| ABSTRACT: | VISUAL INSPECTION AND MULTI-TECHNOLOGY ASSESSMENT METHOD FOR
ABNORMAL DISPLACEMENT OF HEAVY DUTY OVERHEAD CRANES
F. Lefebvre
X-per-x Inc., Montreal, Quebec, Canada
This assessment method is based on years of experience in overhead crane visual inspection and analysis.
The main concern of the technique is to identify and fix the lateral and diagonal displacement of cranes
originating from miscellaneous causes. This assessment method describe the steps to follow when a
displacement problem is observed on an overhead crane. The analysis includes runway visual inspection,
visual inspection of the runway substructures, visual analysis with cameras, monitoring of the runways
substructure and runways displacement with indicators and acquisition system. The method is working by
elimination to convergence toward the cause of the abnormal displacement. It includes a few techniques of
telemetry and traditional precision measurements. The method is in accordance with the CSA and ASME
standards and with the practices of the industry. On site anecdotes and experiences are presented in
conjunction with the applicable standards to provide quick tips to point out a massive amount of interrelated
problems.
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