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I’m planing on building a porch addition on my house, 20′ across the back with 12′ span out, however, searching WWPA web site and other sources I can’t find any rafter span tables that relate to flat roof construction. I’m in Michigan, so I have to accommodate a hefty snow load.
Would appreciate any thoughts.
thanks, Mark.
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I'm planing on building a porch addition on my house, 20' across the back with 12' span out, however, searching WWPA web site and other sources I can't find any rafter span tables that relate to flat roof construction. I'm in Michigan, so I have to accommodate a hefty snow load.
Would appreciate any thoughts.
thanks, Mark.