Roof Rafter Span Lengths

Input the rafter span on the flat eave overhang and pitch of the roof.

Roof rafter span lengths.

With the tape measure hooked onto the top end transfer your two rafter lengths onto. Rafter length using angle v r 2cos a rafter length using pitch v r 2 sqrt 1 p 2 where v overhang r roof span p pitch. Here the number is 941 86 inches. Here the number is 1166 66 inches.

This calculator is to be used as an estimating tool only. Before you can mark the rafter lengths and layout check the. Roof rise this should be calculated from the base of the roof to the highest point of the roof gable the peak. Determine the camber along the timbers length.

Click the button to calculate the stock size needed for this job. Ceiling joist span use this table to determine the maximum lengths of ceiling joists based on species of lumber joist spacing and joist size. Mark the plumb cuts. Area span on the flat please enter area span on the flat in foot.

Use our online rafter length calculator to quickly compute the length of the shed roof rafter by entering the measurements of overhead length of roof span pitch or angle. Marking out the roof rafter lengths onto the timber before cutting step 1.