Masonry Magazine January 1979 Page.22
PART III - EXECUTION
# 3.02 GENERAL ERECTION REQUIREMENTS
Delete Section 3.02.1 in Technical Notes 11B Revised, and replace with the following Section 3.02.1 and add Section 3.02.J.
Lay brick with-in. mortar joints, not to exceed 1/2 in. (12.7 mm).
J. Construction Tolerances:
1. Maximum variation from plumb in vertical lines and surfaces of columns, walls and arrises:
a. 1/4 in. (6.4 mm) in 10 ft. (3 m).
b. 3/8 in. (9.6 mm) in a story height not to exceed 20 ft. (6 m).
c. 1/2 in. (12.7 mm) in 40 ft. (12 m) or more.
2. Maximum variation from plumb for external corners, expansion joints and other conspicuous lines:
a. 1/4 in. (6.4 mm) in any story or 20 ft. (6 m) maximum.
b. 1/2 in. (12.7 mm) in 40 ft. (12 m) or more.
3. Maximum variation from level of grades for exposed lintels, sills, parapets, horizontal grooves and other conspicuous lines:
a. 1/4 in. (6.4 mm) in any bay or 20 ft. (6 m).
b. 1/2 in. (12.7 mm) in 40 ft. (12 m) or more.
4. Maximum variation from plan location of related portions of columns, walls and partitions:
a. 1/2 in. (12.7 mm) in any bay or 20 ft. (6 m).
b. 3/4 in. (19 mm) in 40 ft. (12 m) or more.
5. Maximum variation in cross-sectional dimensions of columns and thicknesses of walls from dimensions shown on drawings:
a. Minus 1/4 in. (6.4 mm).
b. Plus 1/2 in. (12.7 mm).