O-1954-476 - Laserfiche WebLink

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t,-" 1oI" e t , , '-I . -32- (b) Lateral s'.1pport. stone walls shall conform to the requirements for lateral support of o'~her solid masonry walls in subsection 3 of this section. ,(c) Bond. (1) In ashlar masonry" bond stones uniformly distributed shall be provided to the extent 0.1' not less than 10 percent of the area and having not less than 4 inches of bond into the backing masonry. (2) Rubble stc.ne masonry 24 inches or less in thickness shall have bond stones with a maximum spacing of 3 feet vertically and horizontally" and if the masonry is of greater thiclaless than 24 inches shall have one bond stone for each 6 square feet of wall surface on both sides and no heBder stone shall be less than 12 inches 10:J.g measured at right angles to the face of the masonry. (d) Natural be is. All stones showing pronounced cleavage shall be laid on their natural bed" except for cornices and other projecting members w'hich shaJ.l have the grain or bedding planes verticaJ. and at right angles to the face of the masonry. 5. VTALlS OF HOlJ..ON MASONRY UNITS. (a) Thickness end height. (1) The minimun. thiclaless of walls of hollow masonry units shall be not less than that required for solid masonry waJ.ls in subseotion 3 of this sec- tion. (2) '\'falls of hollow masonry '\mits shall not exceed ~O feet in height. (b) LateraJ. sup:?ort. V(alls of hollow masonry units shall be supported at right angles to the wall face at invervals not exceeding 18 times the nominal wall thiclaless. Such late]~al support shall conform to subsection 10 of this section. (c) Bond. (1) Hollow masonry units shall have full mortar coverage of the face shells in both the horizont.al and vertical joints-. (2) Where tVlO or more hollow units are us ed to make up the thickness of a wall" the inner and outer courses shall be bonded at vertical intervals" not exceeding 3 feet, by lapping at least 4 inches over the unit below or by lapping with units at least 50 per cent greater in thickness than the unit below at vertical intervals not exceeding 17 inches. (3) Brick facing or lining (vrhich does not include veneering when used in hollow block wal1s 13hall be bonded to the backing in accordance with paragraph (d) of subsection 3 of this section.