noncombustible construction
Exterior walls, floor, and supports made of metal, asbestos, gypsum, or other
noncombustible materials. This is one of six basic construction types used in
categorizing buildings for Insurance Services Office, Inc. (ISO),
Commercial
Lines Manual (CLM) for rating purposes. The other five construction categories
are: frame, joisted masonry, masonry noncombustible, modified fire-resistive,
and fire-resistive.