Floor Load Width Single Span

Top and bottom chords braced by structural sheathing 6.

Floor load width single span.

Spans shown are in feet 4. Tcll top chord floor live load 2. Let s expand our house beyond that 17 2 span capability to 24 feet wide. 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.

2 grade of douglas fir are indicated below. 1 psf lb f ft 2 47 88 n m 2. Roof load width rlw and floor load width flw can be determined from as1684 or from the images below. If you have any questions you should contact an engineer.

Dead load weight of structure and fixed loads 10 lbs ft 2. 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. 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. Required size for a given span.

This chart is for basic reference only. Floor joist span use this table to determine the maximum lengths of floor joists based on species of lumber joist spacing and joist size. Live load is weight of furniture wind snow and more. Live load l 480 total load l 360 5.

Tcdl 10 psf and bcdl 5 psf 3. 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. Dead load is the weight of the structure and any fixed items. In the example the joists have a spacing of 16 inches and a span of 11 feet 2 inches.

Maximum floor joist span for no. Maximum span of 2x6 floor joist. Next consult a span table to cross reference the spacing and span to find the required fb value for that table s load limits. 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.

Spacing should be interpreted as the centre to centre distance between adjacent parallel members. So the house dimensions will now be 24 x 13. The width is considerably more important than the thickness of a board. Live load floor joist span tables in chapter 7 of the state residential code based on the 2012 international residential code.