Sewer lines can be accessed through manholes for inspection or doing maintenance work. The manholes are covered with heavy lids that need to be opened prior to accessing the channels. Because of safety reasons, it is advisable that you use a manhole cover lifter system that does not require a lot of force to open the holes.
Mishandling of manhole covers could result to injuries because of the weight associated with the plates. The manual way of unseating the lids risks people from suffering injuries. Using your hands to open the manholes covers can cause serious back injuries and muscle strains. If you are using keylifters and pulling them with your hand, there is still a high risk of injuring yourself.
In addition, the dirt that has deposited in the gaps between the metallic covers and the frames makes them firmly stick together. The debris may cause corrosion, which further cements the covers and the frames. Lifting covers that have not been opened for a long time is quite difficult. In past, if the manholes where had tight fitting covers, people could thumb them with sledgehammer but this caused damages and broke the metallic covers.
Vehicles and people passing over the covers further make them tight. Debris and dirt also deposits on the gaps between the lid and frame making the two surfaces to hold firmly together. The covers may corrode and stick together with the frame making it difficult to unseat them. Often people use crude ways such as sledgehammers to thumb the plate covers and loosen them.
These are risky practices and could cause serious injuries. Even when the metal covers are loose, you may try to lift them manually with your hands. This can be dangerous attempt because it could cause serious back injuries and muscle strains. To prevent these injuries, you can use cover lifters that are designed with lifting keys.
Other unsafe tools used to open covers are such as pry bars, crowbars, and wedges. All these methods require much force to be applied to loosen and unseat the covers. You may have to use hammers to force these bars to open the lids. Even with loose fitting covers, if you lift them manually with your hand, you could suffer hand, feet or back injuries.
To avoid back injuries and muscle tension or strain, you can use the keylifters that are designed to fit into lid slots and lift the hole covers easily. You do not use a lot of force to open up the lids with the keylifter systems. Safety is important when accessing or opening manholes. Because of their heavy weight and likelihood of sticking together with the frames, they have to be lifted carefully.
If you use pry bars, you may find it difficult to lift the manhole covers especially when tar and other debris have filled the gaps. You cannot insert the pry bar easily. This poses a risk if you try to hit the bar with a hammer because it can slip off and fly high hitting you. This is why it is recommended that you use modern manhole cover lifter systems to unseat and open the lids.
Mishandling of manhole covers could result to injuries because of the weight associated with the plates. The manual way of unseating the lids risks people from suffering injuries. Using your hands to open the manholes covers can cause serious back injuries and muscle strains. If you are using keylifters and pulling them with your hand, there is still a high risk of injuring yourself.
In addition, the dirt that has deposited in the gaps between the metallic covers and the frames makes them firmly stick together. The debris may cause corrosion, which further cements the covers and the frames. Lifting covers that have not been opened for a long time is quite difficult. In past, if the manholes where had tight fitting covers, people could thumb them with sledgehammer but this caused damages and broke the metallic covers.
Vehicles and people passing over the covers further make them tight. Debris and dirt also deposits on the gaps between the lid and frame making the two surfaces to hold firmly together. The covers may corrode and stick together with the frame making it difficult to unseat them. Often people use crude ways such as sledgehammers to thumb the plate covers and loosen them.
These are risky practices and could cause serious injuries. Even when the metal covers are loose, you may try to lift them manually with your hands. This can be dangerous attempt because it could cause serious back injuries and muscle strains. To prevent these injuries, you can use cover lifters that are designed with lifting keys.
Other unsafe tools used to open covers are such as pry bars, crowbars, and wedges. All these methods require much force to be applied to loosen and unseat the covers. You may have to use hammers to force these bars to open the lids. Even with loose fitting covers, if you lift them manually with your hand, you could suffer hand, feet or back injuries.
To avoid back injuries and muscle tension or strain, you can use the keylifters that are designed to fit into lid slots and lift the hole covers easily. You do not use a lot of force to open up the lids with the keylifter systems. Safety is important when accessing or opening manholes. Because of their heavy weight and likelihood of sticking together with the frames, they have to be lifted carefully.
If you use pry bars, you may find it difficult to lift the manhole covers especially when tar and other debris have filled the gaps. You cannot insert the pry bar easily. This poses a risk if you try to hit the bar with a hammer because it can slip off and fly high hitting you. This is why it is recommended that you use modern manhole cover lifter systems to unseat and open the lids.
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