Floor Joist Spacing
Two options that arise could be your wider 24 and your narrower 12 options for spacing.
Floor joist spacing. 1 ft 0 3048 m. Joist span and spacing is set by your local building code. 1 psf lb f ft 2 47 88 n m 2.
Maximum floor joist span for no. 2 8 s come standard at 1 inch thick. 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. Normally floor joists are spaced 16 inches apart on center. 2 grade of douglas fir are indicated below.
Dead load weight of structure and fixed loads 10 lbs ft 2. 2x8s are used frequently for these projects. Live load is weight of furniture wind snow and more.
In this situation your floor joist will be required to be 12 or 24 inches apart on center. With some structures floor joists are required to be 12 or 24 inches apart on center. 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.