Floor Joist 16 Oc

The vast majority of floor joist systems are built with 16 oc on center spacing.

Floor joist 16 oc.

If you were to draw a line down the center of two joists and then measure the distance between them as 16 inches that measurement is 16 inches on center. The illustrations one for cantilever joists and one for flush rim beam hung joists point out where joist span measurements are taken from the saddle of the ledger mounted joist hanger to the center of a dropped beam or saddle of the. Then place the studs on the same side of each mark. Floor joist span tables for various sizes and species of wood.

Maximum floor joist span for no. Dead load weight of structure and fixed loads 10 lbs ft 2. True floor joist span calculations can only be made by a structural engineer or contractor. For example in the 50 s and 60 s many homes were built with 4x10 joists at 4 oc.

1 psf lb f ft 2 47 88 n m 2. 1 ft 0 3048 m. This sample table gives minimum floor joist sizes for joists spaced at 16 inches and 24 inches on center o c for 2 grade lumber with 10 pounds per square foot of dead load and 40 pounds of live load which is typical of normal residential construction. 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.

For a basic 16 inch oc layout on a stud wall you can simply make a mark every time you see a red number. It is possible to build with wider spacing. However such construction used 2x6 t g or 1 and 1 4 plywood subfloor material. 16 32 48 64 80 96 etc.

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. 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. Span entries are listed for 2 6 through 2 12 joists and 12 in 16 in and 24 in. The distance between two deck joists is measured in inches on center commonly abbreviated as oc.

This was a good system but very costly with today. If you measured from left to right the studs go on the right side of each mark.