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(e) Minimum Acceptable Quality of Existing Unreinforced Masonry Walls <br />(1) General Provisions. All unreinforced masonry walls utilized to carry vertical <br />loads and seismic forces parallel and perpendicular to the wall plane shall be <br />tested as specified in this subsection. All masonry quality shall equal or exceed <br />the minimum standards established herein or shall be removed and replaced by <br />new materials. Alternate methods of testing may be approved by the Building <br />Official. The quality of mortar in all masonry walls shall be determined by <br />performing in -place shear tests or by testing eight inch diameter cores. <br />Alternative methods of testing may be approved by the Building Official. Nothing <br />shall prevent pointing with mortar of all the masonry wall joints before the tests <br />are first made. Prior to any pointing, the mortar joints must be raked and cleaned <br />to remove loose and deteriorated mortar. Mortar for pointing shall be Type S or N <br />except that masonry cements shall not be used. All preparation and mortar <br />pointing shall be done under the continuous inspection of a designated special <br />inspector. At the conclusion of the inspection, the inspector shall submit a written <br />report to the licensed engineer or architect responsible for the seismic analysis of <br />the building setting forth the result of the work inspected. Such report shall be <br />submitted to the Building Official for approval as part of the structural analysis. <br />All testing shall be performed in accordance with the requirements specified in <br />this subsection by a testing agency approved by the Building Official. An <br />accurate record shall be kept of all such tests and of their locations in the building, <br />and these results shall be submitted to the Building Official for approval as part of <br />the structural analysis. <br />(2) Number and Location of Tests. The minimum number of tests shall be two per <br />wall or line of wall elements resisting a common force, or 1 per 1500 square feet <br />of wall surface, with a minimum of eight tests in any case. The exact test or core <br />location shall be determined at the building site by the licensed engineer or <br />architect responsible for the seismic analysis of the subject building. <br />(3) In -Place Shear Tests. The bed joints of the outer wythe of the masonry shall be <br />tested in shear by laterally displacing a single brick relative to the adjacent bricks <br />in that wythe. The opposite head joint of the brick to be tested shall be removed <br />and cleaned prior to testing. The minimum quality mortar in 80 percent of the <br />shear tests shall not be less than the total of 30 psi plus axial stress in the wall at <br />the point of the test. The shear stress shall be based on the gross area of both bed <br />joints and shall be that at which movement of the brick is first observed. <br />(4) Core Tests. A minimum number of mortar test specimens equal to the number of <br />required cores shall be prepared from the cores and tested as specified herein. The <br />mortar joint of the outer wythe of the masonry core shall be tested in shear by <br />placing the circular core section in a compression testing machine with the mortar <br />bed joint rotated 15 degrees from the axis of the applied load. The mortar joint <br />tested in shear shall have an average ultimate stress of 20 psi based on the gross <br />ORDINANCE NO. 2010-018 7 <br />