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  2. Corrugated galvanised iron - Wikipedia

    en.wikipedia.org/wiki/Corrugated_galvanised_iron

    Corrugated galvanised iron (CGI) or steel, colloquially corrugated iron (near universal), wriggly tin (taken from UK military slang), pailing (in Caribbean English), corrugated sheet metal (in North America), zinc (in Cyprus and Nigeria) or custom orb / corro sheet (Australia), is a building material composed of sheets of hot-dip galvanised ...

  3. Square (tool) - Wikipedia

    en.wikipedia.org/wiki/Square_(tool)

    Framing square, or steel square, or carpenter's square, or roofing square Originally designed for timber framing, a framing square is made from a single flat piece of metal or polymer to a standardised design with a long, wide blade and at 90° to that a shorter, narrower tongue. It can also be used for measuring lengths and for calculating angles.

  4. Domestic roof construction - Wikipedia

    en.wikipedia.org/wiki/Domestic_roof_construction

    Section view through a house roof drawing showing names for parts of the structure. [clarification needed] (UK and Australia). Ctrs. means centers, a typical line to which carpenters layout framing. Domestic roof construction is the framing and roof covering which is found on most detached houses in cold and temperate climates. [1]

  5. Copper cladding - Wikipedia

    en.wikipedia.org/wiki/Copper_cladding

    Depending on metal prices, copper may be a very cost-effective cladding and roofing material. With good building design, materials choice and craftsmanship , copper roofing or facade cladding may be cheaper than slates or concrete tiles, especially when one takes into account the lasting colour , durability, maintenance -free and lightweight ...

  6. Metal roof - Wikipedia

    en.wikipedia.org/wiki/Metal_roof

    Standing seam metal roof. A metal roof is a roofing system featuring metal pieces or tiles exhibiting corrosion resistance, impermeability to water, and long life. It is a component of the building envelope. The metal pieces may be a covering on a structural, non-waterproof roof, or they could be self-supporting sheets.

  7. Purlin - Wikipedia

    en.wikipedia.org/wiki/Purlin

    Roll-formed metal roof purlins, also called roof battens. They are cropped to the angle of the purlin top cuts and can be lapped for joining. Metal purlins or roof battens screwed to roof gang-nail-type trusses

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  9. Rule based DFM analysis for deep drawing - Wikipedia

    en.wikipedia.org/wiki/Rule_based_DFM_analysis...

    The higher the drawing ratio, the more extreme the amount of deep drawing. Due to the geometry, forces, metal flow and material properties of the work, there is a limit to the amount of deep drawing that can be performed on a sheet metal blank in a single operation. The drawing ratio is roughly calculated as, DR = Db/Dp.