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5.0234 FLAME-SPREAD CLASSIFICATION<br />
A. Flame-spread classification (FSC) is a comparative rating of the measure of<br />
flame-spread on a surface of a material or assembly as determined under<br />
conditions of tests and performance as specified in ASTM E-84, as amended.<br />
B. Class A interior finish includes any material classified at twenty-five (25) or<br />
less on the flame-spread test scale and four hundred fifty (450) or less on the<br />
smoke scale in accordance with ASTM E-84, Test of Surface Burning<br />
Characteristics of Building Materials, as amended.<br />
C. Class B. interior finish includes any materials classified at more than twentyfive<br />
(25) but not more than seventy-five (75) on the flame-spread test scale and<br />
four hundred fifty (450) or less on the smoke test scale in accordance with<br />
ASTM E-84, Test of Surface Burning Characteristics of Building Materials, as<br />
amended.<br />
D. Class C interior finish includes any materials classified at more than<br />
seventy-five (75) but not more than two hundred (200) on the flame-spread test<br />
scale and four hundred fifty (45) or less on the smoke test scale in accordance<br />
with ASTM E-84, Test of Surface Burning Characteristics of Building<br />
Materials, as amended.<br />
E. Class I interior floor finish includes any material with a minimum critical<br />
radiant flux of forty-five hundredths (0.45) watts per square centimeter as<br />
determined in accordance with ASTM E-648, Test for Critical Radiant Flux of<br />
Floor Covering Systems Using a Radiant Heat Energy Source, as amended.<br />
F. Class II interior floor finish includes any material with a minimum critical<br />
radiant flux of twenty-two-hundredths (0.22) watts per square centimeter as<br />
determined in accordance with ASTM E-648, Standard Method of Test for<br />
Critical Radiant Flux of Floor Covering Systems Using a Radiant Heat Energy<br />
Source, as amended.<br />
5.0235 ATRIUM FURNISHHINGS<br />
A. Atriums are defined as a floor opening two (2) or more stories that are covered<br />
at the top of the series of openings and is used for purposes other than an enclosed<br />
stairway, elevator hoistway or utility shaft used for plumbing, electrical, air<br />
conditioning or communication facilities.<br />
City of Marinette<br />
21<br />
Code of Ordinances