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<br />Design <br /> <br />. Determine considerations for sliding snow by examining <br />steep slope on roof or higher roofs, <br /> <br />/~ <br /> <br />Step 2: Calculation oflateralloads. <br /> <br />If the local building code does not <br />cover wind, snow, or seismic <br />issues, refer to ASCE 7, <br /> <br />The calculation of building lateral loads includes wind, <br />seismic, and flood-related loads. One objective of the wind <br />and seismic analysis is to determine which loading condition <br />controls the design of specific structural components, <br /> <br />Wind Analysis: There are no "typical" formulas for <br />houses, since the calculation of wind loads depends upon <br />the building code in use and the size and shaj2eofthe house, <br />The governing building code will clearly spell out the <br />correct procedure to follow. Most procedures are simple <br />and straightforward, Some houses will be more complex <br />due to their shape. However, the general procedure, as <br />illustrated in Chapter IV, is presented below, <br /> <br />. Determine wind speed and pressure by consulting wind <br />maps within the building code, and checking local <br />requirements with the local building official, <br /> <br />. Determine the importance factors and the exposure <br />category. <br /> <br />. Determine wind gust and exposure factors and analyze <br />the building height and shape, whether the wind is <br />parallel or perpendicular to the roof ridge, and whether <br />it is windward or leeward of roofs/walls, <br /> <br />. Determine the wind load. <br /> <br />. Distribute the load to resisting elements based upon the <br />stiffuess of shear walls, bracing, and frames. <br /> <br />VI- E.35 <br /> <br />Engineering Principles and Practices of Retrofitting Flood-Prone Residential Structures <br />January 1995 <br />