07 Sloping Peak Roof Collapse Flashcards
What are the collapse hazards of a peaked roof?
- Falling hazards
- Structural framing
- Roof deck
- Slate or tile shingles
The three most common types of sloping roofs are?
- Gable roof
- Hip roof
- Gambrel roof
The less common types of sloping roofs are?
- Shed
- Mansard
Primary Structural Elements: Flat Roof
2 - Two Bearing Walls
Primary Structural Elements: Gable Roof
3 - Two bearing walls, one ridge rafter
Primary Structural Elements: Hip Roof
9 - Four bearing walls, one ridge rafter, four hip rafters
The three most common types of wood construction used for sloping roofs are:
- Timber Truss
- Plank-and-beam
- Rafter
Which is the safest roof to walk on?
Rafter - it has the least area of unsupported roof deck
Which has the most area of unsupported roof deck?
The truss roof
Where is roof rot found most often?
The roof edges
Where roofs change slope
Where a sloping roof abuts a vertical plane
One slate or tile shingle can be 2 inches thick and weigh up to _____________.
10 pounds
What are some of the causes of slate or tile shingle collapse?
- The wooden roof deck to which the shingles are nailed can be destroyed by fire.
- All stone is adversely affected by sudden changes in temps - cracks/breaks when heated by flames
- A powerful hose stream striking a sloping roof can drive slate or tile from the rooftop to fly into the air
What does a pitch of “4 in 12” mean to a sloped roof?
That there is 4 units of rise to 12 units of rafter span.
What would be a low-, medium-, and high-pitched roof?
- 2 in 12
- 5-6 in 12
- 15 in 12
Can high-pitched roofs be walked on?
Not safely, not even with the assistance of a roof ladder
