Advance Lifts (St. Charles, IL) has the most standard units of multistage scissors lifts (MSLs & BFLs) in the industry, and also builds custom design units frequently. The company recently built a unit (pictured) for a customer with a platform of 7' X 13', travel of 23' and a 12,000-lb. capacity.
Advance Lifts can cover applications with big lifts, including tall travel lifts.
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