Floor Joist Spacing Chart

The extra two inches of vertical distance when a floor is framed with 2 x 10 joists rather than 2 x 12s can be quite important for example.

Floor joist spacing chart.

But larger is not always better when builders are constructing a home or adding a room addition. Joist span and spacing is set by your local building code. A 2x8 up to 12 feet. Joist span table use these tables to determine floor joist spans based on grade of lumber size of joist floor joist spacing and a live load of 30 lbs ft 2 or 40 lbs ft 2 these tables can also be used to determine deck joist span.

This a rough guideline. However when running spf 2 6 floor joists into the floor joist calculator referenced above you get a maximum span of 9 feet 8 inches with a minimum bearing length of 3 inches at each end on 12 centers. In general terms joists spaced 16 inches on center can span 1 5 times in feet their depth in inches. How do i keep them even.

Common sense tells you that large floor joists can carry more load and spacing joists closer together also increases the load bearing capacity of a floor. When building a house or even a deck it is important to confirm you have the correct joist sizes spans and spacing before you get started. 2x10 to 15 feet and 2x12 to 18 feet. A lot of questions revolve around joists when it comes to building a deck.

How far apart are floor joists placed. What is the proper placement. Since the example house we are designing for is 12 feet wide we need to find in the floor joist span table a joist size and centering that can span 12 or wider. Floor joist span tables for various sizes and species of wood.