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8 Cards in this Set
- Front
- Back
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Timber used as a structural element is often oversized to provide a? |
Sacrificial layer |
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Floors divide buildings into usable areas, what other function do they fulfill |
They help support the walls |
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The fire resistance of reinforced concrete depends on 4 factors, what are they |
It’s total thickness The type of aggregate used The size of the reinforcing steel work. The thickness of the concrete covering the steelwork |
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The first signs of impending building collapse are often falling pieces of mortar or stone etc from walls. What are the other signs? |
Floors coming away from walls The collapse of floors Columns or beams bending or falling. Cracks in walls particularly horizontal cracks Bowing of walls, or walls out of vertical. Spalling of concrete. Collapse of arches above openings. Damage or collapse of the wall of a protective shaft |
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The effect of a fire on walls of a building can cause the building to collapse. What are the reasons a wall may become unstable. |
Cracked or dropped arches over windows, doors or other openings can lead to collapse. Expansion of the inner face of a wall due to heat bowing the wall out of vertical. Cracks in lower parts of the wall indicate danger. Collapse of beams or joists can lever walls of balance Walls can be made unstable by the collapse of floors leaving higher walls unsupported |
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Annotate a mansard roof |
Flatter pitch Steep pitch from eaves to room height |
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What are the hazards associated with sandwich panels |
PVC coating allows for rapid surface fire spread Heat conducts through sheet metal, rapidly degrading the core and causing extensive smoke production. Can release flammable and toxic gas. May collapse without warning. Faceplates may restrict the use of extinguishing media Sheets may fall away causing additional hazards |
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On leaving the evacuation signal, what 4 actions should firefighters take |
Repeat the signal Withdraw from the area as quickly and safely as possible Leave any equipment Report to the booking in point |
