Any engineers in the crowd? I"m designing a window seat. The idea is a bench "suspended" in front of the window. I have two floor registers beneath the bench where I'll put some columns to support the bench. Total length of the bench will be about 13 feet.
So the question is: will a 2x4 support a weight of about 500 lbs (two adults) over a 7 foot span with minimal deflection? How about a 2x6?
I found some beam calculators online, but they're above my head.