NAC452.120. Exterior veneering.

     1. Cut stone or cast stone veneering must be at least 2 inches in thickness for all courses.

     2. Marble veneering must be at least 1 1/2 inches in thickness for all courses.

     3. Terra-cotta veneering must conform to standard practices.

     4. All veneering must be bonded or tied to the structural steelwork and masonry. Corners, belt courses, copings, pilasters, bases, caps, sills, architraves, and other ornamental and special work which may have projecting parts must have sufficient bearing on the walls to balance independent of anchors.

     5. Sills must extend at least 3 inches back of the windowsill and must have a fillet to receive the sills.

     6. All veneering must be anchored by placing anchors with a 1/4-inch diameter at the top of each stone. These anchors must set into seats in the stone at least 1 inch in depth and must extend into the concrete at least 6 inches. The face of the concrete must be at least 3 inches back of the stone unless dowel anchors are used.

     7. All dowel anchor slots must be made of 22-gauge copper-bearing galvanized iron.

     8. There must be two anchors for each stone which are at least 1 1/2 feet long and one anchor for smaller stones. Anchors must be placed not more than 1 foot from the ends of the stone.

     9. All anchors must be dipped in hot asphalt.

     10. Facing closures on crypts are not considered exterior veneering and must be at least seven-eighths of an inch thick.

     [Bd. of Health, part Mausoleum Reg., eff. 7-5-32]