Wesley M. Bolden and Sons Structure Support

WESLEY M. BOLDEN & SONS

Serving Chicagoland Since 1943

FOUNDATION SUPPORT AND LIFTING
CONCRETE RAISING, SLAB JACKING

Porches, Garages, Sidewalks, Driveways, Homes, Buildings

Work guaranteed for 10 years. Fully insured.

Lifting a Structure With an Embedded Pier | Slabjacking | Get a Free Estimate | Contact




HOW A PIER SUPPORTS FAILING STRUCTURES



The porch pictured below on a Chicago west suburban home was put in after the foundation and rest of the house was constructed. It was supported by aggregate and a brick face. After 50 years, the aggregate eroded, and the porch began to fall over. Contractors estimated the cost of demolition, waste hauling, and construction of a new porch at $15,000.

Our inspection field engineer determined that the porch could be saved by a combination of slab jacking (pumping cement under the porch) and a single foundation-supporting pier.

Under the stress of the concrete movement, the original wrought iron railing fractured. A gap of about 5 inches was left between the bottom of the wrought iron railing and the porch.

 
 
STEP 1.

In preparation for installation of a 100% steel pier, a hole is manually dug next to the porch. This particular home had a water sprinkler system, one line of which ran alongside the porch. By digging by hand, the sprinkler pipe was able to be saved.

Bill, the foreman of one of the field teams, shows the water sprinkler pipe, which was preserved during the entire process. This prevented additional homeowner expense.

The hole is dug below the foundation of the porch. The additional depth is excavated for placing of the pier bracket (see below). Note the water sprinkler pipe remains intact.  
STEP 2.

The pier consists of sections of 3" steel schedule 80 pipe. They are drilled into the ground to provide a firm footing to bedrock.

The first section is attached to a drill bit, which is a 12" corkscrew or "helix."

 
(above) The three-man team (Bill, George (white shirt), and Brendon (left) guide the helix bit into the ground as it probes the ground below the hole. The helix bit is driven by the most powerful hand-held hydraulic available, the 4500 ft-lb torque machine built by the Estridge Corp.
   
STEP 3.

Once bedrock is reached, a 100% steel bracket, patented by the firm (above left of shovel), is slid down the connected pipes into the hole. It is rotated into place beneath the foundation. Two rods fit into the bracket, and a T-bar is attached above them.

A 4500 lb. hydraulic lift then pulls the bracket up until it is firmly seated against the building foundation. Once seated, it is bolted in place, completing the pier installation.

We then complete the job by replacing all dirt into the hole, cementing and caulking over the existing cracks in the structure, and hosing off the surrounding grass, sidewalks, and driveways.



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WHAT IS SLABJACKING?

Slabjacking is the insertion of concrete under a settling, sinking, or fragmenting surface to provide it support from underneath. The operation involves drilling a 3" hole into the existing concrete, and hydraulically pumping fresh concrete under the surface of that existing concrete. This provides a fresh layer of concrete, filling any voids that have been created by erosion or soil settling.

Slabjacking can be compared to erecting a large pillar underneath the concrete that is failing and is far cheaper than removing the old concrete, hauling it off, and rebuilding the driveway, sidewalk, garage floor, porch, or building.

Depending on the structure involved, slabjacking can be completed in an afternoon or morning.




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Contact Us for a Free Estimate

r Serving the Greater Chicagoland Area since 1943.

r Work guaranteed for 10 years.

r Fully insured. All employees covered by workman's compensation.

email Wesley M. Bolden and Sons for a Free Estimate



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