The Grip-Tite Foundation Push Pier System is used to fix foundation settlement. The Push Pier System uses steel tubes that utilize the weight of the structure to hydraulically drive the piers to bedrock or other competent load bearing strata. The piers are spaced a maximum of 6 feet apart and are used to level or stabilized an existing foundation. Once the tubes are driven to bedrock or the competent load-bearing strata, the load of the structure is fully transferred to the pier through an underpinning bracket that is positioned under the footing. The structure is now stabilized to prevent any further settlement.
Products
Push Pier System
Our Push Pier tube are manufactured from high strength/low alloy hot rolled steel. Push Pier structural tubes are offered in 3″ diameter. Grip-Tite offers these tubes in two thicknesses; our Standard Duty is 0.12″ and our Heavy Duty is 0.188″
Standard Bracket
Heavy Duty Bracket
Flat Bracket
Extensions
Advantages
- End-bearing pier that does not rely on friction for capacity
- Each pier load tested during installation
- Ability to reach greater depths using a starter tube with friction collar
- High-strength steel pier sections and sleeved couplings have high resistance to bending
- Long life span, resistance to corrosion (design life in moderate soils more than 100 years)
- Available with hot-dipped galvanized coating for added corrosion resistance
Specifications
Pier Tube
- 3.0-inch Outside Diameter (O.D.) x 0.120-inch wall tube steel, ultimate tensile strength = 80,000 psi (min.), yield tensile strength = 70,000 psi (min.)
Tube Reinforcing Insert
- 2.75-inch O.D. x 0.120-inch wall tube steel, ultimate tensile strength = 80,000 psi (min.), yield tensile strength = 70,000 psi (min.)
Foundation Bracket
- Bracket Tube
3.875-inch O.D. x 3.125-inch Inside Diameter (I.D.) x 10-inch long DOM mechanical steel tubing conforming to ASTM 513 ? Type 5 / Grade 1026. Ultimate tensile strength = 100,000 psi (min.), yield tensile strength = 90,000 psi (min.) - Angle Bracket
0.5-inch thick flat plate conforming to ASTM A-36 hot rolled steel bent to form a 90 degree angle with equal sides of approximately 8 inches. Ultimate tensile strength = 58,000 psi (min.), yield tensile strength = 36,000 psi (min.) - Bracket Support Strap
0.375-inch thick x 3 inches wide x 21.25 inches flat bar conforming to ASTM A-36 hot rolled steel which is bent into a “horseshoe” shape around the bracket tube. Ultimate tensile strength = 58,000 psi (min.), yield tensile strength = 36,000 psi (min.) - Top Plate
0.75-inch thick x 5.5 inches wide x 9.5 inches long conforming to ASTM A-36 hot rolled steel. Ultimate tensile strength = 58,000 psi (min.), yield tensile strength = 36,000 psi (min.) - Cap Plate
1.0-inch thick x 4.0 inches wide x 8.5 inches long conforming to ASTM A-36 hot rolled steel. Ultimate tensile strength = 58,000 psi (min.), yield tensile strength = 36,000 psi (min.) - Weld
E71T1, minimum tensile strength = 71,000 psi ? peformed by AWS certified welder - Threaded Rod
0.75-inch diameter x 12 inches long ASTM A311 ? Class B / Grade 8 Zinc Plated. Ultimate tensile strength = 150,000 psi, yield tensile strength = 130,000 psi
Capacity
- Foundation Pier System, which includes pier tube, tube reinforcing insert and foundation bracket, tested by an Independent Laboratory to peak loads exceeding 70,000 pounds (70 kips).