Crane operation, slewing, travel, load placement and environmental/weather limitations
Safe operation
Operate the crane smoothly, avoiding sudden starts and stops. Before slewing, ensure the area is clear and the load is secure. When travelling with a load (if permitted), keep the load low and use a spotter. Place loads on stable ground, not on personnel or fragile surfaces. Use the load chart for travel configurations. Never leave the crane unattended with a suspended load.
Environmental limitations
Wind is a major factor: know the manufacturer's maximum wind speed for operation and for erection. If wind exceeds the limit, stop. Also consider visibility, lightning, and rain. In hot weather, check hydraulic temperatures. Cold weather may affect lubricants and steel brittleness.
Traps in questions
A trap is assuming you can travel with a load on any crane; many self-erecting cranes are not designed for travel with loads. Another trap is ignoring wind gusts; use an anemometer. Also, slewing too fast can cause the load to swing out.
Worked example / rule of thumb
Rule: If wind speed reaches the manufacturer's limit (e.g., 20 m/s for operation), stop and secure the crane. Example: When placing a load, lower slowly and use a tag line; do not drag the load.