Title: Install the collar ties (i.e., rafter ties).
Course: Carpentry II (17003-II) > Section: Framing a Roof

Installation should include

- cutting the collar tie to length to within, +/- 1/16 inch
- cutting the collar tie to angle to within +/- 1 degree
- positioning the collar tie correctly
- installing according to blueprint specifications.

Process/Skill Questions:

- What is the function of collar ties?
- What might happen if collar ties are not installed?

NCCER Carpentry
General Carpentry, Module 27112 Roof Framing describes the most common roof types and introduces basic roof framing components. Includes instructions for laying out rafters for gable roofs, hip roofs, and valley intersections. Covers stick-built and truss-built roofs, and includes the basics of roof sheathing installation.