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<br />Design <br /> <br />/., <br /> <br />For additional information on the <br />performance of various building <br />system products, refer to product <br />evaluation reports prepared by the <br />model code groups, <br /> <br />These reference materials or the local building codes will <br />give the designer the necessary truss size, configuration, and <br />connection specifications to resist the expected loadings, <br />and/or will provide loading ratings for specific truss and <br />connection types and sizes, <br /> <br />If the roof trusses and wall connections are not sufficient to <br />resist the increased loading, the design can strengthen these <br />components through the following: <br /> <br />. increase the amount of bracing between the trusses; and/ <br />or <br /> <br />. strengthen the connections with additional plates and <br />additional fasteners, <br /> <br />Upper Level WaDs: The upper level walls are subject to <br />increased wind pressure and increased shear due to in- <br />creased roof loads, Both the short and long walls should be <br />checked against the shear, torsion, tension, and deflection, <br />utilizing the governing loading condition (wind or seismic). <br /> <br />The American Plywood Association has published several <br />references that are useful in this calculation. These include: <br /> <br />. Panel Handbook and Grade Glossary; <br /> <br />. Residential and Commercial; and <br /> <br />. Diaphragms, <br /> <br />These reference materials or the local building codes will <br />give the designer the necessary wall size and configuration <br />and connection specifications to resist the expected load- <br />ings, and/or will provide loading ratings for specific wall <br />types, sizes, and connection schemes. <br /> <br />Engineering Principles and Practices of Retrofitting Flood-Prone Residential Structures <br />January 1995 <br /> <br />VI - E,39 <br />