Rabobank Case Studies
Situation: In the early spring of 2007, Scott Kremke and Ram Jack of California
were contacted for a bid on the repairs needed on a Rabobank property
in Calexico, California. The bank building had a large crack across the
floor, and the windows and doors were misaligned. The bank owners were
concerned that the vault might become inoperable due to the building settling.
Working with Grenier Engineering of Phoenix, Arizona, Ram Jack of California
proposed a repair design consisting of 70 Ram Jack® Deep Driven Steel
Piers on the perimeter foundation of the structure and 30 Ram Jack®
Helical Piers on the interior slab.
Solution: Due to the condition of the structure and the extent of the repair and
remodeling plan, a complete relocation was required. Earlier attempts
at repairing the structure presented some challenges within the scope
of the project. One of the support beams for the roof system was placed
directly over the rear opening and was causing the header to fail and
had opened a large crack in the above wall. During the concrete removal
for the pier locations on the interior slab, the header and roof system
began to go into further failure. A design and repair of the failing header
and roof system was installed and a decision was made to remove the entire
interior floor system and use the 30 Ram Jack® Helical Piers as preconstruction
anchors. The loads created by the 3’ by 3’ footing system
and the 25’ masonry walls with the free span roof presented a challenge
for Ram Jack of California to perform the required lifting of the structure.
A Ram Jack® Manifold Lift System was purchased for this. The lift
system allows for a uniform lift to be made at several pier locations.
With an ultimate lift capacity of 50 kips per location, most residential
and commercial structures are within the design capacity of the system.
The Ram Jack® Deep Driven Steel Piers were driven to a final depth
of 60’ with an ultimate capacity of 60 Kips and the Ram Jack®
Helical Piers were driven to a final depth of 20’ with an ultimate
capacity of 40 Kips. With all of the piers installed, a lift was made
on the structure using the Ram Jack® Manifold Lift System. The final
elevation recovery was 3.5”, leveling the front of the structure
with the built-in concrete vault system. This corrected the misaligned
windows and doors and allowed for the new slab to be installed without
Conclusion: Ram Jack of California was able to provide Rabobank with all of the services
they required to get their property back in a safe, stable working condition.
The versatility and strength of the Ram Jack® Systems allows for most
residential and commercial applications to be completed with ease.
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