Chapter 14- Collapse

Question 1

__ __ is perhaps the greatest collapse danger to fire fighters today, given the complete proliferation of this type of construction throughout the country.

Answer 1

Lightweight construction

Question 2

__ collapses can and do happen during search and rescue operations.

Answer 2

Secondary

Question 3

Braced frame buildings are particularly susceptible to this type of collapse.

Answer 3

Inward outward collapse

Question 4

Tilt wall failure (which can fall in or out) is an example of a __ collapse.

Answer 4

90 degree

Question 5

A collapse in which an entire wall fails as one unit.

Answer 5

90 degree wall collapse

Question 6

A collapse in which one end of the collapsed floor is supported by an interior wall, creating two void spaces.

Answer 6

A frame floor collapse

Question 7

A collapse in which one end of the floor is still supported while the other end is unsupported. Voids can be created in such situations.

Answer 7

Cantilever floor collapse

Question 8

Often associated with brick veneer non load bearing walls, but also including other masonry walls. The wall falls like a curtain–straight down.

Answer 8

Curtain wall collapse

Question 9

Results in the complete failure of the building.

Answer 9

Global (total) collapse

Question 10

A collapse in which the exterior wall fails horizontally, with the interior wall folding horizontally. The top portion of the building fails inward while the bottom half fails outward.

Answer 10

Inward outward collapse

Question 11

Limited to wood frame structures, this type of collapse is characterized by a wooden building that shifts at the upper levels, leaning into adjacent buildings or totally collapsing sideways in the absence of adjacent buildings.

Answer 11

Lean over collapse

Question 12

A collapse of a buildings floors in which one end of the floor is still supported, sometimes at or near the original point of connection to the wall. A triangular void space is created.

Answer 12

Lean to floor collapse

Question 13

A collapse of a building’s floors (and possibly roof) in a pancake stack fashion with each floor (roof) laying flat on top of the one below.

Answer 13

Pancake collapse

Question 14

Results from a failure of a portion of the building. A situation in which a section of floor gives way without bringing down the rest of the building would be a partial collapse. A partial collapse can be just as deadly as a global collapse.

Answer 14

Partial collapse

Question 15

Extensive structural failure initiated by local structural damage or a chain reaction of failures following damage to a small portion of a structure.

Answer 15

Progressive collapse

Question 16

An additional collapse that occurs after the initial collapse. Often occurs when loads shift after a primary collapse, causing additional portions of the structure to fail.

Answer 16

Secondary collapse

Question 17

In firefighting terms, the perception of the surroundings of time and space, the understanding and comprehension of these observations, and the projected outcome of a change in these conditions.

Answer 17

Situational awareness

Question 18

A collapse in which the floor fails near its center, with the perimeter of the floor still partially supported by the walls. Two voids are created in this type of collapse.

Answer 18

V shaped floor collapse