Manholes are used to provide access to utility infrastructure. Manholes have heavy iron or steel covers intended to prevent entry and be strong enough to withstand heavy traffic over them. Removing a cover safely requires the right tools and preparation.
- Skill level:
- Moderate
Instructions
Things you need
- Traffic cones
- Reflective construction vest
- Traffic directing signs or flags
- Gas detector
- Manhole hook
- Magnetic manhole remover
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1
If a manhole is located in a road, sidewalk or any other area with vehicle or pedestrian traffic, secure the area by putting up traffic cones or barrels. For a manhole on a busy road, place another person in a reflective construction vest to direct traffic.
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2
Clear the area of debris that may interfere with safe removal. Leaves, trash and large sticks should be cleared away to provide access to the manhole.
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3
Prior to removing cover, use a gas detector along the edge of manhole to test for dangerous gases and oxygen levels. If levels are not right, then the area is not safe to enter.
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4
If the manhole cover has holes in it, you can use a manhole hook to pry it off. Insert the hook into the hole and pull the cover up and drag it away from the manhole.
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5
If the manhole cover doesn't have holes in it, use a manhole cover lifter. These devices use magnets to lift manholes. Follow instructions of the particular device and place the manhole on the ground while working inside the hole.
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6
Test the manhole again for proper oxygen and gas levels. If levels are not safe, do not enter and let the area ventilate. Special ventilation equipment may be necessary to increase oxygen or decrease dangerous gas levels.
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7
Install barriers around the manhole to prevent unauthorized entry or accidental falls down the shaft and put safety equipment for workers up before entering.
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8
When the manhole cover is removed, the manhole is secured and gas levels are safe, then you may enter the manhole.
Securing the area
Tips and warnings
- Use safety equipment like work boots and work gloves to protect yourself.
- Manhole cover removal should only be done if you are trained and authorized to remove manholes. Improper removal can lead to danger and arrest.
