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Why do Ambulances have Chains underneath them?

  1. J.S.Matthew profile image83
    J.S.Matthewposted 6 years ago

    Why do Ambulances have Chains underneath them?

    Every time I see an Ambulance drive by me I hear and see chains clinking and clanking underneath the vehicle. Why do they do this? Is it to warn animals ahead or some other reason?


  2. duffsmom profile image60
    duffsmomposted 6 years ago

    Bear with me for a minute as we go into left field for just a second.  Grocery carts at our grocery store have small chains hanging down from the bottom of the cart to the floor.  I always wondered why until I heard the manager telling someone that it grounds the cart to avoid a static electricity shock.

    Could the same hold true of the ambulance?

  3. Specialist5 profile image68
    Specialist5posted 6 years ago

    All the school buses in CT and many pieces of heavy equipment I see have chains as well.  I've never asked this of anyone but have always wondered myself.  I figured it had something do with grounding and electricity.  Now it's been confirmed.

    So why don't all vehicles have chains?  What's different about cars, etc. that they don't need them or aren't required to have them?

  4. bloggerjones profile image75
    bloggerjonesposted 6 years ago

    When I worked as a Paramedic in Colorado, we used a product from a company called "Onspot" for winter driving.  The idea was that there was a hydraulic swing-arm above each tire with a number of short chains connected.  When the system was put into use, the arm would lower and rotate, effectively swinging the chains under the tires as the vehicle made its way down the road.

    All that to say, when the system was not being used for winter driving, there were just chains hanging below the ambulance.

    Along the same lines, many trucks, etc. store their "tire chains" under the vehicle.

  5. JamesGrantSmith profile image59
    JamesGrantSmithposted 4 years ago

    In the UK Ambulances do not have chains.

    1. J.S.Matthew profile image83
      J.S.Matthewposted 4 years agoin reply to this

      That's very interesting JamesGrantSmith. Thanks for sharing your information.


  6. Jon A Webb profile image59
    Jon A Webbposted 3 years ago

    The automatic tire chains answer is correct, at least for ambulances. If you look at the chains they are not actually dragging on the road, so they would not work to ground the ambulance. And in any case, the idea of static electricity somehow building up and affecting systems INSIDE the ambulance doesn't make sense, first because the interior of the ambulance would have the same charge, and second because of Coulomb's law.
    Also, look at the diagram here: http://www.carguydad.com/wp-content/gal … spot-2.jpg -- the chains you see under ambulances look exactly the same. They are there for traction, not static discharge.

  7. ryan-cd profile image69
    ryan-cdposted 14 months ago

    Interesting question, in my country Ambulances don't have chains, so it may be something for traction if you are in a country like Canada that snows allot?

  8. profile image59
    MindMatters2posted 12 months ago

    The chains that are usually located in front of rear axle or rear end, is for wintery roads, school buses usually have them as well. It makes sense for icy roads. To cause heat to the ground for solid tread contact. For safe driving.

  9. LauraTallo profile image80
    LauraTalloposted 8 months ago

    My father has to have a special device dragging under his vehicle to keep electrons from making his heart defibrillator from going off.

  10. WheelScene profile image90
    WheelSceneposted 7 months ago

    Interesting, these are not chains for winter driving on the tires? They may be suspension related, to raise and lower the vehicle, sometimes you will see chains on Handicap Accessible vehicles.