Frame Construction (ISO)
Definition
Frame Construction (ISO) — one of six building construction categories established by Insurance Services
Office, Inc. (ISO), in its Commercial Lines Manual (CLM) for purposes
of developing rates for insuring commercial property, based on susceptibility
to damage by fire. The CLM description of frame construction, followed
by the associated ISO construction code, is exterior walls of wood, brick
veneer, stone veneer, wood ironclad, or stucco on wood (Construction Code 1).
The construction code indicates the ranking of this building construction
category within the six categories, with 1 as the least fire-resistive and 6 as
the most fire-resistive.