Questions and Correct
Answers | New Update
Reinforced Concrete - ANSWER ✔✔internally fortified with steel
reinforcement bars (rebar) or wire mesh
- gives material compressive and tensile strength
- loses strength with cracks, spalling( when exposed to prolonged heat)
- prolonged exposure to chemicals causes steel reinforcement to
corrode before fire exposure or heat damage
Composite/Engineered Materials - ANSWER ✔✔cost effect and easy
to manufacture, often substituted for wood or steel framing
, - high structural strength
- corrosion resistance/resistance to chemical wear
- heat resistance
- engineered wood (wood fibers, plastics, joined by glue or resin) May be
highly combustible and rapidly deteriorate in fire. Could be plywood,
fiberboard, paneling, particle board, osb
Type 1 Collapse - ANSWER ✔✔High rises are not likely to collapse
- primary hazard concern is flying glass or curtain walls
Type 2 Collapse - ANSWER ✔✔Unprotected steel or noncombustible
supports (ex. I beams)
- At 1000℉ steel expands and twists, pushing walls out(constricts). This
movement causes floors and walls to collapse.
- Unprotected steel supports, brick and block walls, are prone to collapse
Type 3 Collapse - ANSWER ✔✔Ordinary Construction
- Exterior is made of concrete, brick, or masonry load bearing walls
- Interior is made of wood, masonry, unprotected steel carry interior
loads.