masonry noncombustible construction
Exterior walls of masonry material (adobe, brick, concrete, gypsum block,
hollow concrete block, stone, tile, or similar materials), with floor and roof
of metal 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) rating purposes. The other five construction categories
are frame, joisted masonry, noncombustible, modified fire-resistive, and fire-resistive.