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  2. Shade sail - Wikipedia

    en.wikipedia.org/wiki/Shade_sail

    UV inhibitors are now added during the manufacture of shade cloth and good shade cloth now generally comes with a multi-year UV degradation warranties. Shade cloth is a knitted fabric and this is an important factor in using it to design and manufacture shade sails. Shade fabrics are measured by their shade factor, which is the measure of how ...

  3. Rail fastening system - Wikipedia

    en.wikipedia.org/wiki/Rail_fastening_system

    A rail fastening system is a means of fixing rails to railroad ties (North America) or sleepers (British Isles, Australasia, and Africa). The terms rail anchors , tie plates , chairs and track fasteners are used to refer to parts or all of a rail fastening system.

  4. Fastener - Wikipedia

    en.wikipedia.org/wiki/Fastener

    A fastener (US English) or fastening (UK English) [1] is a hardware device that mechanically joins or affixes two or more objects together. In general, fasteners are used to create non-permanent joints ; that is, joints that can be removed or dismantled without damaging the joining components. [ 2 ]

  5. Iron railing - Wikipedia

    en.wikipedia.org/wiki/Iron_railing

    During the summer of 1941, during World War II, the United States stopped exporting scrap metal to the UK. [7] [8] The government declared, in response, that all unnecessary metal, including railings and gates, was to be removed, melted down and utilised for the war effort. Many sets of iron railings in Britain were removed.

  6. Marston Mat - Wikipedia

    en.wikipedia.org/wiki/Marston_mat

    RAF aircrew with one of their Bristol Beaufighters on a PSP airstrip at Biferno, Italy, August 1944. Marston Mat, more properly called pierced (or perforated) steel planking (PSP), is standardized, perforated steel matting material developed by the United States at the Waterways Experiment Station shortly before World War II, primarily for the rapid construction of temporary runways and ...

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