How much weight can a 2x12 beam hold?
Keeping this in consideration, how far can you span a 2x12 beam?
A double 2x12 beam can span 12 feet; a (2) 2x10 can span 10 feet and so on.
Beside above, how much weight can a 2x12x20 hold? You'd need some maths to figure out specifics but those 2x12's would hold around 150 pounds per foot x length x spans but then at some point you get into mode of rupture or elastics, dead weight live weight.
Accordingly, what size lumber can span 20 feet?
Re: 20 foot clearspan beam size In that case, you need something like a 12-16" GLULAM or LVL to span the 20' and can use simple 2x8-10 dimensional lumber 16"OC as floor joists.
How much weight can a 2x10 hold?