d Transmission Class ( STC ) Ratings

The ratings are determined for a fixed set of conditions and specs .

The performance ratings above were developed by Architectural Testing using applicable NFRC procedures for determining whole product performance .

Sound Transmission ( STC ): Measures how much sound comes through the entry . The higher the value , the more sound transmission is reduced .

Full Lite 22 ” x 80 ”

26 26 30 30 27 27 31 31 31 31 38 38 37 36 37 36 37

Full Lite 22 ” x 64 ”

29 29 30 30 28 28 29 32 32 32 38 38 39 37 37 37 37

1 / 2 ” Clear

1 / 2 ” Std Low-E

1 / 2 ” Clear GBG

1 / 2 ” Std Low-E GBG

1 ” Clear

1 ” Std Low-E

1 ” Std Low-E GBG

BBG Clear

( Raised )

BBG Low-E ( Raised )

BBG Clear

( Lowered )

Impact Clear

Impact Std Low-E

GBG

1 ” Protector

Clear

1 ” Protector CL-GBG

1 ”

1 ” Protector Protector Std Low-E Low-E-GBG

Sound Transmission Class ( STC ) Ratings

In Steel and Fiberglass Doors