What Is Floor Joist Spacing

While most residential construction uses 2x8 joists with 16 inch spacing there are many other factors you need to consider when determining the proper joist span length.

What is floor joist spacing.

The floor joist spacing is the distance between the centers of any two installed joists. In general terms joists spaced 16 inches on center can span 1 5 times in feet their depth in inches. Normally floor joists are spaced 16 inches apart on center. 2x8s are used frequently for these projects.

In many circumstances 16 inches would be your standard spacing for shed floor joist but this is just a rough guideline. True floor joist span calculations can only be made by a structural engineer or contractor. 2 8 s come standard at 1 inch thick. Maximum floor joist span for no.

The larger the deck the larger the joists. Two options that arise could be your wider 24 and your narrower 12 options for spacing. See the image below for an example of joists spaced 16 on center 16 o c. 2 grade of douglas fir are indicated below.

A 2x8 up to 12 feet. Joist span and spacing is set by your local building code. Live load is weight of furniture wind snow and more. With some structures floor joists are required to be 12 or 24 inches apart on center.

You should check with your local building department for construction requirements in your area. 2x10 to 15 feet and 2x12 to 18 feet. 1 psf lb f ft 2 47 88 n m 2. 1 ft 0 3048 m.

Given that 2x8s are actually 1 inches wide it works out to be 14 inches between each joist. This means from the center of one upright joist to the center of the next.