CRD-C643-01 Standard Test Methods for Compressive Strength of Masonry Prisms
These test methods cover two compression tests of masonry prisms:
Method A−For determining comparative data on the compressive strength of masonry built in the laboratory with either different masonry units or mortar types, or both.
Method B−For determining the compressive strength of masonry built at the job site with the same materials and workmanship to be used, or being used, in a particular structure.