Masonry Magazine February 1980 Page. 25
Technical Notes
on Brick Construction
Brick Institute of America 1750 Old Meadow Road, McLean, Virginia 22102
GUIDE SPECIFICATIONS FOR BRICK MASONRY
PART IV OF V CONTINUED
ENGINEERED BRICK MASONRY
11D
Aug.
1972
INTRODUCTION
This issue of Technical Notes is a continuation of Technical Notes 11C Revised and contains additional sections and statements to be incorporated into the "Guide Specifications for Brick Masonry", Technical Notes 11A Revised and 11B Revised. This will make the guide specifications in those Technical Notes suitable for Engineered Brick Masonry.
The sections contained in these Technical Notes deal primarily with the quality assurance, selection of units, strength and construction tolerances to provide masonry that meets the minimum design requirements for Engineered Brick Masonry.
In the construction of Engineered Brick Masonry, quality control may be maintained in either of two ways: (1) by testing the brick and controlling the mortar which can be done by laboratory tests or by mixing proportions, or (2) by periodic testing of masonry prisms. This Technical Notes covers quality control by method (2), prism testing. Technical Notes 11C covers quality control by method (1), testing brick and control of mortar.
When quality control is maintained by prism tests, the brick masonry strength is determined in accordance with paragraph 4.2.2.1 of the SCPI Standard, "Building Code Requirements for Engineered Brick Masonry". Test prisms are built as the walls are constructed and tested in compression at 7 days or 28 days. If prism tests are used, the quality control requirements of this Technical Notes should be incorporated into the guide specifications in Technical Notes 11A Revised and 11B Revised.
All other sections of the Guide Specifications for Brick Masonry (Technical Notes 11A Revised and 11B Revised) are appropriate for Engineered Brick Masonry.
QUALITY ASSURANCE BASED ON PRISM TESTS
Guide Specification
Notes
PART I-GENERAL
1.02 QUALITY ASSURANCE
Delete sections and notes for 1.02 in Technical Notes 11A Revised, and substitute the following quality control requirements based on prism tests:
A. Prism Tests:
1. Preconstruction Prisms:
a. Build ten prisms:
(1) Of site materials insofar as possible.
(2) Use brick units similar as to color, texture, raw materials, moisture content and coring.
(3) Under same conditions, insofar as possible, as for the structure.
(4) With same bonding, insofar as possible, as for the structure.
(5) With same mortar as for the structure.
(6) With same joint thickness.
(7) With same workmanship.