Hip Roof Rafter Span Table

On a related note the pitch properly the slope of a hip or valley rafter will not be the same as the pitch of the adjacent roof sections.

Hip roof rafter span table.

Surveyors and structural engineers utilise data from tables below to help calculate the correct size strength and centres of roof timbers for the required spans and loadings. 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. Floor joist span use this table to determine the maximum lengths of floor joists based on species of lumber joist spacing and joist size. The international code council icc is a non profit organization dedicated to developing model codes and standards used in the design build and compliance process.

While the slope of the common rafters are expressed as x in 12 the slope of the hip and valley rafter on the same roof will be x in 16 97 so where two roof sections intersect to form a 90 angle a regular hip or valley and each roof. Roof pitch between 15 and 22 5 degrees with rafter spacing strength class c16 size of rafters in mm 400mm 450mm 600mm. Surveyors span tables for designing roof rafters. Rafter span tables use these tables to determine lengths sizes and spacing of rafters based on a variety of factors such as species load grade spacing and pitch.