The time in hours or fractions thereof that an opening protective and its assembly will withstand fire exposure as determined by a fire test made in conformity with specified standards of subchapter five of this chapter.
The time in hours or fractions thereof that an opening protective and its assembly will withstand fire exposure as determined by a fire test made in conformity with specified standards of subchapter five of this chapter.
Labels: 1 1968 Building Code, F
A compilation of New York City Permit Definitions