Nine-Story Condo Secured Case Studies
Ram Jack Provides Stabilization to Walnut Street Condo Building
Larsen Landis, a structural engineering firm in Philadelphia, Pennsylvania,
ran into problems with the nine-story condo building, housing nine condos,
on Walnut Street. Soil boring determined the presence of fill material.
Ram Jack Tri-States was contacted to provide helical piles.
The Walnut Street project is a nine-story condo building originally designed
with concrete footings and steel columns. Fill material was determined
in the soil boring to a depth of 14 ft. There were column loads as high
as 1.8 million pounds.
Working with the engineers, Ram Jack suggested using 276 helical piles
to support the concrete structure. Working on the building in rotation
with other trades, the plan was for Ram Jack to drive 5 1⁄2 in.
and 3 1⁄2 in. helicals beneath the existing structure.
Over the course of four months, during seven mobilizations, Ram Jack worked
with other site contractors to install pile caps and grade beams to the
all-concrete structure. After site contractors removed the rear wall of
the existing structure and underpinned the existing stone walls, Ram Jack
was able to drive helical piles beneath the existing building. Engineers
relied on Ram Jack’s ability to custom-design installation plans
as well as custom-manufacture steel piles.
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