Part 2 Lifting the Load
Updated: Dec 15, 2020
In order to get the maximum lifetime out of a hoist, you want to be sure that you are using it correctly. Using the hoist for projects out of the hoist group classification for which it was designed changes the lifetime of the product. Before hoisting a load, be sure to determine a safe and effective path for it to travel to ensure that the load will not collide against objects or people. Also, check that no servicemen or unauthorized persons are on the crane and that the rails and power cables are clear of obstructing objects. Before hoisting, check that the hoisting devices are securely positioned on the bearing surface of the hook and that the safety catch on the hook is closed.
Next, you want to ensure that the load’s mass center is on the center line of the hook forging so that the load does not bend the hook neck. Make sure that the force is applied only to the hook’s bearing surface (the lowest point of the hook) because if force is applied to other parts of the hook it will cause undesired stresses. Forces on ramshorn hooks have to be equal on both bearing surfaces. Before hoisting, check that the load is balanced and safely fastened at the lifting points and also be sure that the load cannot slide, slip or detach itself when suspended.
In addition, you need to confirm that the ropes are perpendicular and that the hoist is positioned perpendicularly above the load to be lifted. A load must not be hoisted or dragged along the ground in a way that causes side pull on the roping unless the hoist is designed and manufactured for this purpose. When using a lifting accessory (sling, belt, etc.), always follow the instructions provided by the lifting accessory manufacturer. Finally, if two cranes are needed to handle a load, a balancing beam must be used to equalize the loading. Combined hoisting with two cranes must be supervised by a foreman knowledgeable about cranes or by a crane specialist who is in charge of the lifting operation.