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Architectural copper is generally used in sheet and strip. Strip is 60 cm (24 inches) or less in width, while sheet is over 60 cm (24 inches) in width, up to 120 cm (48 inches) in width by 240 or 300 cm (96 or 120 inches) in length, plus in coil form.
Standing seam metal roofs come in sheets up to or sometimes more than 30 feet (9.1 m) long and widths of 12, 14, 16 or 18 inches (300, 360, 410 or 460 mm). The standing seam is typically 1 + 1 ⁄ 2 or 1 + 3 ⁄ 4 inches (38 or 44 mm).
The progression of thicknesses is clear in column 3 (U.S. standard for sheet and plate iron and steel 64ths inch (delta)). The thicknesses vary first by 1 ⁄ 32 inch in higher thicknesses and then step down to increments of 1 ⁄ 64 inch, then 1 ⁄ 128 inch, with the final increments at decimal fractions of 1 ⁄ 64 inch.
Sheet resistance is a special case of resistivity for a uniform sheet thickness. Commonly, resistivity (also known as bulk resistivity, specific electrical resistivity, or volume resistivity) is in units of Ω·m, which is more completely stated in units of Ω·m 2 /m (Ω·area/length). When divided by the sheet thickness (m), the units are Ω ...
Perfboard is a material for prototyping electronic circuits. It is a thin, rigid sheet with holes pre-drilled at standard intervals across a grid, usually a square grid of 0.1 inches (2.54 mm) spacing. These holes are ringed by round or square copper pads, though bare boards are also available. Inexpensive perfboard may have pads on only one ...
slot-in panels (typically made from 1.0 mm thick copper sheet): max 350 mm wide for 1.0 mm, by nominal 4 m length. cassettes (typically made from 1.0 mm up to 1.5 mm thick copper sheet): largest-format cladding elements, more subframing is needed: can be 900 mm x nominal 4000 mm length.
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