What factor should I use to take into account for impact loading, load acceleration, and the forces generated as the hoist brake stops the load?
A. Many factors influence the load imposed on a support structure such as the speed of the hoist, the weight of the load, the stiffness of the support structure and the distance from the load to the support. As a general rule of thumb, industrial crane manufactures use a design factor of 1.15 for impact loading. Due to the nature of the entertainment industry, CM recommends that a minimum factor of 1.25 be used and that a qualified individual makes an assessment of the situation. Qualified Person: A person who, by possession of a recognized degree or certificate of professional standing, or who, by extensive knowledge, training, and experience has successfully demonstrated the ability to solve or resolve problems relating to the subject matter and work. Q.
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