Floor Joist Span Calculator

It is simple to use yet flexible enough to analyze a variety of common applications.
Floor joist span calculator. Joists must be braced against rotation at all supports. Select the on center spacing for the joists. Floor joist span calculator to use the joist span calculator below first select the species of lumber you will use for your construction project from the drop down list. Next use the buttons in the table to select the maximum length in feet or metres in brackets that your floor joists must span.
1 psf lb f ft 2 47 88 n m 2. This is how far apart they will be. Live load is weight of furniture wind snow and more. The user enters the member geometry adds loads holes and other relevant data and then selects a product for analysis.
Most lay outs are on 16 so the field is pre selected. Use the span tables below to determine allowable lengths of joists and rafters based on size and standard design loads. 1 ft 0 3048 m. Also available for the android os.
For two equal spans the listed span is the center to center distance from either end to the center support with the joist continuous over the center support. Span calculator for wood joists and rafters also available for the android os. Joist flanges must be fastened to the support. Span calculator for wood joists and rafters also available for the android os.
2 grade of douglas fir are indicated below. Bc calc performs engineering analysis to help our customers size beams joists columns studs and tall walls for their building projects. Use the joist span and spacing calculator below to plug in your desired type of wood the size of your joists and the required spacing between each joist. Also available for the android os.
The lowest is a plain ceiling joist with no storage 10 pounds per square foot. There are six choices. End web crippling check is based upon 3 5 inch end bearing. You can also use the wood beam calculator from the american wood council website to determine maximum rafter and joist lengths.
Maximum floor joist span for no. The highest is a fully loaded floor 70 pounds per square foot.