Raise then extend the boom until the load is directly over the stack. Keep an eye on the boom angle and extension and the overload indicator. Stop the procedure immediately if the overload indicator operates. In this event, retract the boom first and then lower.Disclaimer. The legislative information contained on this web site is my interpretation of the law based on many years in the health and safety business. A definitive interpretation can only be given by the courts. I will therefore not be held responsible for any accident/incident/prosecution arising as a consequence of anyone using any information obtained from this web site.