Ch 15 Wood Frame Collapse Flashcards
Of the three type of collapse which is the most dangerous? Pg 200
The inward/outward collapse because it is sudden, it gives no visible warning signs prior to failure, and unlike most other buildings failures, it may involve the collapse of two, three, or four walls simultaneously.
Of the theee major types of wood frame construction in the US which presents the greatest danger to firefighters? Pg 202
Braced frame wood constructed buildings.
The four most widely used methods of wood frame construction over the past 200 years are? Pg 203-204
•Braced Frame
•Balloon Frame
•Platform frame
•Lightweight wood frame construction
In the 18th and 19th centuries, the first large wood frame buildings constructed along the East Coast, which will still stand today were of what? Pg 204
Braces frame construction, sometimes called post and grit construction.
The three factors contribute to the Inward/Outward collapse of braced frame wooden building are? Pg 205
•Fire destructive of bearing walls
•Failure at the mortise and tenon connection.
•Exterior wall overload
How many firefighters in the last 24 years have died fighting fires in lightweight wood truss buildings?
p. 205
24
Which is considered a disadvantage of the balloon frame construction method? p. 204
Void space created
What will happen when wooden buildings are built side by side and the one of the wood bearing walls is destroyed by fire on the lower floor?
p. 202
The building will lean to one side
Which is a way that a wood mortise-and-tenon connection can be weakened that is unlike other connections? p. 207
Rotting
Which walls are bearing in wood-frame buildings in older urban neighborhoods? p. 206
Side walls
Which type of collapse is indicated by the corners of the falling wall splitting apart from the remaining walls? p. 200
90-degree angle
Which method of wood-frame construction became widely used in the 19th century as the population moved westward? p. 204
Ballon Frame
What has been found to affect the stability of the wood-frame building?
p. 203
Height
Where will firefighters survive when all four walls collapse in a braced-frame wood building?p. 202
Corner safe zones
Which walls are usually the bearing walls in a building with a flat roof?
p. 207
Ones with greatest dimension
At what height wooden building will firefighters begin to see more global collapse? p. 208
Three stories
What type of collapse does lightweight wood truss construction suffer? p. 205
Floor and roof
Which method of wood frame construction is most widely used today? p. 204
Platform frame
Which floor wall studs would fail first if a fire weakened the bearing wall studs of all four floors at the same
time? p. 203
Ground floor
Which of the following is NOT a factor that contributes to an inward/outward collapse in a wood-frame building?
p. 205
Interior floor overload
Which sides may collapse simultaneously when atriple-decker wood frame building collapses?
p. 209
All four
Which method of constructing a wood-frame building is NOT commonly used?
p. 204
Plank and beam
How is stucco coating applied to the exterior of the wood-frame building?
p. 208
Nailed
What type of load is present when the fire escape pulls on the wall studs and causes a curve? p. 208
Eccentric
How many floors would the concealed void space extend in a three story, platform frame building? p. 205
One
Which type of collapse in a wood-frame building may not exhibit any structural warnings? p. 200
Inward/outward
How does a three-story braced frame structure frequently fall? p. 200
Inward/outward
