A plank is Timber
that is flat, elongated, and rectangular with parallel faces that are higher
and longer than wide. Used primarily in Carpentry, planks are critical in
the construction of Ships, Houses, Bridges, and many other
structures. Planks also serve as supports to
form Shelves and Tables.
Usually made from sawed timber,
planks are usually more than 1 1⁄2 in (38 mm) thick, and are
generally wider than 2 1⁄2 in (64 mm). In the United
States, planks can be any length and are generally a minimum of 2 in
(51 mm) deep by 8 in (200 mm) wide, but planks that are
2 in (51 mm) by 10 in (250 mm) and 2 in (51 mm)
by 12 in (300 mm) are more commonly stocked by lumber retailers.
Planks are often used as a work surface on elevated scaffolding, and need to be wide enough to provide strength
without breaking when walked on. The wood is categorized as a board if
its width is less than 2 1⁄2 in (64 mm), and its thickness
is less than 1 1⁄2 in (38 mm).
A plank used in a building as a
horizontal supporting member that runs between foundations, walls, or beams to
support a ceiling or floor is called a joist.
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