Title: (Optional) Install trusses.
Course: Building Trades II (17009-II) > Section: Carpentry: Framing a Roof

Installation should include

- determining and laying out centers from details, accurate to within +/- 1/16 inch (for example, 12-inch, 16-inch, 18.5-inch, and 24-inch centers)
- selecting the appropriate truss
- using safe lifting techniques
- sliding the truss into place according to the layout, on the double top plate
- anchoring the truss with fasteners
- maintaining centers
- bracing temporarily to prepare for sheathing.
- cutting and installing the brace according to manufacturer's specifications, using fasteners and materials (e.g., 2x4, 2x6).

IRC: Chapter 8, section R802.10, covers wood truss installation, design, installation, tie-downs, uplift resistance, bracing, and limits to a truss design. Section R806 covers required venting for all roof structures (https://codes.iccsafe.org/content/IRC2018P4).

Process/Skill Questions:

- What is the most common spacing of trusses?
- What factors influence the spacing of trusses?
- What safety concerns are associated with setting trusses?
- What things can a worker do to protect himself/herself in setting trusses?
- What is the purpose of bracing?
- What are possible consequences of improper bracing?

NCCER Standards:

Carpentry Fundamentals: Level 1

- 27107-06 Roof Framing