Flashcards in Lesson Plan 13 Fireground Structural Collapse Deck (22):
A detailed prefire plan, combined with ______ ____ _____ _____, _____ _____, and sound judgment will enable command personnel to better protect firefighters from the danger of bldg collapse.
knowledge of bldg contruction, fire behavior
Above all, structural collapse stresses the need ____ ________ ______
for prefire planning
What must be among the structures surveyed for pre-fire planning
industrial, commercial, institutional occupancies and placed of public assembly
Bldg characteristics that should be noted in prefire plans include:
Type of Construction
Size of bldg
Year of construction
Renovations that have taken place and when
Type of occupancy
What are the types of construction
Type I (fire resistive construction)
Type II (Non-combustive or Limited Combustible construction
Type III (Ordinary) Construction
Type IV (Heavy Timber) Construction
Type V (Wood-framed) Construction
What is included with size of bldg as a characteristic noted in prefire plan
# of stories
The prefire plan should include means of ____/_____, features that will aid in ______ ______ to limit fire spread, locations of areas that can endanger firefighters, and locations of _____ _____.
access/egress; vertical ventilation; concealed spaces
Most likely to fail under fire conditions are bldgs of _____ _____, ____ ____ construction, and _______ construction.
unprotected noncombustible construction; wood framed; ordinary
Lightweight truss assemblies are extremely dangerous to firefighters since these assemblies can fail and collapse after as little as _____ minutes of fire involvement.
Ordinary construction can be defined as ______ loads which are carried by ______ and interior loads which are carried on ______, ______, or unprotected ______.
exterior; masonry; wood; masonry; steel
In lightweight construction, some pre-fabricated wood trussed are ______ at their ______ by _____ _____ ______.
attached; joints; metal gusset plates
Metal gusset plates replace nails and fail _____ _____ under fire conditions because they act as ____ _____ and they are not as _____ _____ in the wood.
more quickly; heat collectors; deeply imbedded
Unprotected steel construction, when heated to temperatures of ____ to ______ F, will lose _____, ____, and ______ ______
800 degrees to 1400 degrees; strength, expand, and usually fail
A _____ foot section of steel I-beam can lengthen as much as _____ _____ when heated only to _____ F.
100; 9 inches; 1000 degrees
For Masonry construction, if stars, plates, or other designs are placed in a _______ ________, they are probably _____ __ _______ which were designed into the original bldg to secure the ____ ____ to the _____ walls.
geometrical pattern; beam end tie-ins; floor joists; exterior
Situational awareness- On the fireground, firefighters should be observant not only for _____ __ ______, but for ____ ____ _____ as well.
threats of collapse; routes of escapes
List some of the 5 obvious signs of imminent collapse
-Cracking or bulging walls
-Water or smoke coming through the walls
-Twisted or warped columns/beams
-Floors sagging / pulling away from the walls
A ____ gpm stream can deliver a ____ of water per minute and a _____ gpm stream can add _____ ____ in a minute.
250; ton; 750; 3 tons
A bldg of ordinary construction that is well involved on arrival, the IC should consider _______ all firefighting personnel within _____ ___ _____ ____ from the time of the initial alarm, if interior crews are not _____ _____.
withdrawing; 10 to 12 minutes; making progress
Ordinary construction can fail in as little as ____ ____
Collapse Rescue operations should listen for calls for help, the sounding of ____ _____ ____ _____, or ____ ______.
PASS (Personal Alerting and Safety System) devices; radio transmissions