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TABLE 5 OF ARTICLE B <br /> ALLOWABLE SHEAR STRESS FOR TESTED <br /> UNREINFORCED MASONRY WALLS <br /> SHEAR TESTS <br /> Eighty percent of test Average test results Seismic in -plane <br /> results in psi not of cores in psi: shear in psi based <br /> less than: on gross area. <br /> 3 <br /> 30 plus axial stress 20 4 <br /> 40 plus axial stress 27 5 <br /> 50 plus axial stress 33 10 (maximum) <br /> 100 plus axial stress 67 or more <br /> or more <br /> 1 Allowable shear stress may be increased by addition of 10 - <br /> percent of the axial stress due to the weight of the wall <br /> directly above. <br /> 23 <br />