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  2. Sound transmission class - Wikipedia

    en.wikipedia.org/wiki/Sound_transmission_class

    Sound Transmission Class (or STC) is an integer rating of how well a building partition attenuates airborne sound. In the US, it is widely used to rate interior partitions, ceilings, floors, doors, windows and exterior wall configurations. Outside the US, the ISO Sound Reduction Index (SRI) is used. The STC rating very roughly reflects the ...

  3. National Fenestration Rating Council - Wikipedia

    en.wikipedia.org/wiki/National_Fenestration...

    The National Fenestration Rating Council (NFRC) is a United States 501 (c)3 non-profit organization which sponsors an energy efficiency certification and labeling program for windows, doors, and skylights. [1]

  4. Insulated glazing - Wikipedia

    en.wikipedia.org/wiki/Insulated_glazing

    EURO 68 wooden window profile with insulated glazing. Insulating glass ( IG) consists of two or more glass window panes separated by a space to reduce heat transfer across a part of the building envelope. A window with insulating glass is commonly known as double glazing or a double-paned window, triple glazing or a triple-paned window, or ...

  5. Firewall (construction) - Wikipedia

    en.wikipedia.org/wiki/Firewall_(construction)

    Firewall residential construction, separating the building into two separate residential units, and fire areas Example of a firewall used to inhibit the spread of a fire at an electrical substation. A firewall is a fire-resistant barrier used to prevent the spread of fire. Firewalls are built between or through buildings, structures, or ...

  6. Fire door - Wikipedia

    en.wikipedia.org/wiki/Fire_door

    Some fire doors are equipped with integral windows which also have a rating, or have been incorporated at the time of the door test and be subject to the overall door's product certification. Fire-resistive windows must remain intact under fire conditions and hose stream impact resistance, and can include: Wire mesh glass - usually Georgian wired

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