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  2. Manhole cover - Wikipedia

    en.wikipedia.org/wiki/Manhole_cover

    By contrast, the heaviest class F900 manhole cover can withstand a maximum weight of 90 tons, making it suitable for docks, airports, and other extreme heavy-duty applications. [31] EN 124 does not apply for gratings of prefabricated drainage channels (according to EN 1433) or floor and roof gullies in buildings (specified in EN 1253-1). [30]

  3. Grating - Wikipedia

    en.wikipedia.org/wiki/Grating

    A grating can be defined by six parameters: Spatial frequency is the number of cycles occupying a particular distance (e.g. 10 line pairs per millimeter). The period of the grating is the inverse of the spatial frequency, measured in distance (e.g. 0.1 mm). Duty Cycle is the relative thickness of high and low lines. The duty cycle is the ratio ...

  4. Slot drain - Wikipedia

    en.wikipedia.org/wiki/Slot_drain

    Slot drain can be cleaned by moving along a cleaning paddle to move the sediment into a catch basin. Heavy Load Class. If the grates are not suitable for heavy loads, [3] the drains could quickly deteriorate, accidents could happen when traveling across the area with a forklift, vehicle, pallet truck, cart or pedestrians. The grates increase ...

  5. Trench drain - Wikipedia

    en.wikipedia.org/wiki/Trench_drain

    Employing a solid cover or grating that is flush with the surrounding surface, this drain is commonly made of concrete in-situ and with the option of using polymer- or metal-based liners or a channel former to aid in channel crafting and slope formation. The drain is characterized by its long length and narrow width, the cross-section of the ...

  6. Drain (plumbing) - Wikipedia

    en.wikipedia.org/wiki/Drain_(plumbing)

    A drain cover is a cover with holes (e.g. a manhole) or a grating used to cover a drain, to prevent unwanted entry of foreign objects, or injury to people or animals. It allows drainage of liquids but prevents entry from large solid objects, and thus acts as a coarse filter. A sink drain cover is a drain cover used to cover the sink drain.

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