Taxpayer1 Flashcards
(86 cards)
At taxpayers the stability of masonry walls depends on the being concentrated in what direction through the wall?
Vertical direction
What are 3 reasons you give a second alarm at a taxpayer ?
Store fire with extension to cockloft
Store fire with extension to a exposure
An advanced fire in the cellar
At 1000 degrees a 100 ft steel I beam will expand ?
9 1/2 inches
At 970 degrees a 50 ft long steel I beam will expand how much?
4 inches
On average in fire conditions how long does cast iron columns collapse?
30 minutes
Which is more serious if it collapses a girder or a column?
Column more serious
Which is worst to collapse a bearing wall or a column?
Bearing wall worst
Where are outside cellar stairs usually found at taxpayers?
In the rear of the bldg
When are roll down gates at a fire more dangerous when there up or down?
Up all weight in one place
How would you secure a roll down gate after you have gotten it open at a fire?
Clamping vise grip pliers in the track under the roller or use a ladder to hold up gate
A waring sign of a collapse potential at a taxpayer would be a heavy body of fire burning out of control for _____ minutes.
20 minutes
At a taxpayer fire if you see walls leaking smoke or water what would this indicate to you?
Possibly collapse warning sign
How much does 1 cubic foot of brick weight?
100 pounds
Inability to make successful headway against a heavy fire conditions within how long in the fire would be a possible indicator of a collapse?
20 minutes
When you have a fire in a smoke shop what is the recommended method of fighting the fire?
2 1/2 consider knocking down the fire from the sidewalk first
What are three basic factors necessary for a back draft?
Combustibles oxygen heat
Can a decorative metal cornice be removed on older taxpayers built in the 1920’s ?
Yes
What’s the most prevalent type of taxpayers ?
1920-1960
Can the cornice of a taxpayer built between 1920- 1960 be removed ?
Most cases will not provide access to the cockloft
What is the size of a cockloft in a taxpayer?
4” to more than 6 ft
What type of truss is prevalent in modern taxpayer construction?
LW parallel chord truss
Which chord of the bowstring truss was mis calculated?
Bottom chord
The bowstring truss was miscalculated by how much?
Miscalculated by 60%
Bottom chord
Roofs may only support 40% of weight originally calculated for
The bottom chords of bow string truss roofs have inadequate ?
Tensile strength