Roof rafter span use this table to determine the maximum lengths of roof rafters based on species and grade of lumber spacing dimensions load and slope.
Roof joist spacing calculator.
This demo version is fixed at 1m clear span.
Click on a span to generate a full calculation you can adjust the exact span.
Find the column for your dead load and spacing and the row for your timber size to find the permissible clear span in metres.
Usually 400 450 or 600mm but any value can be used up to 610mm max.
Flat roof joist calculator.
Span calculator for wood joists and rafters available for the iphone.
1 enter joist details 1 1 span and joist spacing.
Spacing in live load psf dead load psf exterior exposure.
Floor joist span use this table to determine the maximum lengths of floor joists based on species of lumber joist spacing and joist size.
Span calculator for wood joists and rafters also available for the.
Spacing in exterior exposure.
Rise and run means that a 6 12 pitch roof has 6 of rise vertical for each foot of run horizontal.
This span table is to the format and methodology given in bs 5268 7 2.
The full version allows any size.
Live load psf dead load psf span calculator for wood joists and rafters available for the iphone.
Our roof rafter calculator tools are handy for calculating the number of rafters needed rafter length calculator lineal feet of rafter board feed in ridge and sub facia and the total board feet in the roof.