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  2. Dropped ceiling - Wikipedia

    en.wikipedia.org/wiki/Dropped_ceiling

    The primary grid types are "Standard 1" (15 ⁄ 16-inch face), Slimline (9 ⁄ 16-inch grid), and concealed grid. In the United States and its neighboring countries, the cell size in the suspension grids is typically either 2 by 2 feet (610 mm × 610 mm) or 2 by 4 feet (610 mm × 1,220 mm), and the ceiling tiles, light fixtures, and fluorescent ...

  3. USG Corporation - Wikipedia

    en.wikipedia.org/wiki/USG_Corporation

    USG Corporation, also known as United States Gypsum Corporation, is an American company which manufactures construction materials, most notably drywall and joint compound. The company is the largest distributor of wallboard in the United States and the largest manufacturer of gypsum products in North America.

  4. Drywall - Wikipedia

    en.wikipedia.org/wiki/Drywall

    Various sized cuts of 1 ⁄ 2 in (13 mm) drywall with tools for maintenance and installation . Drywall (also called plasterboard, dry lining, [1] wallboard, sheet rock, gib board, gypsum board, buster board, turtles board, slap board, custard board, gypsum panel and gyprock) is a panel made of calcium sulfate dihydrate (), with or without additives, typically extruded between thick sheets of ...

  5. Gridshell - Wikipedia

    en.wikipedia.org/wiki/Gridshell

    The steel gridshell by Vladimir Shukhov (during construction), Vyksa near Nizhny Novgorod, 1897 Multihalle in Mannheim, a wooden gridshell structure designed by Frei Otto Interior of the gridshell Savill Building Solidays Forum: a 350 m 2 glassfibre composite material elastic gridshell, Paris, France, 2011 Ephemeral Cathedral: a 400 m 2 glassfibre composite material elastic gridshell, Créteil ...

  6. Piping and instrumentation diagram - Wikipedia

    en.wikipedia.org/wiki/Piping_and_instrumentation...

    Piping and instrumentation diagram of pump with storage tank. Symbols according to EN ISO 10628 and EN 62424. A more complex example of a P&ID. A piping and instrumentation diagram (P&ID) is defined as follows: A diagram which shows the interconnection of process equipment and the instrumentation used to control the process.

  7. Ceiling - Wikipedia

    en.wikipedia.org/wiki/Ceiling

    A subset of the dropped ceiling is the suspended ceiling, wherein a network of aluminum struts, as opposed to drywall, are attached to the joists, forming a series of rectangular spaces. Individual pieces of cardboard are then placed inside the bottom of those spaces so that the outer side of the cardboard, interspersed with aluminum rails, is ...

  8. Insulating concrete form - Wikipedia

    en.wikipedia.org/wiki/Insulating_concrete_form

    The first expanded polystyrene ICF Wall forms were developed in the late 1960s with the expiration of the original patent and the advent of modern foam plastics by BASF. [citation needed] Canadian contractor Werner Gregori filed the first patent for a foam concrete form in 1966 with a block "measuring 16 inches high by 48 inches long with a tongue-and-groove interlock, metal ties, and a waffle ...

  9. Grid-tie inverter - Wikipedia

    en.wikipedia.org/wiki/Grid-tie_inverter

    The grid tie inverter (GTI) must match the phase of the grid and maintain the output voltage slightly higher than the grid voltage at any instant. A high-quality modern grid-tie inverter has a fixed unity power factor, which means its output voltage and current are perfectly lined up, and its phase angle is within 1° of the AC power grid. The ...