Section 27-274
§ 27-274 Classification. Buildings or spaces in noncombustible
construction group I are those in which the walls, exitways, shafts,
structural members, floors, and roofs are constructed of noncombustible
materials and assemblies affording the fire-resistance ratings specified
in table 3-4. The noncombustible construction group I consists of
classes I-A, I-B, I-C, I-D, and I-E.
Section 27-275
§ 27-275 Construction class I-A. Includes buildings and spaces in
which the bearing walls and other major structural elements are
generally of four-hour fire-resistance rating.
Section 27-276
§ 27-276 Construction class I-B. Includes buildings and spaces in
which the bearing walls and other major structural elements are
generally of three-hour fire-resistance rating.
Section 27-277
§ 27-277 Construction class I-C. Includes buildings and spaces in
which the bearing walls and other major structural elements are
generally of two-hour fire-resistance rating.
Section 27-278
§ 27-278 Construction class I-D. Includes buildings and spaces in
which the bearing walls and other major structural elements are
generally of one-hour fire-resistance rating.
Section 27-279
§ 27-279 Construction class I-E. Includes buildings and spaces in
which the bearing walls and other major structural elements generally
have no fire-resistance rating.
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