CAN4-S112-M82

These requirements and methods of test apply to fire-damper assemblies rated 3/4h, 1h, l-1/2h, 2h, or 3h for use in air-conditioning and ventilating system ducts or openings (without ducts) piercing horizontally or vertically oriented fire separations where the fire separations are required to have a fire resistance rating of not more than 4h.