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  2. Batter board - Wikipedia

    en.wikipedia.org/wiki/Batter_board

    Batter boards (or battre boards, Sometimes mispronounced as "battle boads") are temporary frames, set beyond the corners of a planned foundation at precise elevations. These batter boards [ 1 ] are then used to hold layout lines (construction twine) to indicate the limits [ 2 ] (edges and corners) of the foundation.

  3. Stairs - Wikipedia

    en.wikipedia.org/wiki/Stairs

    Stringer board, stringer, or sometimes just string: The structural member that supports the treads and risers in standard staircases. There are typically three stringers, one on either side and one in the center, with more added as necessary for wider spans. Side stringers are sometimes dadoed to receive risers and treads for increased support ...

  4. Strongback (girder) - Wikipedia

    en.wikipedia.org/wiki/Strongback_(girder)

    A strongback is a beam or girder which acts as a secondary support member to an existing structure. A strongback in a staircase is usually ordinary two-by dimensional lumber attached to the staircase stringers to stiffen the assembly.

  5. Ladder - Wikipedia

    en.wikipedia.org/wiki/Ladder

    An extension ladder. A ladder is a vertical or inclined set of rungs or steps commonly used for climbing or descending. There are two types: rigid ladders that are self-supporting or that may be leaned against a vertical surface such as a wall, and rollable ladders, such as those made of rope or aluminium, that may be hung from the top.

  6. Flexural rigidity - Wikipedia

    en.wikipedia.org/wiki/Flexural_rigidity

    However, in cases of non-prismatic members, such as the case of the tapered beams or columns or notched stair stringers, the flexural rigidity will vary along the length of the beam as well. The flexural rigidity, moment, and transverse displacement are related by the following equation along the length of the rod, x {\displaystyle x} :

  7. Stringer - Wikipedia

    en.wikipedia.org/wiki/Stringer

    Stringer (aircraft), or longeron, a strip of wood or metal to which the skin of an aircraft is fastened; Stringer (slag), an inclusion, possibly leading to a defect, in cast metal; Stringer (stairs), the structural member in a stairway that supports the treads and risers; Stringer (surfing), a thin piece of wood running from nose to tail of a ...

  8. Girder - Wikipedia

    en.wikipedia.org/wiki/Girder

    Ceiling of Hinkle Fieldhouse in Indianapolis, Indiana, is constructed of large trusses built of riveted girders. A girder (/ ˈ ɡ ɜːr d ər /) is a beam used in construction. [1] It is the main horizontal support of a structure which supports smaller beams.

  9. Bodyboarding - Wikipedia

    en.wikipedia.org/wiki/Bodyboarding

    Most boards on the market today contain one, two, or three rods (usually of carbon or graphite), referred to as stringers, to strengthen the board, reduce deformation, add stiffness and recoil to the core, thus providing greater speed off bottom turns and transitions on the wave.

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