The Dangers of Side Pulling in Crane and Hoist Operations

January 6, 2020

Setting up something that needed to be lifted by cranes and hoists on your building must be done in a safely manner. Crane and hoist operations are essential so that specific material is lifted to places that cannot be lifted through the use of stairs or elevators. If this specific operation is not done carefully, chances are that this lifting action can cause catastrophic incidents to the involved site.

Normal Overhead Hoists Operations

Cranes and hoists are meant to perform overhead a building or structure. When lifting heavy-duty materials, the load involved must be directly situated under the hoist in a centred manner. The only time the load can be situated anywhere near the centre is when experts have determined that the hoist and other components won’t be affected once the lifting action starts. 

What happens if the load is not centred when lifted? When the load is not centred when lifted, then side pulling occurs. Side pulling can also occur when a crane operator attempts to use the bridge or trolley drives to apply force to move an object horizontally. With this type of side pulling, the load is not fully suspended on the hoist and is free of any type of support. 

Side pulling is dangerous and deadly. With side pulling, the contractor is committing a serious violation of regulations and numerous industry standards.

Effects of Side Pulling

Side pulling can affect numerous factors within the crane and hoist operations. Once the load is lifted free of the floor or any support, it will attempt to centre itself under the hoist. This attempt can cause rapid swinging of the load in a horizontal arc like a pendulum. The pendulum effect of the load can cause injury to the people on-site or damage to the equipment and property in the area.

Another effect of side pulling is that the wire rope or load chain can be forced out of the grooving on the hoist drum or lift wheel. The wire rope or load chain is then damaged, causing further damage to drums, sheaves, and other components of the crane and hoist. If you are lucky enough, the chain will just break right away, leading to downtime and expensive repairs. However, if luck is not on your side, the load can be dropped while mid-air, putting equipment, facilities, and your people at danger.

The trolley hoist will also tip if the lift is not in line with the length of the bridge or monorail. This tipping action makes the trolley inoperable. Trolley hoist in this situation can be pulled off of the beam, making it dangerous to the load and collide with other people or structure. 

The lifting, when done in a location beyond the end of a bridge ream or monorail, can also be dangerous to the structure and people around the area. Once the lift is initiated, the trolley hoist can fall off the end of the beam, risking people’s lives below the hoist. Fortunately, there are ways to prevent side pulling. For one, the load must be centred under the hoist before lifting it. Moreover, your crane and monorail systems must be installed and operated by professionals. If you are looking for lifting experts, then consider us at Adz Lift Crane Hire. We prioritise the safety of all the people and structure whenever we perform lifting operations.