It would have been a tough job under the best of circumstances: rig 17 huge Chester-Jensen ice storage units for lifting 32 floors up the south face of the new Ohio Bureau of Worker's Compensation building in Columbus...direct the transfer of the units between derricks at the top of the building...then, after the units had been lowered 19 floors down the north face, drift each boxcar-sized unit off the hook and onto the 13th floor using a system of chain falls to affect an unusual and difficult sideways transfer.
But all that was just the beginning. For at 67,300 pounds each, nine of the units were within 7700 pounds of the maximum lifting weight (not including rigging) of the roof-mounted construction derricks specified for use in the installation. And at 11 1/2 feet high with minimal structural stability, all of the units would require custom rigging and careful handling to clear the sides of the building during transfer across the roof.
Atlas engineers, working from the manufacturer's requirement that the tanks be suspended from four top and four bottom lift points, devised a system using turnbuckles and cables that distributed the weight equally between the eight points. Then, drawing on over 50 years' experience, Atlas designed and fabricated a 4-way spreader system and lifting beams which were both lightweight enough to fit within the maximum lift limits and compact enough to provide the required clearance.
When all the easy questions have been answered and success still hangs in the balance, it's good to know you have Atlas experience on your side. Call Atlas the next time you need answers to your toughest industrial contracting questions.