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  2. 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 ...

  3. 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 ...

  4. Penrose tiling - Wikipedia

    en.wikipedia.org/wiki/Penrose_tiling

    B-tiles can be related to such A-tiles in two ways: If B S has the same size as A L then B L is an enlarged version φ A S of A S, with side lengths (φ, φ, φ 2 = 1 + φ) – this decomposes into an A L tile and A S tile joined along a common side of length 1. If instead B L is identified with A S, then B S is a reduced version (1/ φ)A L of ...

  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. 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.

  7. 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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