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  2. Perforated metal - Wikipedia

    en.wikipedia.org/wiki/Perforated_metal

    Studies have shown that perforated metals help reduce sound levels. [4] Studies have shown that having buildings use perforated metal sheets in front of their façade can bring in one study 29% energy savings (HVAC + Lighting estimated consumption in 1 year) and in the second one 45% energy savings (heating, ventilation, air conditioning).

  3. Hendrick Manufacturing Company - Wikipedia

    en.wikipedia.org/wiki/Hendrick_Manufacturing_Company

    Hendrick Manufacturing Company is an American perforated metal manufacturer founded in 1876 in Carbondale, Pennsylvania, where it is still based.Over the years, additional manufacturing locations were established in California, Tennessee, Kentucky and Illinois.

  4. Stairs - Wikipedia

    en.wikipedia.org/wiki/Stairs

    A stair flight is a run of stairs or steps between landings. A stairwell is a compartment extending vertically through a building in which stairs are placed. A stair hall is the stairs, landings, hallways, or other portions of the public hall through which it is necessary to pass when going from the entrance floor to the other floors of a building.

  5. Micro perforated plate - Wikipedia

    en.wikipedia.org/wiki/Micro_perforated_plate

    A micro perforated plate (MPP) is a device used to absorb sound, reducing its intensity. It consists of a thin flat plate, made from one of several different materials, with small holes punched in it. An MPP offers an alternative to traditional sound absorbers made from porous materials.

  6. Stair lift - Wikipedia

    en.wikipedia.org/wiki/Stair_lift

    Stair lifts are used by people of all ages and child car seats can usually be fixed a standard stair lift seat using the seat belt provided with the stair lift system. Many stair lifts are also fitted with a key, to allow the user to prevent others from using the lift. Codes of practice and technical specifications apply to stair lift manufacture.

  7. Perforated hardboard - Wikipedia

    en.wikipedia.org/wiki/Perforated_hardboard

    Perforated wood is more labor-intensive to manufacture and will warp and splinter under heavy loads, but is sometimes selected for aesthetic reasons. An inexpensive wood such as pine is often used, and it may be chemically treated for strength and fire retardant characteristics or turned into plywood first.

  8. Soffit - Wikipedia

    en.wikipedia.org/wiki/Soffit

    In this example the soffit material is 12 inches wide and made from center lanced U groove perforated sections of vinyl in a return fashion and fixed to the bottom chord of a truss roofing system extending beyond the exterior wall. A soffit is an exterior architectural feature, generally the horizontal, aloft underside of the roof edge.

  9. Perfboard - Wikipedia

    en.wikipedia.org/wiki/Perfboard

    Top of a copper clad Perfboard with solder pads for each hole. Perfboard is a material for prototyping electronic circuits.It is a thin, rigid sheet with holes pre-drilled at standard intervals across a grid, usually a square grid of 0.1 inches (2.54 mm) spacing.

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