Joe - This is very

Joe - This is very informative. One question though regarding purlins. When using purlins is the span then calculated to the purlin? For example, you get a 16'3" span with a 2x8 (assuming douglas #2 with 20 live 10 dead). Would you then be able to get a 32' span if you have a purlin in the middle? If no, how then do you calculate the additional span created by adding a purlin.




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