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  2. Dropped ceiling - Wikipedia

    en.wikipedia.org/wiki/Dropped_ceiling

    An older, less common type of dropped ceiling is the concealed grid system, which uses a method of interlocking panels into one another and the grid with the use of small strips of metal called 'splines', thus making it difficult to remove panels to gain access above the ceiling without damaging the installation or the panels. Normally, they ...

  3. Glossary of woodworking - Wikipedia

    en.wikipedia.org/wiki/Glossary_of_woodworking

    The tendency for wood that is being cut to direct the saw parallel to its grain. lath. Also called a slat. A thin, narrow strip of straight-grained wood, typically arranged side-by-side with others and used to support roof shingles or tiles, as a backing material for plaster or stucco in walls and ceilings, or in lattice and trellis frameworks ...

  4. Glaze defects - Wikipedia

    en.wikipedia.org/wiki/Glaze_defects

    Crazing is a spider web pattern of cracks penetrating the glaze. It is caused by tensile stresses greater than the glaze is able to withstand. [1] [2] Common reasons for such stresses are: a mismatch between the thermal expansions of glaze and body; from moisture expansion of the body; and in the case of glazed tiles fixed to a wall, movement of the wall or of the bonding material used to fix ...

  5. Lumber - Wikipedia

    en.wikipedia.org/wiki/Lumber

    The wood moisture content is above 25% on a dry-weight basis; The environment is sufficiently warm; Oxygen (O 2) is present; Wood with less than 25% moisture (dry weight basis) can remain free of decay for centuries. Similarly, wood submerged in water may not be attacked by fungi if the amount of oxygen is inadequate. Fungi lumber/timber ...

  6. Tile - Wikipedia

    en.wikipedia.org/wiki/Tile

    Mineral fiber tiles are fabricated from a range of products; wet felt tiles can be manufactured from perlite, mineral wool, and fibers from recycled paper; stone wool tiles are created by combining molten stone and binders which is then spun to create the tile; gypsum tiles are based on the soft mineral and then finished with vinyl, paper or a ...

  7. Girih tiles - Wikipedia

    en.wikipedia.org/wiki/Girih_tiles

    Girih tiles are a set of five tiles that were used in the creation of Islamic geometric patterns using strapwork for decoration of buildings in Islamic architecture. They have been used since about the year 1200 and their arrangements found significant improvement starting with the Darb-i Imam shrine in Isfahan in Iran built in 1453.

  8. Punji stick - Wikipedia

    en.wikipedia.org/wiki/Punji_stick

    It is a simple spike, made out of wood or bamboo, which is sharpened, heated, and usually set in a hole. Punji sticks are usually deployed in substantial numbers. [ 1 ] The Oxford English Dictionary (third edition, 2007) lists less frequent, earlier spellings for "punji stake (or stick)": panja, panjee, panjie, panji , and punge .

  9. Tessellation - Wikipedia

    en.wikipedia.org/wiki/Tessellation

    A normal tiling is a tessellation for which every tile is topologically equivalent to a disk, the intersection of any two tiles is a connected set or the empty set, and all tiles are uniformly bounded. This means that a single circumscribing radius and a single inscribing radius can be used for all the tiles in the whole tiling; the condition ...

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