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laminated spars...

scottly

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My question from previous, if anyone can hlep with an answer I'd appreciate it....maybe even buy ya a cheese burger.




I have seen some fir spars on the net that appear to be two 1/2" boards that are laminated side-by-side. How strong is this? And what's the point? Is it because the 1/2" dimension is commonly found in home improvement centers?
 

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