Title: Install purlins.
Course: Carpentry III (17003-III) > Section: Framing a Roof

Installation should include

- positioning the purlin as specified in the plans to within +/- 1/8 inch
- positioning the purlin plate over a load-bearing partition
- cutting to the correct length to within +/- 1/16 inch
- cutting to the correct angle to within +/- 1 degree.

Process/Skill Questions:

- What are the building codes associated with purlins?
- Why are purlins necessary?

NCCER Carpentry Standards

Level One, Module Seven (27112-13): Ceiling and Roof Framing

Module Seven (27112-13) provides an overview of ceiling and roof framing, including the components of ceiling and roof framing, the different types of roofs used in residential construction, and the use of trusses in basic roof framing. The methods for laying out rafters, erecting a gable roof, framing a basic gable end wall, and installing roof sheathing are introduced. It also provides instruction on how to estimate the amount of materials needed for a material takeoff for a roof.