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 2 x 10.
This product is third party certified signifying sourcing from renewable and environmentally managed forests.
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.
1 ft 0 3048 m.
Common joist spacings for 2 by 10 joists and other dimensional lumber sizes are 12 16 and 24 inches.
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.
2 x 8 joists spanning only 8 feet is more than enough.
2 grade of douglas fir are indicated below.
Find 2 in x 10 in pressure treated lumber at lowe s today.
Live load is weight of furniture wind snow and more.
Every piece of 2 in.
Spaced o c species grade 30 lb ft 2.
Joists that are closer together can support more weight which allows the joists to span a longer distance than joists spaced further apart.
The maximum span distance for 12 inch spacing is greater by as much as 30 percent compared to 24 inch.
2 prime kiln dried southern yellow pine lumber meets high grading standards for strength and appearance and is easy to cut fasten and paint making this the best choice for many building projects.
Maximum floor joist span for no.
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.
But larger is not always better when builders are constructing a home or adding a room addition.