O-1954-476 - Laserfiche WebLink

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'e '. , , . e -35- 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 I anchor to each 4 square feet of superficial face area. 9. SOLID \VALIS OF PLAIN CONCRETE. (a) Thickness. Th~ minimum thickness of walls of plain concrete may be 2 inches less than that required for solid masonry walls" but not less than B inches" except that 6-inch walls maY' be used where specifically permitted by subsection 3 (a) (3) of this secti. on. (b) Lateral supp:>rt. Solid vlalls of plain concrete shall be supported at right angles to the w~l face at intervals not exceeding 20 times the nominal 'wall thickness. Such later 9.1 support shall conf orm to subsection 10 of this section. (c) Reinforcemen.~ around openings. Reinforcement symmetrically disposed in the thiclmess of the wall shall be placed not less than 1 inch above and 2 inches below openings and extend nl,t less than 24 inches each side of such openings or be of equivalent length with hooks. The reinforcement both above and beloW shall con- sis t of one SIB-inch .round rod for each 6 inches ill wall thickness or fraction "thereof. 10. LATERAL SUPPORT. The lateral support required by subsections 3" 4" ~)I 6 and 9 of this 'section f:hall be either vertical or horizontal. It may be ob- .~ained by cross walls, pierE, or buttresses, when the limiting distance is measured horizontally, or by floors end roofs when the limiting distance is measured verti- G:eJ.lY. Sufficient bonding or anchorage shall be provided between the walls and the supports to resist the assumed 'V'dnd force, acting either inward or outward. Piers or buttresses relied upon fer lateral support shall have sufficient strength and stabili ty to transfer the ,rind force, acting in either direction to the ground. When '\'lalls are dependent upcn floors or roofs for their lateral support, proviaion shall be made in the building to transfer the lateral forces to the gro1.Uld. SECTION 28. REmFQRCED CONCRETE. (a) Average concrete for reinforced concrete shall consist of 1 part portland cement and not more than 6 parts aggregate, by vol~e measured dry, and not more than 7} gallons of water per sack, 94 pounds of cement. The ageregate shall be mixed in an approximate ratio of 2-l parts fine aggregate and 3i parts coarse aggregate. (b) The National Building Code, 1949 Edition, Recommended by the .National Board of Fire Underwriters, shall be deemed to be the generally accepted good prac- t~ce in reinforced concrete construction. SECTION 29. FJRE '!fALLS AND PARTY WALIS. 1. CQIistruction.