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Low Headroom Slab Transporter |
Product Summary |
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Parking Structure T Girder Replacement Vehicles |
Case at Hand
A 20 year old seven story prestressed concrete parking structure had sustained damage to double-tee stems in thirteen locations. The tee stems were damaged by leakage of road salts from the floors above, and were determined to be beyond repair. The challenge facing the owner was to find a way to remove and replace these elements while still using portions of the garage for parking. If this was not possible, the owner was facing options up to demolishing and replacing the structure at a cost approaching $10,000,000.00. Working closely with the General Contractor, Jones & Gardner Engineering was asked to design, build and operate equipment which would transport the damaged tees out of the building, transport replacement tees into the structure and set them into their final position. The use of machinery inside the structure was limited in several ways. Only seven feet of headroom was available. The engineer of record limited wheel loads on suspended slabs to 2,000 pounds per wheel. Replacement slab elements were 4 feet wide and 60 feet long. Movement of these elements through entrance areas and through the structure was difficult due to the extremely tight clearances. The machinery designed and built by Jones & Gardner Engineering did accomplish the desired objectives within the limits set by the engineer of record. The job was completed within budget and within the prescribed time schedule. Portions of the parking structure were open to the public throughout the project, relieving the owner of substantial financial loss and public relations problems. |