It gets even more complex. There are scientific span tables that are referenced in the building code that tell you the minimum standards that the floor joist in your room addition must meet.

There are scientific span tables that are referenced in the building code that tell you the minimum standards that the floor joist in your room addition must meet. These span tables tell you the ...

No, that's not a typo. Let's first discuss the span tables. A span table is a chart that shows how far a certain floor joist can span and not bend too much depending on several factors.

My problem is the floors sag in the living room to the point where it’s hard to keep a lamp steady on the end tables ... grade wood floor joists set 16 inches apart can span up to 10 feet ...

Let’s first discuss the span tables that Stewart mentioned. A span table is a chart that shows how far a certain floor joist can span and not bend too much depending on several factors.

Q: I’m going to build a room addition because moving to a bigger home is out of the question. I’v e never done rough framing for a subfloor, and I need a quick tutorial on the top things one ...