Question: . Based on your design, determine the deflection at the midspan of the truss using the principle of virtual work ( a spreadsheet is recommended

. Based on your design, determine the deflection at the midspan of the truss using the principle of
virtual work (a spreadsheet is recommended here as well). The International Building Code limits
roof deflections due to the unfactored live loads (i.e., PL only) to l/180, where l is the length between
supports. Does your truss satisfy this limit? If not, how would you change your design?

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