Helical Piers vs. Pushed (Resistance) Piers
Helical piers and pushed piers (also called resistance piers or hydraulic push piers) are the two dominant technologies for residential and light commercial foundation repair. Both transfer building l...
Helical piers and pushed piers (also called resistance piers or hydraulic push piers) are the two dominant technologies for residential and light commercial foundation repair. Both transfer building loads from inadequate shallow foundations to deeper, more competent soil, but they use different installation methods and develop capacity through different mechanisms. Helical piers are screwed into the ground using hydraulic torque; pushed piers are hydraulically jacked into the ground using the building's weight as reaction. Understanding the differences helps homeowners and engineers choose the right solution for their specific situation.
Head-to-Head Comparison
| Criterion | Helical Piers | Pushed (Resistance) Piers |
|---|---|---|
| Installation Method | Rotated (screwed) into ground with torque motor | Hydraulically pushed using building weight as reaction |
| Capacity Verification | Torque-to-capacity correlation (real-time) | Hydraulic pressure during installation (building weight) |
| Minimum Building Weight | No minimum — works on any structure | Requires sufficient building weight for reaction |
| New Construction Use | Yes — widely used for new foundations | No — requires existing structure for reaction |
| Depth Capability | 10–100+ feet | 15–40 feet typical |
| Soil Conditions | Works in most soils; not rock | Works in most soils; not rock |
| Lifting Capability | Yes — with hydraulic jack on bracket | Yes — built into installation process |
| Typical Cost | $1,200–$3,500 per pier | $1,000–$2,500 per pier |
| Equipment Size | Mini excavator or skid steer | Portable hydraulic equipment (smaller) |
| Installation Time | 15–45 minutes per pier | 30–60 minutes per pier |
When to Use Helical Piers
When to Use Pushed (Resistance) Piers
Bottom Line
Helical piers are more versatile — they work for new construction and existing structures, in tension and compression, and at greater depths. Pushed piers are specifically designed for foundation repair of existing structures and can be slightly more economical when conditions are right. Many foundation repair contractors offer both and select based on site-specific conditions.