Page 17 - LEARN NOT TO BURN MAGAZINE by STEM XII-Group 5

STRUCTURAL Types I and II

FRAME construction must only

have non-combustible

lthough the buiding elements, except as

A combustibility of permitted in Section 603.

building materials is Type III construction must

important in determining have non-combustible or

levels of safety, the fire-retardant-treated wood

expected response that a (FRTW) exterior walls, while

building will have in a fire combustible or materials

condition is vital to may be used for interior

determining equivalent elements

risk, Type IV. often called Heavy

which is fundamental to Timber (HT) construction,

the IBC The code classifies has exterior walls made of

structures by type of noncombustible materials,

construction in an effort to cross laminated timber

account for the expected (CLT) or FRTW, and interior

response that building building elements made of

elements will have in a fire. solid or bminated timber

The IBC defines five main without concealed spaces.

types of construction: Type V construction allows

Types I, II, III, IV' and V. For the use of both

each, it specifies the noncombustible and

materials permitted and combustible materials in

minimum fire-resistance structural elements and

ratings associated with the exterior and interior

various structural walls

members.

15 Learn Not to Burn DECEMBER 2020