OBJECTIVE

OVERVIEWYorkHoist was contacted by Arnold Electric Inc. (AEI) during their search for a qualified Material Handling provider to complete the initial Load Test Certification on a crane they sold to the U.S. Army Corps of Engineers. The crane manufacture KoneCranes, and all local material handling providers asserted that a load test could not be completed due to structural limitation of the dam gate house and lack of workable space.

Complete Initial Load Test Certification on a 35 Ton bridge crane installed at Wister Damin Oklahoma.

Arnold Electric Inc./U.S. Army Corps of EngineersCUSTOMER

Load TestingJOB TYPE

“35 Ton Bridge Crane Load Test at Wister Dam successfully completed. Five crane companies, including the manufacturer told us that it couldn't be done. We found one company that didn't hesitate to say 'we can do it'. YorkHoist whose corporate office is in Emigsville, Pennsylvania.”

- James Ryals, President – Arnold Electric Inc.

CHALLENGES

Load traversing bridge

No Water Weights: The U.S. Army Corps of Engineers requirements dictated that the test be completed with solid certified weights. The use of Water Bag Weights was prohibited.

Dam Gatehouse Size: The U.S. Army Corps of Engineers requirements dictated that the crane traverses the runway and hoist traverse the bridge while under the load of the test weights. The overall size limitation of the gatehouse required YorkHoist to engineer and fabricate a custom low headroom load bar to secure the test weights.

Access Bridge Capacity Limits: The access bridge to the Wister Dam Gatehouse has a maximum load capacity of 30,000 lbs. To complete the load test, YorkHoist was required to transport 77,000 lbs of weights across the bridge. YorkHoist used a small truck to individually transport weights ranging between 5,500 lbs and 12,700 lbs across the bridge to the gatehouse.

Gatehouse Floor Capacity Limits: The Wister Dam Gatehouse had a maximum floor capacity of 40,000 lbs. Because of this, YorkHoist could not simply place the entire test load on the floor. YorkHoist engineered and fabricated a load supporting framework which distributed the load across two and the dams load baring concrete columns. This allowed YorkHoist to assemble and disassemble the test load one weight at a time.

Placing load on framework

Moving framework into facility

OVERHEAD MATERIAL HANDLING | FLOOR MATERIAL HANDLING | PROTECTORS & SAFETY EQUIPMENT | MATERIAL STORAGE