Construction types
Light Noncombustible construction is ISO Class 3. ISO Class 3 encompasses IBC Type IIB (unprotected).
Light Non Combustible buildings are buildings with exterior walls of light metal or other Noncombustible material and with Noncombustible floors and roofs:
buildings with exterior walls, floors, and roofs of noncombustible or slow-burning materials
building supports of noncombustible or slow-burning materials
noncombustible or slow-burning roof decks on noncombustible or slow-burning supports — regardless of the type of insulation on the roof surface
noncombustible
advantages:
easy to erect
economical to build
uses materials that
don’t readily burn
contains steel, which looses strength at high temperatures
highly damageable buildings
unstable buildings under fire conditions
uses slow-burning materials that do burn — adding fuel to a fire