Building Construction For The Fire Service Flashcards
Declaring a fire a “Structure Fire” indicates what?
That the buildings structure is involved and the gravity resistance system of the building is under attack.
3
A “Prefire Analysis” is a step beyond prefire planning, this allows fire personnel to do what?
To anticipate problems.
5
In general, what 4 types of forces can be applied to a buildings structural members?
Compression
Tension
Torsion
Shear
13
Regarding Buildings, Define Dead Load ( also called Self Weight)
The weight of the building itself and any equipment permanently attached to it, or built in.
14
Define Live Loads.
Any loads not permanently attached to the structure.
Any loads other than the dead loads.
15
Define Impact Loads.
Loads delivered over a short time.
SUDDEN IMPACT
20
Define Static Loads
Loads that are applied slowly and remain constant ( a heavy safe)
SLOW AND CONSTANT
21
Define Repeated Load
A load that is applied intermittently (rolling bridge crane)
BOUNCING REPEATEDLY
21
How are Axial and Eccentric loads different?
Axial loads transfer force through the center section. Eccentric loads do not transfer force through the center.
24
If a building itself is combustible, does the building add to the fire load?
Yes!!!
24
In a truss the top chord is in compression and the bottom chord is in tension. What happens to the truss when it is cantilevered?
The forces reverse.
Top = Tension
Bottom = Compression
33
Is it necessary for a Column to be in a vertical orientation?
No.
Any structural member that is compressively loaded can be a Column.
36
If a brick wall has header and stretcher courses, what does this likely indicate?
That the wall is load - bearing.
39
This type of mortar was used until about 1880. It could be washed out with water.
Sand Lime Mortar.
46
Steel heated to 1000°F will elongate how many inches per 100 feet?
9.5 inches
51
Pylons are driven through soft ground to bedrock. This forms a solid foundation for a building. Pylons are usually made of what?
Large timbers or wood.
82
What are caissons usually made from?
Concrete.
81
Define the sizes of each type of structural member.
Board
Dimensional Lumber
Timber
Board = less than or equal to 2in nominal thickness.
Dimensional Lumber = 2-4 in nominal thickness.
Timber = greater than or equal to 5in nominal thickness.
70
Define Nominal Thickness.
The thickness of Lumber prior to kiln drying.
70
OSB is made from wood pieces that are how long?
3-4 inches.
70
Concrete is composed of what 3 materials?
Portland Cement
Water
Aggregate
72
Structural Steel fails at what temperature range?
1,000-1,100°F
73
Cold Drawn Steel (Cables or Tendons in tensioned concrete) fails at what temperature?
800°F
73
What happens to Cast Iron that has-been heated then rapidly cooled by a hose stream?
It fails. Due to becoming brittle.
73
What type of fire conditions can melt Aluminum?
Typical fire temperatures
74
What is the main fire Hazard with EIFS (Exterior Insulation Finishing System) panels?
The outside panel falls if under fire conditions, exposing the combustible plastic insulation.
76
What is an area of a building that has fire rated smoke doors and can remain tenable for a period of time called?
Area of Refuge.
81
What is the major difference between Building Codes & Fire Codes?
Building Codes regulate the construction of a building.
Fire Codes regulate the use of a building after it is built.
87
Define a Model Code.
Complete Regulatory Codes that can be adopted by cities & states as they are written.
87
Define the 5 types of construction.
Type 1 = Fire resistive
Type 2 = Non-combustible
Type 3 = Ordinary
Type 4 = Heavy timber
Type 5 = Wood frame
88
What is the fire rating requirement for stairwells up to 3 stories VS 4 or more stories?
Up to 3 stories = 1 hour fire rating.
4 stories or more = 2 hour fire rating.
98
The Americans with Disabilities Act was passed in what year?
1990
101
What are the 4 parts of the Fire Tetrahedron?
Fuel
Heat
Uninhibited chemical chain reaction
Oxidizing agent
107
What are the 3 methods of heat transfer?
Conduction = within an object or between objects through direct contact.
Convection = transfer of heat through a gas or liquid
Radiation = transfer of heat through electromagnetic waves.
107
A fire that is not ventilation limited will pass through what 4 stages?
Incipient = initial stage after ignition
Free Burning = spreads to adjacent combustible material
Flash over = when exposed surfaces ignite simultaneously
Smoldering / Decay = glowing combustion takes place without combustion
108
Define Flameover.
When hot, unburned gases suddenly ignite.
108
Winds over what MPH range should become a tactical consideration at a fire scene?
10 - 20 MPH.
108
What are the 4 types of sprinkler systems?
Wet Pipe
Dry Pipe = air in the pipes. Used in freezing areas
Preaction = air in pipes but a separate detector must initiate water flow. Good where damage may occur.
Deluge = all heads are open, separate detector initiates water flow, mostly for flammable liquids
152
A ESFR (Early Suppression/ Fast Response) sprinkler head has what size orifice and can flow how many GPM?
3/4 inch orifice
100 GPM
164
According to the author of Building Construction, High Rise fires should be fought with what size hoselines?
What type of nozzle?
Why?
2 1/2 inch.
Smooth Bore.
Their reach, penetration and ability to operate at the lower operating pressure provided by standpipes
165
Carpet of fire in a corridor should be fought with a solid stream.
What technique should be used?
Why not use a fog stream?
Solid stream directed through the fire to wet the carpet beyond the fire, stopping extension.
Fog streams are known to push the fire down the corridor.
171
Emergency Power systems have __ seconds to provide power.
Standby Power systems have __ seconds to provide power,
Emergency Power = 10 seconds.
Standby Power = 60 seconds.
183
Large commercial boilers can provide up to ___ PSI for hot water.
160 PSI
184
What is one of the biggest issues with HVAC systems for firefighters?
The ability for smoke to be circulated throughout a building during a fire.
184
Natural gas mains may contain up to ___ psi.
Residential gas lines have regulators that cut the pressure down to ____ to ___ psi.
Commercial buildings may require pressures as high as _ psi to supply large equipment.
Mains 100 psi.
Residential 0.25 psi - 0.5 psi
Commercial buildings 5 psi
187
Hydraulic Elevators are typically limited to buildings of _ to _ stories.
5 to 6 stories
188
Describe Phase I, II & III Elevator operations
Phase I = elevator is recalled to a specific floor (usually the first floor lobby). Triggered by a smoke detector activation. When the elevator reaches the predetermined floor, its doors will open to let occupants out. Doors stay open for FF’s to use.
Phase II = Used by FF’s with a special key. Normally after Phase I brings the elevator down to the lobby.
Phase III = Used prior to Phase I by occupants for Evacuation. Special Elevator shafts that water & smoke protection. Also have communication systems.
190 & 191
On an Escalator, does pushing the “Emergency Stop” remove power from the system?
No. The main power disconnect is usually near the motor (top of escalator) under the inspection plate.
192
Refrigerants such as Freon were banned many years ago due to their effect on the environment. All new refrigerants are increasingly _________?
Flammable.
194
If Carbon Dioxide (CO2), typically used in restaurants, is leaking, where will it collect. Floor or ceiling?
Floor.
197
In terms of Wood Frame Construction. Define the term Legacy Construction.
The use of solid wood members as opposed to lightweight wooden trusses or I-joists.
205
How should a lightweight wood truss roof be accessed if it must be ventilated, while the roof itself is on fire?
Must use an aerial device.
214
What is the flammability range of CO?
12.5 % to 74%
214