Chapter 4 Flashcards
Stairs that are not part of means of egress are often to referred to as What?
Typically these stairs are open and connect only two levels per code limitations
Convenience Stairs
Prefabricated Stairs can be made using lightweight materials and techniques. what is a know hazard to fire fighters with these kind of stairs,
that when a metal gusset fails or any part of the assembly fails the whole stair assembly is compromised
What Stairs Have an intermediate landing between floors and reverse directions at that point
Return Stairs
What stairs are two separate sets of stairs constructed in a common shaft Scissor stairs
Scissor stairs
Buildings that often include scissor stairs are (4)
Airport terminals
Convention centers
Malls
Cinema complexes
What set of stairs are found as grand stairs or convenience stairs serving only two levels, with the minimum width of the run is usually 10 inches
Circular Stairs
What set of stairs consist of a series of steps spiraling around a single column to fit in a very small space, each tread is tapered and connects to the column at the treads narrow end
Spiral Stairs
What set of stairs are actually ladders used to provide access to an attic space that dose not have permanent access to it
Folding Stairs
Common hazard with Folding stairs that firefighters should know
That the springs of the folding stairs lose tension rapidly when exposed to heat and also
gas springs that replace springs in the folding stairs can fail with explosive force when exposed to fire temperatures
When some buildings use fixed ladders also know as ships ladder in similar applications to provide access a to what areas of the building including
Mechanical spaces
Roof hatches at the top of stairways
Between roof levels with portions at different elevations
what are stairs called that must resist the effects of products of combustion
Protected stairs
Exit stairs as means of egress features (3)
Fire Resistance rating of the enclosure
Separation when exterior stairs are utilized
Features to ensure safety during both non emergency and emergency use
4 measures indicated in building code to protect stair enclosures include
Limited penetrations in the enclosure for light fire protections and environmental control
Required self or automatic closing fire rated doors
Separation from the rest of the building
Stairway vestibules
What set of stairs are naturally ventilated on one or more sides and when fully enclosed are subjected to the same regulations as enclosed stairs
Exterior Stairs
Building codes have traditionally required A minimum of one of “what kind of stairs” for serving buildings with five stories or more and more recently codes also require protection for stairs serving floor levels more than 30 feel below the level of exit discharge
Smokeproof stair enclosure
What kind of fire protection Uses moving mechanical or electric parts that work as a system and require a power source for operation
Active fire protection
What kind of fire Protection Dose not require any system activation or movement it relies on building construction and materials to contain fire or products of combustion
Passive Fire Protection
In high rise structures codes require what kind of dedicated stairways designed solely to provide firefighters a safe route to access and attack a fire
Pressurized stairways
What type of enclosures is used to protect the stairway enclosure and provide a means of smoke ventilation before the smoke enters the stair enclosure
Passive Smokeproof enclosure
When a building code allows the use of what kind of stairs when they only connect no more than two adjacent floors above the basement level
Open Stairs
3 Features protecting conveyor systems that penetrate fire barriers are
Fire doors
Shutters
Water spray fixed fire suppression systems
Escalator speeds are standardized at
100 Feet per minute
Older Escalator speeds are
90 to 120 feet per minute
2 of the most common protection for vertical openings for escalators that serve more then two floors are
Draft stops 18in deep
Closely paced sprinklers
