ANSI B30.6-1969 Safety Code for Derricks

An American National Standard. The American Society of Mechanical Engineers (ASME). Partial Revision of ANSI 830.2-1943. 29p. This Code applies to the construction, installation, inspection, maintenance, and operation of jacks; power-operated cranes; crane runways; power-operated and manually operated derricks and hoists; power-op~rated overhead hoists and their runways; and slings.