These span tables tell you the maximum span a floor joist can achieve depending on the anticipated load on the joist. Not all floor joist lumber has the same strength, ...

These span tables tell you the maximum span that a floor joist can achieve depending on the anticipated load on the joist. Not all floor-joist lumber has the same strength, and even wood of the ...

As an example, 2-by-6-inch No. 2 grade wood floor joists set 16 inches apart can span up to 10 feet 4 inches, whereas a 2-by-8-inch floor joist can span 14 feet and a 2-by-10-inch floor joist can ...

Q. This week: My house is about 70 years old and the floors on the first story shake when someone walks on them. The problem, I think, is that the floor joists are too narrow. They're only 7.5 ...

DEAR TIM: I’m going to build a room addition because moving to a bigger home is just out of the question. I’ve never done rough framing for a subfloor, and I need a quick tutorial on the top ...

This will give you the location of the floor joists. If the distance ... 3/4 inch thick. If it's wider (not likely, but possible) the subfloor can be up to 1 1/2 inches thick for a 36-inch span.

The hole cannot be larger than one-third the depth of the joist, so the maximum hole size for a 2x12 joist (actual size 1-1/2 ...

Even if you use the strongest and highest-grade lumber floor joist, you can’t come close to the distance you can span using a floor truss. Trusses do have at least one drawback: how they act in ...

Homefix: Add joists, beam to correct sagging floors. Dwight Barnett. ... My other problem is there is no room in the crawl to work; the house is about 6 inches off the dirt floor.