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 16OC as floor joists.
Likewise, is LVL stronger than dimensional lumber? LVL offers several advantages over typical milled lumber: Made in a factory under controlled specifications, it is stronger, straighter, and more uniform. Due to its composite nature, it is much less likely than conventional lumber to warp, twist, bow, or shrink.
Simply so, how far can beams span?
When supporting joists that span 12 feet with no overhang beyond the beam, a double ply beam can span in feet a value equal to its depth in inches. A double 2x12 beam can span 12 feet; a (2) 2x10 can span 10 feet and so on.
What size do LVL beams come in?
Sizes may vary according to manufacturer but Georgia Pacific says LVL standard thicknesses are 1 3/4 inches and 3 1/2 inches. Lengths are generally available in 24, 28, 32, 36, 40 and 44 feet with special orders of up to 60 feet.
