Light Noncombustible

Construction types

Light noncombustible (ISO Class 3, IBC Type IIB)

Light Noncombustible construction is ISO Class 3. ISO Class 3 encompasses IBC Type IIB (unprotected).

Familiarize yourself with the elements of Light Non Combustible construction. 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

Be aware of the noncombustible advantages:
easy to erect
economical to build
uses materials that don’t readily burn

Note the noncombustible disadvantages:
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

Scroll to Top