Here the number is 1166 66 inches.
Roof rafter sizes.
Rafter slope min 15 max 45 degrees.
Input the rafter span on the flat eave overhang and pitch of the roof.
Input the rafter span on the flat eave overhang and pitch of the roof.
The full version allows any size.
Clear span on plan.
This is the distance between rafter centres.
This calculator is to be used as an estimating tool only.
Usually 400 450 or 600mm but any value can be used up to 610mm max.
Here the number is 941 86 inches.
Rafter stock size calculator.
It is always better to have a large rafter rather than be concerned with a sagging roof.
If your project had a rafter length of 8 or less a safe and strong method is to use 2x8 framed 16 on center.
Roof rise this should be calculated from the base of the roof to the highest point of the roof gable the peak.
Click the button to calculate the stock size needed for this job.
Click the button to calculate the stock size needed for this job.