WOODEN PLANKS
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). 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. The plank was the basis of maritime transport: wood floats on water, and abundant forests meant wooden logs could be easily obtained and processed, making planks the primary material in ship building. However, since the 20th century, wood has largely been supplanted in ship construction by iron and steel, to decrease cost and improve durability.
WOODEN BATTEN
A batten is most commonly a strip of solid material,
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Roofing battens or battening, also called roofing lath, are used to provide the fixing point for roofing materials such as shingles or tiles. The spacing of the battens on the trusses or rafters depend on the type of roofing material and are applied horizontally like purlins.
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Wall battens like roofing battens are used to fix siding materials such as tile or shingles. Rainscreen construction uses battens (furring) as part of a system which allows walls to dry out more quickly than normal.
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Board-and-batten siding is an exterior treatment of vertical boards with battens covering the seams. Board-and-batten roofing is a type of board roof with battens covering the gaps between boards on a roof as the roofing material. Board-and-batten is also a synonym for single-wall construction, a method of building with vertical, structural boards, the seams sometimes covered with battens.
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Battens may be used as spacers, sometimes called furring, to raise the surface of a material. In flooring the sometimes large battens support the finish flooring[3] in a similar manner to a joist but with the batten resting on a solid sub-floor as a floating floor and sometimes cushioned.
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Battens are used for solid wall insulation. Regularly spaced battens are fitted to the wall, the spaces between them filled with insulation, and plasterboard or drywall screwed to the battens. This method is no longer the most popular, as rigid insulation sheets give better insulation (with battens bridging the insulation) and take less time to fit.
