The installation depth is a primary driver of the total cost per helical pier because the relationship between depth and expense is directly proportional. As the depth increases, the cost rises due to several specific factors:
- Material Costs: Deeper installations require more raw materials, specifically additional steel for extension shafts to reach stable, load-bearing soil.
- Labor and Equipment: Reaching greater depths increases the time the installation crew spends on each pier. It also requires more hourly equipment runtime and may necessitate larger, more powerful hydraulic drive heads to handle increased torque.
- Incremental Pricing: For every extra foot of drilling beyond the baseline plan, costs can increase by an estimated $30–$50 per foot for each pier.
- Engineering Requirements: Installations exceeding 20 feet often require a more robust engineering assessment to verify capacity, which adds to the upfront project expenses.
Because soil conditions vary—even between neighboring lots—the depth required to reach competent bearing strata is unpredictable, making a professional site inspection essential for an accurate budget.
Related FAQs
-
What is the Relationship between Installation Torque and Soil Bearing Capacity?
Read More »: What is the Relationship between Installation Torque and Soil Bearing Capacity?The relationship between installation torque and soil bearing capacity is governed by an empirical correlation that allows us to estimate the ultimate load-bearing strength of a pier based on the rotational force required to install it. This is expressed through…
-
How is the Soil Bearing Capacity Determined for Helical Pier Installation?
Read More »: How is the Soil Bearing Capacity Determined for Helical Pier Installation?To determine soil bearing capacity for helical pier installation, we use a multi-layered approach that combines theoretical engineering, real-time field measurements, and specialized testing. Our process ensures that structural loads are transferred past weak surface soils—such as the expansive clay…
-
Why is a Geotechnical Investigation Necessary to Verify Soil Bearing Capacity?
Read More »: Why is a Geotechnical Investigation Necessary to Verify Soil Bearing Capacity?A geotechnical investigation is essential because it provides the foundational data required to design a safe and reliable helical pier system. Soil properties vary significantly, and understanding the specific conditions at your site—such as soil stratigraphy, groundwater levels, and the…
-
What are the Best Stabilization Methods for 100-year-old Foundations?
Read More »: What are the Best Stabilization Methods for 100-year-old Foundations?Stabilizing a 100-year-old foundation requires a specialized approach that balances modern engineering with the preservation of historic materials. We utilize several proven methods to address the unique challenges of aging masonry and expansive soil conditions. Because every historic property is…
-
Can Helical Piers be Used for Historic Building Restoration?
Read More »: Can Helical Piers be Used for Historic Building Restoration?Yes, helical pier stabilization is an ideal solution for historic foundation restoration. Unlike traditional excavation methods, helical piers—also known as screw piles—are screwed into stable load-bearing soil deep beneath the active movement zone with minimal vibration and disruption to the…
