Pitched Roof Framing

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.

Pitched roof framing.

Guide to building and framing a saltbox style roof. Then gather your measurements by calculating the run rise and length of each rafter segment in feet and the pitch of your roof in inches. This will the first point of the rafter measurement line using the results of your rafter length calculation measure from this point along the rafter measurement. Mirrored pairs of rafters meet at a ridge and are connected across the base by a ceiling joist.

Three important considerations for building a shed roof roof pitch. From one end of the rafter material using a speed square or framing square mark an x in 12 angle on the rafter and cut it measure down y height from the long point of the rafter cut and make a mark. Wondering how to build the structure of your roof. We will go over raft.

The pitch of the roof refers to the angle or steepness of the roofing frame. Next use these calculations to determine how many rafters you ll need for your roof and cut them to size. Visit the roof framing page for more information on cutting roof rafters and visit the roof pitch calculator for determining rafter lengths based on rise and run. An example of each is shown in figure 2 1.

Roof framing rafter layout. Rafter layout 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. This means that for every horizontal run of 12 you need at least 3 of rise. In profile the framing of a conventional pitched roof forms a triangle.

Common types of roofs and basic framing terms. Gable a gable roof has a ridge at the center and slopes in two directions. One thing you never want to do when designing your roof is build one with a pitch lower than 3 12. The inherent strength and integrity of the triangular form makes the roof a sound structure.

It is the form most commonly used by. So if the pitch of your roof is 7 12 place one stair gauge on the vertical part of the framing square the tongue at the 7 inches 18 cm mark and place one stair gauge on the horizontal part of the framing square the body at the 12 inches 30 cm mark. Types of roofs the most commonly used types of pitched roof construction are the gable the hip the intersecting and the shed or lean to. Fix stair gauges on the framing square to mark the pitch.

A framing square is traditionally used for laying out the roof and determining pitch. This process uses pre built wood forms to build the roof frame.