Floor Load Width Single Span

Dead load weight of structure and fixed loads 10 lbs ft 2.

Floor load width single span.

Roof load width rlw and floor load width flw can be determined from as1684 or from the images below. Roof rafter span use this table to determine the maximum lengths of roof rafters based on species and grade of lumber spacing dimensions load and slope. Let s expand our house beyond that 17 2 span capability to 24 feet wide. So the house dimensions will now be 24 x 13.

Live load floor joist span tables in chapter 7 of the state residential code based on the 2012 international residential code. 1 psf lb f ft 2 47 88 n m 2. I asked my local building official how he checks a deck plan to make sure the joist size and spacing combination will meet requirements of the building code he goes to the 40 lb. Tcdl 10 psf and bcdl 5 psf 3.

Maximum floor joist span for no. The span table for a 30 psf live load 10psf dead load floor indicates a required fb value of 1 315 and a minimum e value of 1 800 000. The widest span in the floor joist span table in part 2 of this tutorial module showed that floor joists can span 17 2 if they are 2 x 12s spaced 12 o c. 1 ft 0 3048 m.

The width is considerably more important than the thickness of a board. In the example the joists have a spacing of 16 inches and a span of 11 feet 2 inches. Required size for a given span. Spans shown are in feet 4.

Live load l 480 total load l 360 5. Live load represents the weight of furniture snow etc. Dead load is the weight of the structure and any fixed items. Live load is weight of furniture wind snow and more.

Floor joist span use this table to determine the maximum lengths of floor joists based on species of lumber joist spacing and joist size. Spacing should be interpreted as the centre to centre distance between adjacent parallel members. If you have any questions you should contact an engineer. 2 grade of douglas fir are indicated below.

Top and bottom chords braced by structural sheathing 6. For example a joist made from doubled 2 x 6s can span a distance about 25 percent more than a single 2 x 6 but a 2 x 12 can span about 80 percent more than a 2 x 6 even though it has the same amount of wood as a doubled 2 x 6. Next consult a span table to cross reference the spacing and span to find the required fb value for that table s load limits. Maximum span of 2x6 floor joist.