In all stores, warehouses, and factories over 25 feet in width between walls, there shall be brick partition walls, or girders supported on iron, steel, or wood columns, or piers of masonry.
In all stores, warehouses, or factories, in case iron, steel, or wood girders supported by iron, steel, or wood columns. or piers of masonry, are used in place of brick partition walls, the building may be 75 feet wide and 210 feet deep, when extending from street to street; or, when otherwise located, may cover an area of not more than 8,000 superficial feet. When a building fronts on three streets it may be 105 feet wide and 210 feet deep ; or, if a corner building fronting on two streets, it may cover an area of not more than 12,500 superficial feet; but in no case wider nor deeper, nor to cover a greater area, except in the ease of fireproof buildings. An area greater than herein stated nosy, considering location and purpose, be allowed by the Board of Buildings, when the proposed building does not exceed three stories in height.
Sec. 33. Increased Thicknesses of Walls for Buildings more than 105 Feet in Depth. All buildings, not excepting dwellings that are over 105 feet in depth, without a cross-wall or proper piers or buttresses, shall have the side or bearing walls increased in thickness 4 inches more than is specified in the respective sections of this Code for the thickness of walls, for every 105 feet, or part tgereof that the said buildings are over 105 feet in depth.
See. 34, Reduced Thickness for Interior Walls. In case the walls of any building are less than 25 feet apart, and less than 40 feet in depth, or there are cross-walls which intersect the walls, not more than 40 feet distant, or piers or buttresses built into the walls, the interior walls may be reduced in thickness in just proportion to the number of crosswalls, piers, or buttresses, and their nearness to each other; provided, however, that this clause shall not apply to walls below 50 feet in height, and that no such wall shall be less than 12 inches thick at the top, and gradually increased in thickness by set-offs to the bottom. The Commissioner of Buildings having jurisdiction is hereby authorized and empowered to deride (except where herein otherwise provided for) how much the walls herein mentioned may be permitted to be reduced in thickness. according to the peculiar
ciremnstances of earls case, without endangering the strength and safety of the building.
Sec. 35. One-Story Brick Buildings. Onestony structures not exceeding a height of 15 feet may be built with 8-ineb walls when the bearing walls are not more than 19 feet apart, and the length of the 8-inch bearing walls does not exceed 53 feet. One-story and basement extensions may be built with 8-inch walls when not over 20 feet wide, 20 feet deep, and 20 feet high to dwellings.
See. 36. Inclosnre Walls for Skeleton Structures. Walls of brick built in between iron or steel columns, and supported wholly or in part on iron or steel girders, shall be not less than 12 inches thick for 75 feet of the uppermost height thereof, or to the nearest tier of basins to that measurement, in any building so constructed; and every lower section of 60 feet, or to the nearest tier of beams to such vertical measurement, or part thereof, shall have a thickness of 4 inches more than is required for the section next above it, down to the tier of beams nearest to the curb level; and thence downward the thickness of walls shall increase in the ratio prescribed in section 26, this Code.
Sec. 37. Curtain Walls, Curtain walls built in between piers or iron or steel columns, and not supported on steel or iron girders, shall he not less than 12 inches thick for 60 feet of the uppermost height thereof, or nearest tier of beams to that height, and increased 4 inches for every additional section of 60 feet or nearest tier of beams to that height.
See. 38. Existing Party Walls. Walls heretofore built for or used as party walls, whose thickness at the time of their erection was in areordance with the requirements of the then existing laws, hut which are not in accordance with the requirements of this Code, may be used, if in good condition, for the ordinary uses of party walls, provided the height Of the same be not increased.