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
