Floor Joist. Floor joists are the framing members that support the floor and walls above them. They run horizontally and are usually spaced 12, 16 or 24 inches on-center. They are supported by the ...

Q:I am strengthening my house in the crawl space by putting oriented strand board (OSB) shear panels on the cripple wall from the mudsill to the floor joists. I am wondering if the same ...