Microsoft Word - Sec_04100_CA_MortarAndGrout.doc

A good rule of thumb is to specify the weakest mortar that will perform adequately, not the strongest. Per TMS 402, mortar in masonry elements that are part of the seismic force-resisting system in Seismic Design Category D or higher must be Type S or Type M, and masonry cement is not permitted to be used as their cementitious material. ................
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