The flashcards below were created by user
drankin1972
on FreezingBlue Flashcards.
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Principal smoke moving mechanism?
Thermal Energy
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Nursing Homes
What does R.A.C.E. stand for?
- Remove
- Activate 911
- Close Doors
- Extinguish Fire
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Corridors in Hospitals?
8 ft.
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Stack levels in libraries
6ft
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Width of school corridors?
6ft
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Global collapse=
complete collapse
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One end to the floor still supported, triangular void
Lean to floor
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Fails in center, perimeter still supported, 2 voids
V-shaped collapse
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One end supported by an interior wall
A-frame
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no voids?
pancake collapse
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one end supported, other end unsupported
Cantilever
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Greatest killer of Firefighters
Heart attack
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Minimum size of collapse zone per building construction book?
Tactics book?
full height of the wall
1 and a half times the height of the building
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Wall falls straight down
curtain wall collapse
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How many sprinkler heads is the cutoff before you can eliminate the FDC?
20
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External forces that act on a structure?
Loads
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More accurate term for pre-fire effort?
pre-fire analysis
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_____ squeezes, ______ stretches, and _____ twists
- Compression squeezes
- Tension stretches
- Torsional twists
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The building itself and anything permanently attactched
Dead load
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_____ loads can be calculated ____ loads cannot
- Dead loads can
- Live loads cannot
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NFPA ____ design load code
NFPA 5000
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Added water loads can add over ____ lbs when master streams are flowing
8000
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_____ loads- all in one area
concentrated loads
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applied slowly and remain constant
static loads
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_____ loads- applied intermittently
repeated loads
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_______ floors- designed to stiffen the building against wind and other lateral loads
diaphragm floors
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______ - diagonal braces between columns
K-bracing
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heavy riveting of girders
Portal bracing
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Externally braced buildings
Tube construction
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rectangular trusses w/ very rigid corners
Vierendeel trusses
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_____ load - force that is perpendicular or concentrated to one side
Eccentric load
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____ load - force passes through the centroid
Axial load
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The rate of available energy released
Heat release rate
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High-rises must be braced by the wind in one or more way:
- K-bracing
- Portal-bracing
- Tube Construction
- Vierendeel trusses
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_____ loads - produce dangerously high stresses
Lateral impact loads
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A structural member that transmits a compressive load along a straight path in the direction of the member
Column
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The result of force exerted by a beam on a support
Beam Reaction
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The distributing of loads along a beam
Beam loading
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Oldest structural member
beam
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When a beam is loaded it?
Deflects or bends downward
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Deflection causes the top to ____so it is in ____. And the bottom ____ thus it is in ____.
- top shortens so it is in compression
- bottom elongates thus it is in tension
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beams transfer loads _____ to ____
laterally to two supporting ends
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Simple beam
Supported at two points
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Continuous beam
Supported at 3 or more points
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a beam, often made of wood
joist
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Fixed Beam
Supported at 2 points and held rigidly in place
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Safety factor: Design load is
Half of the tested load
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Safety factor of steel is
2
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With the addition of of ___ concrete can withstand loads under tension
rebar
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A load can not be delivered to the ground in ___ must be ____
not in tension. must be compressive
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NFPA _____ : FIRE AND EXPLOSIVE INVESTIGTIONS
921
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Potential fuel available at a fire
Fire load
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Q is expressed in terms of:
watts, kilowatts, or megawatts
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Can carry a load that would require a larger compressive member
Slender Missle Member
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A term meaning 1000lbs
Kip
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The result of forces applied to a structure
stress and strain
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A series of closely spaced beams, carries heat loads
Grillage
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A beam that spans the opening in a masonry wall
Lintel
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Carries the load on the exterior of a framed building between the top of the window and the bottom of the window above
Spandrel girder
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