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  2. Door security - Wikipedia

    en.wikipedia.org/wiki/Door_security

    Solid wood doors withstood more force than the very common metal skinned wood-edged doors used in newer construction. A broad range door manufacturer, Premdor (now Masonite) once stated in one of its 1990s brochures entitled "Premdor Entry Systems" page 6 that "The results of tests were overwhelming, Steel edged doors outperform wood-edged ...

  3. Manhole cover - Wikipedia

    en.wikipedia.org/wiki/Manhole_cover

    A manhole cover is a removable plate forming the lid over the opening of a manhole, an opening large enough for a person to pass through that is used as an access point for an underground vault or pipe. It is designed to prevent anyone or anything from falling in, and to keep out unauthorized persons and material.

  4. Retractable roof - Wikipedia

    en.wikipedia.org/wiki/Retractable_roof

    The arena's dome-shaped roof covered 170,000 square feet (16,000 m 2) and was made up of eight equal segments constructed from close to 3,000 tons of steel, in which six segments could retract underneath the remaining two, supported by a 260-foot (79 m) long exterior cantilevered arm.

  5. High-speed steel - Wikipedia

    en.wikipedia.org/wiki/High-speed_steel

    High-speed steel (HSS or HS) is a subset of tool steels, commonly used as cutting tool material. It is superior to high-carbon steel tools in that it can withstand higher temperatures without losing its temper (hardness). This property allows HSS to cut faster than high carbon steel, hence the name high-speed steel.

  6. Removable partial denture - Wikipedia

    en.wikipedia.org/wiki/Removable_partial_denture

    A removable partial denture (RPD) is a denture for a partially edentulous patient who desires to have replacement teeth for functional or aesthetic reasons and who cannot have a bridge (a fixed partial denture) for any reason, such as a lack of required teeth to serve as support for a bridge (i.e. distal abutments) or financial limitations.

  7. Targa top - Wikipedia

    en.wikipedia.org/wiki/Targa_top

    Any piece of normally fixed metal or trim which rises up from one side, over the roof and down the other side is sometimes called a targa band, targa bar, or wrapover band. Targa tops are different from T-tops , which have a solid, non-removable bar running between the top of the windscreen and the rear roll-bar, and generally have two separate ...

  8. Fire door - Wikipedia

    en.wikipedia.org/wiki/Fire_door

    Fire-resistance rated door, with wire mesh glass vision panel Industrial grade fire door rated to hydrocarbon curve and blast resistance Double fire door immediately after 3-hour fire test inside a 4-hour rated Durasteel wall Double fire door after 3-hour fire test in a 4-hour Durasteel wall, during successful 45PSI (3.1 bar) hose stream test leading to a UL Listing [1]

  9. Mountain Hardwear - Wikipedia

    en.wikipedia.org/wiki/Mountain_Hardwear

    Mountain Hardwear was founded in 1993 in Richmond, California by a small group of former employees of Sierra Designs led by Jack Gilbert. Soon after, Mountain Hardwear's first sponsored athlete, Ed Viesturs, the first American to climb all fourteen 8,000 meter peaks, helped develop several of the company's products. [1]