What is the difference between Class 1 and Time-hour rated?
A. Class 1 designates the material’s surface burning characteristics when tested in accordance with UL723, ASTM-E84-01 and CAN/ULCS102.2. The governing building codes such as NFPA, UBC, BOCA and SBCCI mandate that all building materials, even trims, carry a minimum of a Class III rating. Acrovyn is Class 1, signifying a much lower flame spread rating than required by Code. Time rating is the appropriate designation for those products applied onto or into equally rated doors and walls. Applying a material that is not time-rated to a rated wall, door and/or door frame will negate the rating of assembly.
A. Class 1 designates the material’s surface burning characteristics when tested in accordance with UL723, ASTM-E84-01 and CAN/ULCS102.2. The governing building codes such as NFPA, UBC, BOCA and SBCCI mandate that all building materials, even trims, carry a minimum of a Class III rating. Acrovyn is Class 1, signifying a much lower flame spread rating than required by Code.
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