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 (e.g., 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 specifications, using fasteners and materials (e.g., 2 x 4, 2 x 6).

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.

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 workers do to protect themselves in setting trusses?
- What is the purpose of bracing?
- What are possible consequences of improper bracing?