How do you calculate the weight of an object that can be lifted by a lifting device safely?

To calculate the weight of an object that can be safely lifted by a lifting device, you must consider several factors. First, determine the lifting capacity of the device, which is the maximum weight it is designed to handle. This information is typically provided by the manufacturer. Next, account for the weight of any additional equipment, such as slings or cables, that will be used in the lift. Subtract this from the lifting capacity to find the maximum weight the object can be. Ensure all safety margins and regulations are observed, as these can affect the safe weight limit. Always err on the side of caution to prevent overloading the lifting device.