Home joist span calculator.
Floor joist cantilever 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.
Species southern pine douglas fir larch hem fir spruce pine fir redwood western cedars ponderosa pine red pine.
The highest is a fully loaded floor 70 pounds per square foot.
Most lay outs are on 16 so the field is pre selected.
Many building departments limit joist cantilevers to 24 maximum.
Home joist span.
You must use at least five framing nails to attach the rim joist to the ends of your joists.
Also available for the android os.
Next use the buttons in the table to select the maximum length in feet or metres in brackets that your floor joists must span.
Floor cantilevers supporting an exterior balcony are permitted to be constructed in accordance with table r502 3 3 2.
For help simply click on the beside the section you need help with or watch this tutorial video.
Joist size 2x8 2x10 2x12.
The distance your joists can safely cantilever or overhang a drop beam is determined by the size of the joists the wood type and grade of the lumber and the spacing between joists.
Floor joist span calculator.
The lowest is a plain ceiling joist with no storage 10 pounds per square foot.
Span calculator for wood joists and rafters also available for the android os.
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 cantilevers constructed in accordance with table r502 3 3 1 shall be permitted where supporting a light frame bearing wall and roof only.
Select the on center spacing for the joists.
Floor cantilever spans shall not exceed the nominal depth of the wood floor joist.
On center joist spacing 12 16 24 overhang.
