Structure of a Roof

1. The first part of the roofing system that sits on top of the walls to support the roof similar to the floor joist is called the...

• Floor joist
• Ceiling
• Roof Rafters
• Subflooring

2. What is the purpose of the "Roof Decking"?

• It provides extra room for the floor joist.
• Covers the rafters and allows material to be mounted on the roof
• Provides extra space in the attic.
• ONLY supports the truss.

3. Roof Rafters are supposed to be placed how many inches apart?

• 12"
• 24"
• 16"
• 18"

4. What part of the roofing system covers the decking and waterproofs the roof and home?

• Studs
• Fascia board
• Roofing Material
• Water proof wood

5. What part is the fascia board used for?

• Water proofing
• Caps the end of the roof rafters. Finish material and gutters mount to it.
• Additional fire proofing
• Insulation purposes

6. What are the three main parts of a truss roof?

• Fire blocking, post and girder and subflooring.
• Top plate, bottom plate and studs.
• Foundation, anchor bolts and band joist.
• Top chord, bottom cord and the truss web.

8. On a gable roof, what special cut/part of the system creates the mounting point for the roof to sit on the walls?

• Rafters
• Ridge
• Joist
• Birds mouth

9. What is the purpose of the truss web in a truss roof system?

• Water proofing the home.
• Supports the truss, subject to compression and tension.
• Create extra insulation.
• Created by spiders in the attic to catch insects.

10. What geometric shape is the strongest?

• Circle
• Square
• Triangle
• Arch