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Clark manhole drain cover

Discussion in 'Building' started by ey143, 7 Oct 2021.

  1. ey143

    ey143

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    02C5EF9B-3B95-45CD-84A5-D9FB1C72DA07.jpeg I bought this Clark drain cover from wickes for my garage manhole. Seems quite soft when walking over it despite it saying it can take 650kg or whatever.
    I’m worried about eventually driving my car over it which is positioned where the wheel will be stationary on it.

    Are they generally ok abs quality?
     
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  3. CBW

    CBW

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    I think a car might weigh more than 650Kg, so I’d say it’s unsuitable. Ok for pedestrian traffic.
     
  4. ey143

    ey143

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    The whole car is not going to put its weight on one wheel. Whilst I don't know what the weight is on one wheel most tyres including mine say that the tyre can take 650kg.

    It just feels soft when walking over this drain. Curious to know what others experience when fitting manhole covers.
     
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  5. Old Salt

    Old Salt

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    I wouldn't park my car on it
     
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  6. Harry Bloomfield

    Harry Bloomfield

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    I have two pressed steel covers in my drive, just in front of my garage. I was wary at first, but they are fine. I wouldn't put a jack on them though to jack my car up on them.
     
  7. pcaouolte

    pcaouolte

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    Is it this one? https://www.wickes.co.uk/Clark-drain-5-Ton-Steel-Manhole-Cover+Frame---450-X-600mm/p/240730

    Although it is called a 5 Ton cover it says in the detailed description:
    • 5 Ton Gross Plated Weight Loading. Weight Rating Is Expressed As The Gross Weight Of The Vehicle With Tyres And Four Points Of Contact
    • Not Suitable For Anything Heavier Than Pedestrian Traffic. Will Support A Slow Moving Wheel Load Of 1.25 Tonnes
    So that's nice and clear!
     
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  8. John D v2.0

    John D v2.0

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    They are built to a cheap price rather than a quality, they do bounce a bit and probably don't work as well in real life as in theory. I had exactly the same situation with a similar cover, and i took the basic one back for a refund and ordered an ACO one online for double the price but double the quality, that one is specified by proper architects and bought by the pallet load.
    I Think ultimately it depends on how risky it is where it is and how worried you are.
     
  9. ey143

    ey143

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    Yes that is the one.

    John there is a risk that my car when parked in the garage, my left front tyre (therefore the heavier engine load bearing weight) will either slowly go over it or park on top of it as it's the correct position where my car will eventually come to a stationary stop.

    Not sure how I can argue for my money back given that it's been several months. Then again it's only £25 I lose rather than a damaged suspension.
     
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  11. Harry Bloomfield

    Harry Bloomfield

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    If it concerns you, put a piece of thick ply over it, or a suitable piece of scrap steel sheet - to spread the weight. 650Kg point load rating, is more than the load of most cars, even at the front.

    "Not Suitable For Anything Heavier Than Pedestrian Traffic. Will Support A Slow Moving Wheel Load Of 1.25 Tonnes"

    I would interpret that as only suitable for pedestrian traffic in public areas. It clearly says it is able to support a vehicular load of 1.25 tonnes, on one of its wheels, on top of the cover.

    As already said, I have two similar covers in my drive, just in front of my garage. I drive my large and very heavy car over them every time the car goes in or out of the garage. I take no special care to avoid parking on them.

    I must admit I was a little wary at first, but I needn't have been.
     
    Last edited: 9 Oct 2021
  12. pcaouolte

    pcaouolte

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    Clarke make several different drain covers that all look the same from above. There is a PC6AG which is Pedestrian only and weighs 5.5kg and a PC6BG which can take 5 tonne Gross Plated Weight and weighs 6.5kg (there are other heavier ones). wickes seem to have mixed together the specifications of more than one drain cover on their web site. Does your cover weigh 5.5kg or 6.5kg?
     
  13. ey143

    ey143

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    I honestly don't know and it's not mentioned anywhere and not easy to weigh unless I bring a pair of scales to the building site and Mr standing on it as I'm not living at the property yet.
     
  14. Dereekoo

    Dereekoo

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    It will bend and deform but it won't collapse, there will be something like a factor of 3 safety wise
     
  15. ey143

    ey143

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    Factor of 3?
     
  16. Bouy

    Bouy

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    Yes. with all the minimum stresses they allow for in the steel, an allowance for someone driving at speed over it giving static and dynamic forces I would well imagine loading it with 2 tonne wouldn't make it disappear down the manhole. Please do an on site test and report back.
     
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