4" thick, and such lining shall start at the lowest point where any smoke enters the flue, and shall be continuous to the top. Where flue lining is not required, the inside of the chimney shall be plastered smoothly for the entire height, and on the outside where passing through joists or roof. Terra Cotta or cement flues may be used on one-story cottages, when approved by the building inspector. Chimneys in all buildings (other than one-story resi- dences) must start from concrete base laid on the ground, built plumb from the ground. None but Terra Cotta or iron thimbles shall be used, and plastering must be done directly on the brick or masonry around thimble, or wire lath may be used, but no wood lath.must approach within 5" of any thimble. Top of thimbles must be at least one foot below the ceiling, a~d at lsast 6" from side wall. Flues larger than 200 sq. in. must have walls at least g" thick. Flues larger than 500 sq. in. must have walls at least 12" thick; for a height of 15' above the inlet, and 8" thick the remaining height. Flues larger thaiu 1OO0 sq. in. shall be proportionately increased in sims and shall be lined with fire brick for at least 20' above the inlet. The brick work of the smoke flues of all low pressure boilers, furnaces, bakers' ovens, large cooking ranges, large laundry stoves, and flues used for commercial purposes, shall be at least g" in thickness, and where subjected to high temperatures, mu~t be lined on the inside with well burned olay or Terra Cotta pipe, and shall be properly capped with coping . Where any flue is subjected to a very high temperature the building inspector may require additionally thick walls and a lining of fire brick or other material. Chimneys built outside of frame structures or in light wells thereof, shall be well stayed at intervals of not less than 10'.