BC Chapter 11

Question 1

Several Fundemental Safety points regarding roofs:

(3)

p. 278

Answer 1

• Not as strong as floors because they are designed for lighter live loads.
• Concealed spaces
• Loads may be added for which they were not designed for.

Question 2

Roofs can be classified into three syles:

p. 279

Answer 2

• Flat
• Pitched
• Curved

Question 3

Low slope roofs have a slope up to:

p. 279

Answer 3

3 pitch

Question 4

Medium to high pitch roofs have slopes of _______ to _________.

p. 280

Answer 4

4 to 12

Question 5

Style of roof designed to provide light and ventilation. A raised central section of the roof extends several feet above the roofline. This section usually has windows and is called a “celrestories”.

p. 281

Answer 5

Monitor Roof

Question 6

Conventional framing components include:

p. 285

Answer 6

• Rafters
• Ridge boards
• Collar ties
• Rafter ties

Question 7

Common wood trusses can be spaced _____ to ____ feet, center to center.

p. 287

Answer 7

2 to 4 feet

Question 8

The most common type of roof trusses are the:

(2)

p. 289

Answer 8

Fink and Pratt

Question 9

On a flat roof, this barrier is designed to reduce the diffusion of interior moisture into the isulation layer.

p. 292

Answer 9

Vapor barrier

Question 10

Three general categories of membrane roofs:

p. 292

Answer 10

• Built-up
• Single-ply
• Fluid applied

Question 11

Roof coverings that pass required test procedures are classified in 3 categories.

What are they and what does each classification represent?

p. 299

Answer 11

• Class A - Severe exposure
• Class B - Moderate exposure
• Class C - Light exposure