Title: Identify common, valley, hip, and jack/cripple rafters.
Course: Carpentry I (17003-I) > Section: Identifying Elements of Roofs

Identification should include

- the physical description of each
- the function of each
- the location of each once they are installed
- rafter layout specifications
- rafter length measurements
- pitch and birdsmouth
- the building code reference for the installation requirements of rafters.

Process/Skill Questions:

- What are the differences among common, valley, hip, and jack/cripple rafters? In what situations should each be used?
- Which set of plans should be read and followed when laying out rafters?
- What determines the spacing and size of rafters?
- What are the various methods for installing rafters?
- What are the advantages and disadvantages of each installation method?

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.