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  2. Rafter - Wikipedia

    en.wikipedia.org/wiki/Rafter

    Coyau or sprocket. Labeled A. A rafter is one of a series of sloped structural members such as steel beams that extend from the ridge or hip to the wall plate, downslope perimeter or eave, and that are designed to support the roof shingles, roof deck, roof covering and its associated loads. [2] A pair of rafters is called a couple.

  3. Purlin - Wikipedia

    en.wikipedia.org/wiki/Purlin

    A purlin (or historically purline, purloyne, purling, perling) is a longitudinal, horizontal, structural member in a roof. In traditional timber framing there are three basic types of purlin: purlin plate, principal purlin, and common purlin. Purlins also appear in steel frame construction. Steel purlins may be painted or greased for protection ...

  4. Post (structural) - Wikipedia

    en.wikipedia.org/wiki/Post_(structural)

    A single, central post in a roof truss in tension between the rafters and a tie beam (bottom chord), or 2) (U.S.) A short of the tie beam only supporting the rafters via struts. 3) (U.K.) A king post specifically carries a ridge beam otherwise is called a king strut. "King post" was formerly used to describe a crown post in the U. K., but no ...

  5. Framing (construction) - Wikipedia

    en.wikipedia.org/wiki/Framing_(construction)

    Framing (construction) Framing side by side units. The erection of a wooden frame in Sabah, Malaysia. Framing, in construction, is the fitting together of pieces to give a structure support and shape. [1] Framing materials are usually wood, engineered wood, or structural steel. The alternative to framed construction is generally called mass ...

  6. Open web steel joist - Wikipedia

    en.wikipedia.org/wiki/Open_web_steel_joist

    In structural engineering, the open web steel joist (OWSJ) is a lightweight steel truss consisting, in the standard form, of parallel chords and a triangulated web system, proportioned to span between bearing points. The main function of an OWSJ is to provide direct support for roof or floor deck and to transfer the load imposed on the deck to ...

  7. Cross bracing - Wikipedia

    en.wikipedia.org/wiki/Cross_bracing

    Cross bracing on a bridge tower. In construction, cross bracing is a system utilized to reinforce building structures in which diagonal supports intersect. Cross bracing is usually seen with two diagonal supports placed in an X-shaped manner. Under lateral force (such as wind or seismic activity) one brace will be under tension while the other ...

  8. Timber roof truss - Wikipedia

    en.wikipedia.org/wiki/Timber_roof_truss

    This is an example of a "double roof" with principal rafters and common rafters. A timber roof truss is a structural framework of timbers designed to bridge the space above a room and to provide support for a roof. Trusses usually occur at regular intervals, linked by longitudinal timbers such as purlins. The space between each truss is known ...

  9. Steel square - Wikipedia

    en.wikipedia.org/wiki/Steel_square

    Plumb bob. The steel square is a tool used in carpentry. Carpenters use various tools to lay out structures that are square (that is, built at accurately measured right angles ), many of which are made of steel, but the name steel square refers to a specific long-armed square that has additional uses for measurement, especially of various angles.

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