The ends are secured, so how much load can a 6' span of SPF 2×4 support when turned on 3.5"?
At a 6′ span, how much can an SPF 2×4 turned on 3.5″ end support
framingshelving
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Best Answer
The Sagulator says it will support about 375 pounds (evenly distributed) before there is noticeable deflection. I recommend you go to the site, read the notes, and play around with the numbers yourself.