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.
Floor joist span calculator canada.
Select the on center spacing for the joists.
Most interior beams need to include the roof load.
A framer s guide to the installation process usp994 131 usp connector guide for trus joist products canada.
Use the span tables below to determine allowable lengths of joists and rafters based on size and standard design loads.
Species southern pine douglas fir larch hem fir spruce pine fir redwood western cedars ponderosa pine red pine.
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.
If there is are any questions about anything else then you should contact your supplier or an engineer.
Tj 9510 installation guide for floor and roof framing with tji s31 s33 and s47 joists east canada 9030 floor framing standards guide.
Bold italic spans indicate floors that would meet national building code of canada nbcc.
The lowest is a plain ceiling joist with no storage 10 pounds per square foot.
You can also use the wood beam calculator from the american wood council website to determine maximum rafter and joist lengths.
1 web stiffeners are required at intermediate supports of continuous span joists when the intermediate bearing length is less than 5 and the span on either side of the intermedi ate bearing is greater than the following spans.
Also available for the android os.
The highest is a fully loaded floor 70 pounds per square foot.
There are six choices.
Floor joist span tables for various sizes and species of wood.
Joist span table use these tables to determine floor joist spans based on grade of lumber size of joist floor joist spacing and a live load of 30 lbs ft 2 or 40 lbs ft 2 these tables can also be used to determine deck joist span.
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.
