O-1952-429 - Laserfiche WebLink

Browse Search

than nor more height 111 e '. e . a bond stone shall be secure~nchored to the backing with corro- sion resistant metal anchors with a cross section of not less than 0.2 square inch. There shall be at least 1 anchor to each stone and not less than 2 anchors for each stone more than 2 feet in length and 3 square feet in superficial area. Facing stones not over 12 square feet in area shall have at least 1 anchor to each 4 square feet of super- ficial face area. (h). Piazzas or balconies on dwellings, not exceeding 10 feet in width nor extending more than 3 feet above the second story floor beams; provided that no such structure shall be located nearer than 3 feet to an adjoining lot line or be joined to a similar struc- ture of another building. (i). Coal tipples, ice houses, material bins, trestles and water tanks, when built of planking and timbers of the dimensions specified for heavy timber construction. (j). Fences not exceeding 10 feet '. (k). Display signs as provided i] 9. Solid walls of plain concrete. . (a). Thickness. The minimum thickness of walls of plain con- crete may be 2 inches less than that required for solid masonry walls, but not less than 8 inches, except that 6-inch walls may be used where specifically permitted by subsection 3 (a) (3) of this section. (b). Lateral support. Solid walls of plain concrete shall be supported at right angles to the wall face at intervals not exceeding 20 times the nominal wall thickness. Such lateral support shall conform to subsection 10 of this section. ..1 height. section (c). Reinforcement around openings. Reinforcement sym- metrically disposed in the thickness of the wall shall be placed not less than 1 inch above and 2 inches below openings and extend not less than 24 inches each side of such openings or be of equivalent length with hooks. The reinforcement both above and below shall consist of one %-inch round rod for each 6 inches in wall thickness or fraction thereof. section (1). Roofs over parking lots, of unprotected metal construc- tion, where roof is at least 10 feet above the floor, and every 40 feet there is an open ventilation area 6 feet wide extending either the full length or the full width of the roof. and 12-8(a) 44. . . REQUIRE- OCCUPANCY SPECIAL 11 SECTION MENTS. 10. Lateral support. The lateral support required by subsec- tions 3, 4, 5, 6 and 9 of this section shall be either vertical or hori- zontal. It may be obtained by cross walls, piers, or buttresses, when the limiting distance is measured horizontally, or by floors and roofs when the limiting distance is measured vertically. Sufficient bond- ing or anchorage shall be provided between the walls and the sup- ports to resist the assumed wind force, acting either inward or out- ward. Piers or buttresses relied upon for lateral support shall have sufficient strength and stability to transfer the wind force, acting in either direction to the ground. When walls are dependent upon floors or roofs for their lateral support, provision shall be made in the building to transfer the lateral forces to the ground. 2. (a). Theatres and motion picture theatres shall be of fireproof construction or semi fireproof construction, except that portions of such buildings not over 1 story or over 45 feet in height may have combustible roof construction if protected by fire retardant ceilings. (b). No theatre or motion picture theatre shall be located with- in or attached to a building of other occupancy unless it is sepa- 9 Theatres and motion picture theatres. . f , t II 1 1 SECTION 25. REINFORCED CONCRETE. (a). Average concrete for reinforced concrete shall consist of 1 part portland cement and not more than 6 parts aggregate, by volume measured dry, and not more than 70 gallons of water per sack, 94 pounds, of cement. The aggregate shall be mixed in an approximate ratio of 20 parts fine aggregate and 30 parts coarse aggregate. ' (b). The National Building Code, 1949 Edition, Recommended by the National Board of Fire Undenvriters, shall be deemed to be the generally accepted good practice in reinforced concrete con- struction . 111 AND PARTY WALLS. laid e (d). Outhouses not more than 8 feet 100 square feet in area. (e). Greenhouses not more than 15 feet in height erected on the same lot with and accessory to a dwelling or a store. (f). Sheds open on the long side, not more than 15 feet in height nor more than. 500 square feet in area, located at least 5 feet from buildings and from adjoining lot lines. (g). Builders' shanties for use only in connection with a duly authorized building operation and located on the same lot with such building operation, on a lot immediately adjoining, on an upper floor of the building under construction, or on a sidewalk shed. 1. Institutional buildings. (a). Institutional buildings for occupants involuntarily de- tained or bedridden shall be of fireproof construction or semi- fireproof construction. . (b). Institutional buildings for occupants which are not invol- untarily detained or bedridden, when of other than fireproof construc- tion or semi fireproof construction, shall not exceed 2 stories in height and shall have floors and partitions with fire resistance ratings of not less than one hour and with fire retardant ceilings under roofs, and if of wood frame construction shall not exceed 1 story in height nor 2500 square feet in area; provided that buildings con- verted from another occupancy to such occupancy shall be exempt from these restrictions if sprinklered. be shall masonry of FIRE WALLS walls 28 SECTION 26. 1. Construction. (a). Fire walls and party Type A or Type B mortar.