I. General

1. The remedial piers shall be installed by an approved foundation repair contractor. The piers shall have satisfied the requirements relating to the technical aspects of the products approved and ascribed by the installation techniques of the manufacturer
   unless otherwise noted within these specifications.
2. All work as described herein shall be performed in accordance with all applicable safety codes in effect at the time of installation.
3. The contractor shall employ a skilled, experienced work force who are familiar with the requirements and methods necessary for proper performance of the work as outlined in these specifications.
4. It is the responsibility of the contractor to determine the location of, and avoid contacting, underground utilities (gas, electricity, water, telephone, TV, etc).

II. Pier Locations

1. The contractor shall submit a written Plan of Repair prior to the beginning of work.
2. Plan of Repair shall include, but is not limited to the following:
   • Total number of piers required
   • Locations of the individual piers
   • Size and number of helices per screw pile (if applicable)
   • Minimum installed depth of the pier
   • Minimum final installation tension or torque of piles (if applicable)
3. If underground obstructions are encountered during installation, the contractor shall have the option of removing the obstruction if possible or relocating the piers.
4. Penetrations in the slab for pier placement shall follow the following:
   • i. No penetrations are to be made within a post-tension foundation within 6 inches of the nearest cable.
     • Mark all boundaries of the hole.
     • Saw cut the slab to a depth of one inch.
     • Use sledge hammer or jackhammers to breakout concrete; use points
       not chisels on jackhammers.

Type of Piers

• Helical (screw piles)
  • Per Manufacturers Guidelines and Specifications
• Cable Anchored, Sleeved, Steel Piling
  • Per Manufacturers Guidelines and Specifications
• Concrete Pressed Piling
  • i. Per Manufacturers Guidelines and Specifications
• Steel Pressed Piling
  • Per Manufacturers Guidelines and Specifications
• Concrete (poured-in-place)
  • Reinforced concrete piers with caps under the perimeter grade beams.
  • Piers should be a minimum of eight inches (8″) in diameter and should extend to a minimum depth of nine feet (9′) or to bedrock, whichever occurs first.
  • Concrete should be a minimum of five-sack mix (3000 psi).
  • iv. A minimum of three (3) – #3 reinforcing bars / ASTM-A615 – Grade 40 is required for each shaft. The reinforcing bars should extend to within 6 to 10 inches (6″-10″) of the bottom of the shaft.
  • After the piers and caps have cured for at least seven (7) days, mechanically raise the foundation to its original position or just and install solid concrete blocks between the caps/piers and fine level with steel shims.
  • vi. Excess fill dirt should be placed at the perimeter of the foundation where needed and sloped to drain away from the house.

Mud Jacking

• Pressure Injection of Sandy Loam and Portland cement

Installation Records

Written installation records shall be maintained for all remedial repairs. These records shall
include, but are not limited to the following:

• Project Name and/or Location
• Name of foreman or representative who witnessed the installation
• Date and Time of installation
• Overall depth of installed piers
• Any other applicable information relating to the installation