Most interior beams need to include the roof load.
Floor joist span calculator canada.
The highest is a fully loaded floor 70 pounds per square foot.
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.
There are six choices.
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.
This calculator matches up with 90 of the applications in the 2012 international residential code book.
Span calculator for wood joists and rafters also available for the android os.
Use the span tables below to determine allowable lengths of joists and rafters based on size and standard design loads.
Also available for the android os.
Tj 9510 installation guide for floor and roof framing with tji s31 s33 and s47 joists east canada 9030 floor framing standards guide.
The lowest is a plain ceiling joist with no storage 10 pounds per square foot.
This is how far apart they will be.
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.
It has been my experience to never use a beam smaller than a two ply 2 x 8.
Bold italic spans indicate floors that would meet national building code of canada nbcc.
A framer s guide to the installation process usp994 131 usp connector guide for trus joist products canada.
Species southern pine douglas fir larch hem fir spruce pine fir redwood western cedars ponderosa pine red pine.
You can also use the wood beam calculator from the american wood council website to determine maximum rafter and joist lengths.
Most lay outs are on 16 so the field is pre selected.
Floor joist span tables for various sizes and species of wood.
