Archive for the ‘Pressed Concrete Pier or Piling’ Category

Should I use a Steel Pier or Pressed Concrete Piling to Repair my Foundation Problem?

Saturday, January 1st, 2011

Steel and pressed concrete pilings/piers are the most commonly use foundation underpinning repair methods in North Texas.

Except in areas of shallow rock, the goal with underpinning should always be to drive it deep enough into the earth so as not to be effected by seasonal changes in moisture. In North Texas that depth is generally recognized by engineers as around 12 feet.

Steel piers are the preferred method for most long term foundation repairs. Steel piers are driven in sections to either load bearing strata or rock.  Depths may be as great as 70 feet.

Pressed concrete pilings are a lower cost alternative to steel piers.   Concrete cylinders are driven to refusal in clay soil. Refusal in the Dallas Fort Worth area typically occurs at a depth of 8 to 15 feet, dependent upon soil moisture and weight of the foundation.   If the installer does not use water injection, depth may be somewhat more limited.

If you can afford the cost differential, always choose steel.    To learn more about the two systems, click here. You will find a very detailed comparison of the systems.

Straight steel pier driven deep to load bearing strata, typically rock.  Illustration courtesy Granite Foundation Repair

Straight steel pier driven deep to load bearing strata, typically rock. Illustration courtesy Granite Foundation Repair

Pressed concrete cylinders are driven to load bearing strata. Typically compressed clay. Illustration courtesy Granite Foundation Repair.

Pressed concrete cylinders are driven to load bearing strata. Typically compressed clay. Illustration courtesy Granite Foundation Repair.

Why are pressed concrete pilings or piers used for foundation repair?

Thursday, September 9th, 2010

Almost half of failed house foundations in the North Texas area have had foundation repair using pressed concrete pilings.

When properly installed, pressed concrete pilings provide good long term stability.  They are a practical, low cost alternative to steel piers.

Steel piers are often better than pressed concrete piers in the Dallas Ft Worth area, as they are consistently driven to rock.  Click here to read an article which compares the two foundation repair methods.

Here  are  4 reasons why pressed concrete piers are  offered by many foundation repair companies that do not offer steel piers for underpinning a foundation.

  1. The cost of steel pier installation equipment is 5 times the cost of pressed piling foundation repair equipment.  This means that the cost of getting into the repair business is much cheaper for companies that offer only pressed pilings.
  2. The cost of material for a typical steel pier underpinning is 3 times that of pressed concrete pilings.
  3. Most contractors do not have adequate facilities to manufacture steel pier brackets and cut high carbon tubular steel sections.
  4. Less scrupulous contractors can take short cuts with pressed concrete pilings, greatly reducing installation time and cost.

In areas where the distance to rock is over 100 feet, such as much of Houston, pressed concrete pilings are a good solution for foundation repair.  Pressed concrete pilings seldom go deeper than 10 to 15 feet in most of the Dallas Ft Worth Metroplex due to the high density of clay soil. Pressed steel piers go through clay like a hot knife through butter, to provide a consistently reliable foundation support system.

In dry conditions Granite Foundation Repair will water inject the soil.  Water injection provides maximum pressed concrete piling depth, which equates to best long term performance.