Fire-Rated Clear Glazed Door Systems Doors up to 4'x9' with up to 2,880 sq. in. of glass: Warnock Hersey (WH) label: 45 minutes Underwriters (UL) label: 20 minutes Fire-Rated Series CF Clear Glazed Lite Systems Single-pane hollow metal lite systems using Series CF frames with SuperLite II glazing material: (up to 32 sq. ft.) UL and WH labels: 45 minute SuperLite II Glazing Features Temperature rise (glazing) less then 250 degrees F. STC rating: 44 (glazing material)
