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(c) Strengtheni~ of Existing Materials. New materials including wood shear walls <br />maybe utilized to strengthen portions of the existing seismic resisting system in <br />the described configurations provided that the stresses do not exceed the values <br />shown in Table 5 of this Article. <br />(d) Alternative Materials. Alternative materials, designs and methods of construction <br />maybe approved by the Building Official in accordance with the provisions of the <br />Uniform Building Code. <br />(e) Minimum Acceptable Quality of Existing Unreinforced Masonry Walls. <br />(1) General Provisions. All unreinforced masonry walls utilized to carry <br />vertical loads and seismic forces parallel and perpendicular to the wall <br />plane shall be tested as specified in this subsection. All masonry quality <br />shall equal or exceed the minimum standards established herein or shall be <br />removed and replaced by new materials. Alternate methods of testing <br />maybe approved by the Building Official. The quality of mortar in all <br />masonry walls shall be determined by performing in-place shear tests or by <br />testing eight inch diameter cores. Alternative methods of testing maybe <br />approved by the Building Official. Nothing shall prevent pointing with <br />mortar of all the masonry wall joints before the tests are first made. Prior <br />to any pointing, the mortar joints must be raked and cleaned to remove <br />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 <br />special inspector. At the conclusion of the inspection, the inspector shall <br />submit a written report to the licensed engineer or architect responsible for <br />the seismic analysis of the building setting forth the result of the work <br />inspected. Such report shall be submitted to the Building Official for <br />approval as part of the structural analysis. All testing shall be performed <br />in accordance with the requirements specified in this subsection by a <br />testing agency approved by the Building Official. An accurate record shall <br />be kept of all such tests and of their locations in the building, and these <br />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 <br />two per wall or line of wall elements resisting a common force, or 1 per <br />1500 square feet of wall surface, with a minimum of eight tests in any <br />case. The exact test or core location shall be determined at the building <br />site by the licensed engineer or architect responsible for the seismic <br />analysis of the subject building. <br />(3) In-Place Shear Tests. The bed joints of the outer wythe of the masonry <br />shall be tested in shear by laterally displacing a single brick relative to the <br />ORDINANCE NO. 2007-030 7 <br />