Ground Conditions Assessment
Evaluation of the ground surface to ensure it can support the crane's weight and outrigger/crawler loads during operation.
In Detail
A ground conditions assessment evaluates whether the ground where a crane will be set up can safely support the crane's total weight plus the lifted load. This includes checking soil bearing capacity, drainage conditions, underground utilities or voids, slope, and compaction. The assessment must be performed by a competent person before the crane is set up. Inadequate ground conditions are a leading cause of crane tip-overs. Proper documentation includes soil type, bearing capacity calculations, cribbing/matting used, and any geotechnical reports. Ground conditions must be monitored throughout operations, especially after rain.
Related Terms
Outrigger
Extendable beams with pads that stabilize mobile cranes by increasing the base of support during lifting operations.
Competent Person
A person capable of identifying existing and predictable crane hazards and authorized to take corrective measures.
Tip-Over
A catastrophic event where a crane loses stability and overturns, often caused by overloading, ground failure, or improper setup.
Lift Plan
A documented plan specifying the crane, rigging, load path, and safety procedures for a critical lift.