Although the topic is old, I would like to add some useful information on what are the right factors to look for when buying loading dock equipment.
Choosing the right leveler largely depends upon the important factors, such as maintenance, safety, reliability, ease of operation, manufacturer support, and your specific needs. I would suggest going through a detailed document on how to choose the best loading dock equipment at http://www.datarengineering.com/downloads/Rite%20Hite%20-%20Choosing%20a%20right%20Dock%20Leveler.pdf
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