Timber Floor Joist Span Calculator

This span table is to the format and methodology given in bs 5268 7 1.

Timber floor joist span calculator. Of hyspan sizes. Span tables allow users to choose an appropriate size and stress grade to achieve spanning needs. Designing with wood beam span tables. Use the span tables below to determine allowable lengths of joists and rafters based on size and standard design loads.

Floor joist span calculator. For simple construction such as domestic construction this can be determined from span table supplements in as1684 2 and as1684 3. Designit software for optimised design using the full range. The resulting spans are less than the 2012 irc codes but they are to our standards at scott s framing.

Joists continuous span beam. These spans were calculated using our floor joist calculation engine. Find the column for your dead load and spacing and the row for your timber size to find the permissible clear span in metres. Other more complex load condition spans can be determined with our free hyne timber design 7 5 software.

Also available for the android os. 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. All the figures are based on normal domestic floor loadings where the floor construction is typically 18 25mm floor boards sheets with up to 12 5mm thick plasterboard and skim underneath. Fwpa timber service life design guide.

You can also use the wood beam calculator from the american wood council website to determine maximum rafter and joist lengths. The following table gives details of allowable spans and spacing between joists for the most common timber sizes used in floor construction. Floor joist span tables for surveyors floor construction surveyors and structural engineers use data from tables below to help calculate the size of timbers necessary to give adequate support to timber floors. Calculate the span for floor and ceiling joist with this free and simple online 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. Click on a span to generate a full calculation you can adjust the exact span. Next use the buttons in the table to select the maximum length in feet or metres in brackets that your floor joists must span.