Roof Hip/Valley Calculator
Spacing = 16
Common Rafter =
Jack Rafter =
Calculates the length for the Hip and/or Valley of a roof based on the span of the roof and the slope of the roof.
-Span: Span of the roof.
-Spacing [o.c.]: Spacing of the rafters from center-to-center.
-Rise: Rise of the roof in units of inches relative to 12 inches of horizontal run. For example, where it is a 6:12 slope roof, enter 6.
-Hip/Valley: Length of the hip or valley.
-Difference: Common difference in length of the jack cripples to connect the hip to the valley.
-Common Rafter: Length of the common rafter
Calculate the length for the Hip and Valley of a roof based on a 15'4" span with a 6:12 slope. Spacing of rafters will be 16" on-center. The distance measured at the seat of the hip to the seat of the valley is 4'8".
Hip or Valley Rafters
-Span: 15ft 4in
-Spacing: 16in o.c.
The Hip and Valley length is 11ft 6in.