*TB 25- Gymnasium Floor Fires Flashcards

1
Q

Gymnasium floors are constructed of tongue and groove hardwood, built up off of concrete on cross-laid strips to allow for ventilation under the floor. In essence, the floor is _____, with a metal angle sealing it to the wall.

A

Free floating

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2
Q

Gym floor fires:
Ventilated air passes beneath gymnasium floor plenums and into special heat/pump rooms where ____% of the-air is exhausted and ____% fresh air is drawn in and heated.

A

20 and 20%

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3
Q

During a gym floor fire and with the floor ventilation system left on, ____ % of air will be exhausted (smoke), with ____% being recirculated back into the gymnasium. The fire will be drawn throughout the floor by this forced draft.

A
  • 20%

* 80%

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4
Q

Gym floor fires:

If a fire should start in a gym floor the main power to the gymnasium must be ____

A

Shut off

This will prevent the ventilation system from force feeding the fire

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5
Q

Most construction members under a gym floor are spaced ___ inches on center.

A

18”

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6
Q

Gym floor fires:

What size is the metal angle iron used to seal the gym floor to the wall?

A

3”x3”x1/4”

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7
Q

Gym floor fires:

What size is the diagonal sub flooring used in gym floors? This flooring is under the hardwood tongue and groove floor.

A

1”x6”

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8
Q

Gym floor fires:

Air return grills for gym floor ventilation are located approx every ____ ft.

A

10

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9
Q

Gym floor fires:
Air is supplied for the gymnasium floor ventilating system by large fans which draw air into air return grilles located along the walls approximately ___ feet above the floor’s surface

A

2 ft

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