Floor Load Width Single Span

This chart is for basic reference only.

Floor load width single span.

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. If you have any questions you should contact an engineer. Openings are to be located in the center of the span max opening width is 24 inches 7. Live load floor joist span tables in chapter 7 of the state residential code based on the 2012 international residential code.

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. Spans shown are in feet 4. 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. The width is considerably more important than the thickness of a board.

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 weight of structure and fixed loads 10 lbs ft 2. Live load is weight of furniture wind snow and more. Tcll top chord floor live load 2.

In the example the joists have a spacing of 16 inches and a span of 11 feet 2 inches. Live load represents the weight of furniture snow etc. Maximum span of 2x6 floor joist. Live load l 480 total load l 360 5.

Let s expand our house beyond that 17 2 span capability to 24 feet wide. Top and bottom chords braced by structural sheathing 6. Dead load is the weight of the structure and any fixed items. So the house dimensions will now be 24 x 13.

Next consult a span table to cross reference the spacing and span to find the required fb value for that table s load limits. Tcdl 10 psf and bcdl 5 psf 3. Required size for a given span. 2 grade of douglas fir are indicated below.

1 ft 0 3048 m. Spacing should be interpreted as the centre to centre distance between adjacent parallel members. 1 psf lb f ft 2 47 88 n m 2. Maximum floor joist span for no.