The original post: /r/diy by /u/Calabris on 2024-11-11 05:06:58.

So my floor in dining/living room are a bit bouncy. I wanted to run a pair of 2x10x20 glued and nailed together to make a 4x10x 20 with three posts under it support the floor better. Problem is I cannot get a 20ft boards into the crawlspace. Would a pair of 2x10x10 nailed and glued to make a 4x10x10 with two posts on either end and then another setup the same as the first spanning the 2nd 10 feet work just as well? So 20 ft supported with 4 posts instead of three. But two independent 10 ft spans instead of a single 20 ft span.