Brannigans Flashcards
Fire is defined as (brannigans)
Rapid oxidation reaction that produces heat and visible light
Autoexposure
Vertical spread from one floor to the floors above
Compartment fires (brannigans)
Incipient
Free burning
Flashover
Smoldering/decay
Neutral plane
Interface between the hot ceiling layer and the cooler air flowing into the compartment
Entrainment
Fresh air drawn into the fire from doorway
Flow path
Movement of hot fire gases/smoke from high pressure to low pressure
Aluminum melts at ___ and loses strength at ___
Melts at 1200 degrees
Loses strength at 350 degrees
Standpipe sister classes 1-3
Class 1 2.5 inch connection for ff
Class 2 standpipe provides 1.5 for building occupants or fire department
Class 3 1.5 inch AND 2.5 inch connections
Class 1 and 2 must provide ____ gpm at ___ psi
250 gpm at 100 psi
Heavy timber
Lumber that is 8 in or more in its smallest diameter
Joists
Floor beams
Legacy construction
Use of solid wood members instead of lightweight trusses and I beams
If co ppm X duration (minutes) = ____ or greater it is dangerous
33,000
Joist vs truss
Joist supports floors
Truss supports roof
Firestop vs draft stop
Firestop limits vertical movement
Draft stop limits horizontal movement
Fitch plate girders
Steel plate sandwiched between two solid sawn wood joints
6 types of type 5 wood frame structures
Log cabins, post and frame, balloon frame, platform frame, plank and beam, truss frame
Sole plate
Horizontal wood framing member at base of stud wall that studs are attached to
Chamfered column
Beveled corners
Heavy timber (type 4)
Can be Masonry load bearing walls and wood structural members
Chamfered column
Heavy timber column cut at an angle on each corner to make it more difficult for fire to ignite
Ordinary construction (type 3) (legacy)
Brick and wood joisted construction (masonry exterior walls with combustible frame member)
Masonry bearing walls with wood joists used as simple beams spanning from wall to wall
Girder
A beam supporting another beam
Cantilever walls
Precast concrete walls, unsecured at the top, dependant on roof for stability
Wythe
Vertical section of wall one brick or masonry unit thick
Lintel
Carry weight above an opening
Fire cut
End of beam cut at an angle so beam can fall out of the wall
CO flammability range
12.5-74 percent
Ignition temp 1128
Masonry buildings with spans greater than ____ ft must have interior bearing walls
25 ft
Type 2 (noncombustible)
Unprotected steel frame
1-3 stories max of 12 stories
Substantial elongation of steel ____ degrees
1000 degrees
Steel completely fail
1300 degrees
Cold drawn steel for tensioned concrete or excavation tiebacks can fail at ____ degrees
800 degrees
Four types of steel structures
Unprotected
Dynamically protected
Passively protected
Passive/dynamic combination protection
Purlin
Horizontal structural member in a roof (at right angle to trusses)
Rakers
Diagonal columns that brace entire structure
Spandrel space
Distance between top of one window and bottom of the window above it
Transfer beam
Used to laterally relocate vertical loads of columns
Problems with concrete construction
Collapse during construction
Fire during construction
Fire in completed buildings
Ally columns
Steel pipes filled with concrete
Monolithic construction
All concrete in a building is properly bonded together
Steel has ____ times more compressive strength than concrete
15 times
Complete loss of prestress for prestress concrete ____ degrees
800 degrees
Benefits of ___ construction is that it lacks inherent voids
Type 1
Two basic types of concrete construction
Cast in place, precast
Strands (Also referred to as cables or tendons)
High strength cold drawn steel cables used to apply tension to concrete
Pv roof panel (module)
Contains many semiconductor cells
Group of modules is an array
If sun is shinning pv panels will be energized t or f
T
