Resource from Article Digging Deep - Crawler becomes a deep-foundation work crane, by Rodney Garrett, Crane Works Magazine
6) The load must be properly rigged and attached, with the initial lift made slowly to verify that the load is rigged correctly and to ensure that the crane is stable.
7) The operator and qualified signal person must use standard hand signals. Contact may also be made via radio. If the operator loses communication with the signal person, operations must stop until communications are restored.
8) Pick-and-carry operations, typical of RT cranes, call for additional considerations. Operators should be aware of soft ground, ruts, rocks, and holes. Also must be aware of slope of ground and platform level before during and after lift.
9) While moving the crane, the operator must be aware of the changing environment, including overhead obstructions and other equipment or people that may have entered the working area.
10) Once the lifting work is completed, then lowering the boom; unpinning and re-pinning various crane elements; and stowing all elements for travel must be done in a safe manner.
Veteran crane operators with outstanding safety records keep their record distinguished by double-checking everything beofre they make a lift. Those operators pay careful attention at all times and will not tolerate horseplay or unsafe conditions. Crane safety must be No 1 on the crane operator's extensive checklist.