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Old 05-29-2018, 11:44 AM   #3
Pope & Young
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Join Date: Oct 2006
Location: West of Houston
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Originally Posted by mmoses View Post
For the 16ft span. What size 2x do I need?
A general rule of thumb is 1.5x the nominal size.
2x4 = 6'
2x6 = 9'
2x8 = 12'
2x10 = 15'
2x12 = 18'

Since you're not going to load that member, you could get away with a little less, but I like to overbuild ... I hate nothing more than sagging wood!
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