Enter the force coefficient, or shape factor, for the vessel. This factor takes into account the shape of the structure. This factor is also known as the pressure coefficient, Cq in the UBC Wind code. The acceptable range of input is between 0.5 and 1.2. This can also be seen in the following codes:
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ANSI A58.1, refer to Table 12
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ASCE 7-93, refer to tables 11-14, pages 21-22
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ASCE 7-95, refer to tables 6-6 to 6-10, pages 32-33
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ASCE 7-98, refer to tables 6-9 to 6-13
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ASCE 7-2002, refer to tables 6-18 to 6-22, pages 68-72
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UBC-1997 code, refer to table 16-H.