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Beam SpansFrom: bdkeene@gci.net CommentsI am building a carport. I am going to put in 12" sonotubes and use 4" X 6" uprights. I am going to use a 4"X12" beam for my header. How far apart can I span this size beam? The roof that goes on the 4"X12" ' s will be a 5/12 pitched trussed roof. 
 
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