Framing Roof Valley Rafters

On the common rafters the plumb cut is marked with a framing square for a 12 in 12 pitch 45 and cut square i e no bevel.

Framing roof valley rafters.

Before you cut your boards you ll need to measure the width of your building and calculate the exact length of each rafter. To keep the porch roof framing as simple as possible we installed a structural ridge supported by posts at each end with the common rafters landing on top of the ridge. After installing the rafters we still had to extend the porch roof back over the shed roof creating a valley on either side. If you re framing a gable roof on a new house or building a shed or even a doghouse with a gable roof you ll need to cut a number of roof rafters.

The first cut that i make on both the common rafters and the valley rafter is the plumb cut where the rafter will meet the ridge board. Rafter is called for only when framing a hip roof but a valley rafter is needed on both hip and gable roofs whenever roof planes intersect. After you determine the rise span run line length and pitch the next step is to lay out the rafters or mark the cuts on a pattern rafter to create the roof. Valley rafter a no math approach to valley plates whether you re tying in new gable dormers or adding a chimney cricket during roof framing giving the valley jacks a place to land is an easy task with these step by step instructions.

A jack rafter is a shortened com mon rafter that may be framed to a hip rafter a valley rafter or both. Thus there are hip jack rafters and valley jack rafters. This article will discuss a gable roof without valleys or dormers because it s the most common and the easiest for a first time builder to tackle. Blind valleys simplify framing.

The roof rafters provide integral structural support to the roof.