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ORDINANCE NS-2182 0~ <br />PAGE 2] <br /> <br /> total taken the shear value shall be reported as zero. <br /> The results of all coring and shear testing shall be <br /> reported. <br /> <br /> (f) Testing of shear bolts. One-fourth (1/4) of all new shear <br />bolts and dowels embedded in unreinforced masonry walls shall be <br />tested by the director using a torque calibrated wrench to the <br />following minimum torques: <br /> <br /> 1/2" diameter bolts or dowels = 40 foot-lbs. <br /> 5/8,' diameter bolts or dowels = 50 foot-lbs. <br /> 3/4" diameter bolts or dowels = 60 foot-lbs. <br /> <br /> No bolts exceeding three-fourths (3/4) inch shall be used. <br />Ail nuts shall be installed over malleable iron or plate washers <br />when bearing on wood and heavy cut washers when bearing on steel. <br /> <br /> (g) Determination of allowable stresses for design methods <br />based on test results. <br /> <br />(1) <br /> <br />Design shear values. Design seismic in-plane shear <br />stresses greater than permitted in Table G shall be <br />substantiated by tests performed as specified in <br />subsections (e) (3) and (4) of section 8-2006. <br /> <br />Design stresses shall be related to test results obtained <br />as noted in Table G. Intermediate values below the <br />maximum may be interpolated. <br /> <br />TABLE G <br /> <br />ALLOWABLE SHEAR STRESS FOR TESTED <br />UNREINFORCED MASONRY WALLS <br /> <br />Eighty per cent <br />by test results <br />in psi not less <br /> than <br /> <br />Average test results <br /> cores in psi <br /> <br />Seismic in-plane <br />shear based on <br />gross area <br /> <br />30 plus axial <br /> stress <br /> <br />20 <br /> <br />3 psi(1) <br /> <br />40 plus axial <br /> stress <br /> <br />26.7 <br /> <br />4 psi(1) <br /> <br />50 plus axial <br /> stress <br /> <br />33.3 <br /> <br />5 psi(1) <br /> <br />100 plus axial <br /> stress or <br /> more <br /> <br /> 67 <br />or more <br /> <br />10 psi <br />maximum(1) <br /> <br />21 <br /> <br /> <br />