Loft Floor Joist Span

If you are seriously considering a loft conversion get the thing designed by a someone who has designed loft conversions in the past and is up to date with the regs and building practices concerned.

Loft floor joist span. As a general principle leave your ceiling joists alone and install a new floor above them but see 3 below 3. 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. Loft will be 19 7 1 4 wide by 8 deep. Span calculator for wood joists and rafters also available for the android os.

Can i get floor joists that will span almost 20 without using column support. Also available for the android os. 1 ft 0 3048 m. Surveyors and structural engineers use data from tables below to help calculate the size of timbers necessary to give adequate support to timber floors.

The floor joist span tables are based on the loadings given in the amended version of bs 6399 1 which is an imposed load of either a uniformly distributed load of 1 5 kn m or a concentrated load of 1 4 kn. Live load is weight of furniture wind snow and more. 2 grade of douglas fir are indicated below. Maximum floor joist span for no.

If so what spacing between floor joists do you recommend. I m building a loft above my garage for storage. Span entries are listed for 2 6 through 2 12 joists and 12 in 16 in and 24 in. Joist span and spacing is set by your local building code.

Ceiling joists for non habitable loft floors c16 strength grade timber. Floor joist span tables for surveyors floor construction. 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. 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.

What size floor joists should i use 2 x8. Floor joist span tables for various sizes and species of wood. 1 psf lb f ft 2 47 88 n m 2. Dead load weight of structure and fixed loads 10 lbs ft 2.

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.