Chapter 13 Flashcards
(37 cards)
Open space within walls for wires and pipes.
A chase
The concealed space between the top-floor ceiling and the roof of a building.
Cockloft
The movement of heat and smoke from the higher pressure within the fire area toward the lower pressure areas accessible via doors, window openings, and roof structures.
Flow path
A fire in which the heat release rate and fire growth are controlled by the characteristics of the fuel because there is adequate oxygen available for combustion.
Fuel-limited fire
Connecting plate made of a thin sheet of steel used to connect the components of a truss.
Gusset plate
The opening or removal of windows or doors on any floor of a fire building to create flow paths for fire conditions.
Horizontal ventilation
Ventilation that relies on the movement of air caused by a fog stream that is placed 2 to 4 inches (0.6 to 1.2 m) in front of an open window.
Hydraulic ventilation
A cut in the roof that is the width and depth of the saw blade. It is used to inspect cockloft spaces from the roof.
Kerf cut
Thin strips of wood used to make the supporting structure for roof tiles.
Lath
A cut that is made using power saws and axes to cut along and between roof supports so that the sections created can be tilted into the opening.
Louver cut
A process of removing heat, smoke, and gases from a fire area by using exhaust fans, blowers, air-conditioning systems, or smoke ejectors.
Mechanical ventilation
The flow of air or gases created by the difference in the pressures or gas densities between the outside and inside of a vent, room, or space.
Natural ventilation
Ventilation that relies on electric fans to pull or draw the air from a structure or area.
Negative-pressure ventilation
The interface at a vent, such as a doorway or a window opening, between the hot gas flowing out of a fire compartment where the pressure difference between the interior and exterior is equal.
Neutral plane
The part of a wall entirely above the roofline.
Parapet
A ventilation opening that runs along the top of a pitched roof.
Peak cut
The use of positive-pressure fans to control the flow of products of combustion while fire suppression efforts are underway.
Positive-pressure attack
Ventilation that relies on fans to push or force clean air into a structure after a structure fire has been controlled.
Positive-pressure ventilation
The main ventilation opening made in a roof to allow smoke, heat, and gases to escape.
Primary cut
The membrane, which may also be the roof assembly, that resists fire and provides weather protection to the building against water infiltration, wind, and impact.
Roof covering
The rigid portion of roof between the roof supports and the roof covering.
Roof decking
An additional ventilation opening made for the purpose of creating a larger opening or limiting fire spread.
Secondary cut
A ventilation opening that is usually about 8 ft by 4 ft (1.2 m by 2.4 m) in size; it is primarily used for large commercial buildings with flat roofs.
Seven, nine, eight (7,9,8) rectangular cut
A mechanical device, similar to a large fan, that can be used to force heat, smoke, and gases from a post-fire environment and draw in fresh air.
Smoke ejectors
