Floor Joist Span Calculator

While every effort has been made to insure the accuracy of the information presented and special effort has been made to assure that the information reflects the state of the art neither the west coast lumber inspection bureau the american wood council nor its members assume any responsibility for any particular design prepared from this online span calculator.

Floor joist span calculator.

Next use the buttons in the table to select the maximum length in feet or metres in brackets that your floor joists must span. Domestic floor joist calculator. The full version allows any size. 1 enter joist details 1 1 span and joist spacing.

Span calculator for wood joists and rafters also available for the android os. Most lay outs are on 16 so the field is pre selected. Usually 400 450 or 600mm but any value can be used up to 610mm max. Also available for the android os.

This demo version is fixed at 1m clear span. Select the on center spacing for the joists. The lowest is a plain ceiling joist with no storage 10 pounds per square foot. There are six choices.

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. This is the distance between joist centres. This is how far apart they will be. The highest is a fully loaded floor 70 pounds per square foot.