Floor Joist Live Load Calculator

Floor joist span use this table to determine the maximum lengths of floor joists based on species of lumber joist spacing and joist size.

Floor joist live load calculator.

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. 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. Live load psf dead load psf exterior exposure.

Span calculator for wood joists and rafters also. First check the local code for allowable live load dead load and deflection see figure 2. In this case your joists are adequate to support a 30 psf live load and 10 psf dead load. Span calculator for wood joists and rafters available for the iphone.

There are six choices. Bc calc performs engineering analysis to help our customers size beams joists columns studs and tall walls for their building projects. Select the on center spacing for the joists. In the example the joists have a spacing of 16 inches and a span of 11 feet 2 inches.

The user enters the member geometry adds loads holes and other relevant data and then selects a product for analysis. Maximum floor joist span for no. 1 psf lb f ft 2 47 88 n m 2. Most lay outs are on 16 so the field is pre selected.

This is how far apart they will be. Live load psf dead load psf span calculator for wood joists and rafters available for the iphone. Live load is weight of furniture wind snow and more. The lowest is a plain ceiling joist with no storage 10 pounds per square foot.

Span calculator for wood joists and rafters also available for the android os. 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. 2 grade of douglas fir are indicated below. The highest is a fully loaded floor 70 pounds per square foot.

For this example i ll use the cabo one and two family dwelling code which serves as the model for many state and local codes. Step 1 check the code. 1 ft 0 3048 m.