A grating covering a drain can be a collection of iron bars ( the identical, elongated elements) held together ( to ensure the bars are parallel and regularly spaced) by a lighter iron frame.....
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Grating can also come in 4 feet ( 121.9 cm) or 2 feet ( 61 cm) x 8 feet ( 243.8 cm) panels which are often used for decks on bridges, footbridges and catwalks. Other panel sizes may also be available....
A grating is any regularly spaced collection of essentially identical, parallel, elongated elements. Gratings usually consist of a single set of elongated elements, but can consist of two sets, in....