Manhole covers can be heavy, difficult to handle, and sometimes tricky or dangerous to open without the right tools or techniques. Different techniques may also be required depending on the cover features. For example, a cover may lie in its frame and easily lift up when pried. Other covers may be bolted down and require tools to unbolt or unlock the cover in order to lift it.
Generally, when opening any cover, keep in mind the following general guidelines:
- Wear Gloves: To help protect from sharp edges or rough surfaces.
- Clear the Area: Clear any debris or obstacles around the manhole to ensure you have a stable and safe working space.
- Loosen the Cover: Gently tap around the edges of the cover with a hammer or sledgehammer. This can help break any seal caused by dirt, corrosion, or debris.
- Remove Bolts or Security Hardware When Applicable: Depending on the security hardware, use appropriate tools such as a socket wrench to remove the hardware securing the cover closed.
- Pry Open the Cover: Use a hammer with a long handle and straight claw or a heavy-duty flathead screwdriver to pry open and lift the cover.
- Where to Stand: Stand opposite the keyhole or lifting point. This provides better leverage and reduces the risk of pinching your fingers.
- Lift Vertically: Once you’ve inserted your tool, lift the cover vertically to avoid binding.
- Lifting Technique: To avoid injury, lift with your legs, not your back. Engage your core muscles for added support.
- Watch Your Hands: Always watch where your hands and fingers are positioned to avoid being smashed if the cover shifts unexpectedly.
Do You Need A Tool?
Smaller manhole covers can be opened with your finger. However, when your manhole cover is large and heavy, you should use a lifting tool. Let’s take a look at the different lifting tools that can make opening your manhole cover significantly easier and safer.
Manhole Hook or Key:
A traditional and commonly used tool for opening manhole covers is a manhole hook. Also known as a key, tong, or cover-lifter, these specialized tools are designed to provide leverage to lift heavy covers safely. These keys come in different shapes and sizes, so it’s crucial to use the right one for the specific manhole cover you’re working with.
How do you use it? A manhole hook typically features a long handle with a curved, pointed hook on the end. You would insert the hook into the slot or notch at the edge of the manhole cover and use the leverage of the long handle to lift the cover. Once the cover is slightly raised, you can grip it more securely and remove it completely from the manhole.
Manhole Lifting Chains:
Manhole lifting chains, also called winches, are often used when the manhole cover is particularly large or heavy. They provide extra pull force, reduce the physical effort required, and are fast and efficient when multiple covers need to be opened quickly.
How does it work? The lifting chain is attached to the edges of the manhole cover using hooks or other securing mechanisms. Then, the chain is connected to a winch, which may be manual or powered by hydraulics or electric systems. As the winch turns, it pulls the chain and lifts the cover from the manhole.
Choosing A Method That Works Best For You!
Opening a manhole doesn’t have to be difficult if you use the right tools and follow the tips above. If you have questions or need further information on how to open a manhole, please contact Manhole Covers Direct.