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RAINIER <br />1. Summary and Recommendations <br />Rainier Industries Ltd. <br />18375 Olympic Avenue South <br />Tukwilla, WA 98188 <br />425-251-1900 (www.rainier.com) <br />This document, based on technical background information as provided by Rainier Industries Ltd, covers the <br />structural evaluation of the aluminum frame style structure in accordance with U.S. Building Code <br />requirements. The specifications outlined in the Structural Engineering Institute /American Society of Civil <br />Engineers (SEI/ASCE7) "Minimum Design Loads for Buildings and Other Structures" were followed in <br />determining the integrity of the structure. This document is intended to serve as a basis for the acceptability of <br />this temporary, stand-alone, enclosed structure under standard design wind bads at varies levels of exposure <br />(terrain and wind velocities). <br />Lightweight Design Inc. compiled this document based on the existing frame tent system with reference to the <br />applicable building codes in the U.S. This report includes the load cases and combinations used in the <br />analysis and gives an indication as to the wind exposure for which the structure is suitable. Certification of this <br />document only shows that the Professional Engineer of that particular state is in agreement with the report's <br />contents. It does not, however, imply that the structure is generally suitable for use within that state, or that <br />every installation is covered by this report. <br />As this document was compiled based on design information as provided by Rainier Industries Ltd, the summary <br />and recommendations for this structure and contained within this document can only be valid if the structure is <br />erected with original parts and components provided by Rainier Industries Ltd. <br />Computer -aided structural frame analysis were involved in the course of the investigation. Different load <br />combinations were considered to identify the critical aspects of the design. Member and detail checks were <br />established to derive the conclusions for the entire report. <br />Fabric is assumed to be tensioned and directly attached to each arch, and over the whole length of the arch. <br />1.1 Wind Speed Rating <br />• Wind Speed 110 mph, 3-second gust <br />• Exposure Category B (urban and suburban) <br />• Construction Period Period = "More than 5 years" <br />• Velocity Pressure 9h = 15.13 psf at mean roof height, h = 10.35 ft <br />1609.4.3 Exposure categories. An exposure category shall be determined in accordance with the following: <br />Exposure B. Exposure B shall apply where the ground surface roughness condition, as defined by Surface <br />Roughness B, prevails in the upwind direction for a distance of at least 2,600 feet (792 m) or 20 times the <br />height of the building, whichever is greater. <br />Exception: For buildings whose mean roof height is less than or equal to 30 feet (9144 mm), the upwind <br />distance is permitted to be reduced to 1,500 feet (457 m). <br />Exposure C. Exposure C shall apply for all cases where Exposures B or D do not apply. <br />Exposure D. Exposure D shall apply where the ground surface roughness, as defined by Surface <br />Roughness D, prevails in the upwind direction for a distance of at least 5,000 feet (1524 m) or 20 times <br />the building, whichever is greater. Exposure D shall extend inland from the shoreline for a distance of <br />600 feet (183 m) or 20 times the height of the building, whichever is greater. <br />1609A.2 Surface roughness categories. Aground surface roughness within each 45-degree (0.79 rad) sector <br />shall be determined for a distance upwind of the site as defined in Section 1609.4.3 from the categories <br />defined below, for the purpose of assigning an exposure category as defined in Section 1609.4.3. <br />Surface Roughness B. Urban and suburban areas, wooded areas or other terrain with numerous closely <br />spaced obstructions having the size of single-family dwellings or larger. <br />Surface Roughness C. Open terrain with scattered obstructions having heights generally less than 30 <br />feet (9144 mm). This category includes flat open country, grasslands, and all water surfaces in <br />hurricane -prone regions. <br />Surface Roughness D. Flat, unobstructed areas and water surfaces outside hurricane -prone regions. <br />This category includes smooth mud flats, salt flats and unbroken ice. <br />01-Introduction.xmcd 5 of 6 <br />