How do you calculate the lifting capacity of building hoist?

The lifting capacity of a building hoist is calculated by considering several factors including the hoist's motor power, the strength of the hoist's construction materials, and the safety factor. The manufacturer usually provides the maximum lifting capacity based on these factors. To calculate it manually, you would need to know the motor's lifting force, the efficiency of the hoist's mechanical system, and apply a safety factor to ensure the hoist operates within safe limits. It's important to follow the manufacturer's guidelines and never exceed the specified lifting capacity to prevent accidents and ensure the hoist's longevity.