Current through Register Vol. 55, No. 1, January 4, 2025
Section 25.81 - Chain and electric hoists(a)Construction. Chain and electric hoists shall be made of what is known as "all metal construction." No cast iron shall be used in parts subject to tension except drums, bearings or brake shoes.(b)Chains. The chains shall be made of the best quality steel, iron or aluminum with welded links.(c)Factor of safety. Chain and electric hoists shall have a factor of safety of at least five.(d)Braking devices. Chain and electric hoists shall be equipped with an approved device which will automatically lock the load when hoisting is stopped.(e)Limit stops. Electric hoists shall be provided with an approved limit stop to prevent the hoist block from travelling too far in case the operating handle is not released in time.