Masonry Magazine February 1980 Page. 30
b. Storage conditions.
c. Dimensions (h/t).
d. Compressive strength of individual prisms.
e. Coefficient of variation (v).
f. Ultimate compressive strength of masonry (f'm) which has been corrected for the coefficient of variation and the h/t of the prisms tested.
PART II PRODUCTS
2.01 BRICK
A. Facing Brick:
1. Delete Note and replace with:
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 Sections 3.02.J and 3.02. Κ.
I. 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).
K. Minimum Ultimate Compressive Strength of Masonry (f'm) psi (kgf/cm²).
2.01.A.1 Grades and Types. Brick subject to the action of weather or soil, but not subject to frost action when permeated with water, shall be of grade MW or grade SW, and where subject to temperature below freezing while in contact with soil shall be grade SW. Brick used in loadbearing or shear wall construction shall comply with the dimensional and distortion tolerances specified for type FBS of ASTM C 216. Where such brick do not comply with these tolerance requirements, the compressive strength of brick masonry shall be determined by prism tests.
3.02.K Ultimate compressive strength as determined by the Structural Engineer may vary for different parts and walls of the building, If so, provide sections to cover all design requirements.