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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.

  3. Fire door - Wikipedia

    en.wikipedia.org/wiki/Fire_door

    Rated fire doors are tested to withstand an ASTM E119 standard time-temperature curve for a specified period. [9] There are 20, 30, 45, 60, and 90-minute-rated fire doors that are certified by an approved laboratory designated as a Nationally Recognized Testing Laboratory (NRTL, e.g., Underwriters Laboratories).

  4. Fire-resistance rating - Wikipedia

    en.wikipedia.org/wiki/Fire-resistance_rating

    This rating is the requirement in data safes and vault structures for protecting digital information on magnetic media or hard drives. Temperatures inside the protected chamber must be held below 125 °F (52 °C) for the time period specified, such as Class 125-2 Hour, with temperatures up to 2,000 °F (1,090 °C) outside the vault.

  5. WELL Building Standard - Wikipedia

    en.wikipedia.org/wiki/WELL_Building_Standard

    A01 Air Quality topic, the WELL conducts to limit level of particulate matter both PM2.5 and PM10 under 15 and 50 for normal region or 25 and 50 microgram/cubic metre or 30% of 24–48 hours average of outdoor levels for polluted region and thresholds for volatile organic compound (VOC) such as benzene, formaldehyde, toluene to 10, 50, and 300 ...

  6. Sliding glass door - Wikipedia

    en.wikipedia.org/wiki/Sliding_glass_door

    Sliding glass door frames are often made from wood, aluminum, stainless steel, or steel, which also have the most strength. The most common material is PVC plastic. Replacement parts are most commonly needed for the moving-sliding parts of the door, such as the steel rollers that glide within the track and the locking mechanisms.

  7. Noise-induced hearing loss - Wikipedia

    en.wikipedia.org/wiki/Noise-induced_hearing_loss

    [50] [51] People from ages to 6–19 have an approximately 15% rate of hearing loss. [43] Recommendations for musicians to protect their hearing were released in 2015 by NIOSH. [ 52 ] The recommendations emphasized education of musicians and those who work in or around the music industry.

  8. Tri-rated cable - Wikipedia

    en.wikipedia.org/wiki/Tri-rated_cable

    Tri-rated cable is a high temperature, flame retardant electrical wire designed for use inside electrical equipment. Tri-rated cable meets the requirements of three different international standards: BS 6231, UL 758, and CSA 22.2. [ 1 ]

  9. Minuteman Missile National Historic Site - Wikipedia

    en.wikipedia.org/wiki/Minuteman_Missile_National...

    It occupies 1.6 acres (6,000 m 2) nearly one-half mile (800 m) southwest of Interstate 90 at Exit 116 and six miles (9.7 km) from the town of Wall, South Dakota, in eastern Pennington County. It consists of an underground launch tube ("missile silo") 12 feet (3.7 m) in diameter and 80 feet (24.4 m) deep, made of reinforced concrete with a steel ...

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