Can A 2x 8 Be Used For Floor Joists

1 psf lb f ft 2 47 88 n m 2.

Can a 2x 8 be used for floor joists. Most spans are typically 10 to 12 feet so we typically use 2x8 or 2x10. Joist span and spacing is set by your local building code. 2 grade of douglas fir are indicated below. 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.

But larger is not always better when builders are constructing a home or adding a room addition. The maximum span distance for 12 inch spacing is greater by as much as 30 percent compared to 24 inch spacing. 1 ft 0 3048 m. Live load is weight of furniture wind snow and more.

Dead load weight of structure and fixed loads 10 lbs ft 2. However with this type of situation the heavier the better so you will have a very stable and secure platform with the use of 2 x 10 s. The depth or height of your floor joists depends on how far they can span without sagging. For example in the joist span table below the highlighted cell shows that 2 x 8 southern yellow pine joists that have a grade of 2 and are spaced 24 apart can have a maximum span of 10 feet 3 inches 10 3 if designing for a live load of 40 lbs ft 2.

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. There are online span calculators available that tell you the maximum span for. The dead load on a floor is determined by the materials used in the floor s construction. Joists that are closer together can support more weight which allows the joists to span a longer distance than joists spaced further apart.

These tables can also be used to determine deck joist span. If there s wall board covered ceiling suspended from the underside of that floor the dead load increases to about 10 pounds per square foot. 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. 2 x 8 joists spanning only 8 feet is more than enough.

Depending on the length of the home and the number of floor joists the additional cost for the heavier floor joists may not be very substantial. Spacing is measured from the center of one joist to the center of the next.