Save 7 to 28 days
No cure time
Structural Foundations are entirely prefabricated and can be installed and built upon the same day, regardless of the ambient and ground temperatures (including frost). Installation time ranges from mere minutes to one day per foundation, depending upon foundation size.
As set forth by the American Concrete Institute (ACI) Committee 301, minimum time for concrete curing corresponds to 70% of its specified compressive strength. In common practice, this usually is seven days’ cure time for small-volume concrete installations and 14 to 28 days’ cure time for large-volume installations. That’s seven or more days until concrete achieves sufficient strength to be built upon.
Structural Foundations accelerates the construction schedule, saving project costs, and yielding earlier use / revenue for project owners.
6-ton bearing foundation installed in under one hour and ready for immediate construction. Wind turbine installation in Jackson, Michigan.
Earlier project completion = Earlier use / revenue.
Installs in poor soils and rock
Few equipment needs
Well suited to both remote and urban areas
No disposal necessary for excavated materials
Geotechnical conditions pose little challenge to the installation of Structural Foundations. Structural Foundations consolidate and compact soils, improving their load bearing, and the method of installation accurately measures soils’ minimum bearing capacities. In contrast, traditional foundation systems are designed to utilize existing strengths of soils, and where soils are deficient, require uneconomical soils remediation in installation or larger safety factors in design. As well, inconsistencies in soil conditions across an installation site challenge the performance of traditional foundation design. Structural Foundations can be installed in soils where traditional concrete and / or pile systems are impractical or highly uneconomical.
Equipment requirements for installation aren’t intensive. Most sizes of Structural Foundations can be installed quickly and capably with a small crane and a compact hydraulic system. Structural Foundations can be equally valuable to projects in remote areas with rugged terrain as in densely populated cities where jobsite space is scarce. An added benefit of Structural Foundations is minimal excavation requirements, with all excavated materials returned to the foundation system during installation.
Install virtually anywhere.
Structural Foundations installation for a signal tower. Located atop Pea Ridge in the Appalachian Mountains, near Charleston, West Virginia.
Verified bearing capacity established before use
Settling and creep virtually eliminated
In installation, the bearing capacity of Structural Foundations is measured and verified. Impressive bearing capacities exceeding 300 tons (600 kips) per foundation have been achieved.
Structural Foundations are hydraulically installed. This supplies an accurately applied and known force throughout the installation, including foundation and soils in its zone of influence. The installing force is applied in either a stress or strain controlled manner as dictated by soil conditions. This process directly pre-stresses and pre-tests the strength of the surrounding soils and the system’s overall ability to meet and exceed the loads specified. Structural or geotechnical engineers supervise installations and complete records that verify installed loading.
The Structural Foundations system and method of installation consolidates or compacts soils and combinations of soils and rock. This is accomplished by any combination of (1) applied bearing forces that develop and / or utilize the soils’ bearing capacity, and (2) frictional forces that enact, develop, and / or utilize the passive lateral strengths of soils. This virtually eliminates settling and creep of the structure at loading equal to or less than the applied installing load.
Bearing capacity is indicated by the hydraulic system’s gauges and verified by an on-site engineer.
100+ year durability
Galvanized coating for corrosion resistance
30+ years of field performance data
Fabricated from high-strength structural steel and galvanized in accordance with ASTM A123 / A123M standards, Structural Foundations can achieve a maintenance-free lifetime of 100+ years. These are robust materials with known durability and properties, providing superior corrosion resistance both beneath and above ground. Galvanized coatings are ubiquitous on construction materials and hardware having steel substrates. With installations since 1986, not one Structural Foundations product has required maintenance.
Structural Foundations have been installed in high-moisture, high-erosion areas without any observed or measurable degradation in structural integrity. Our galvanized foundations have been installed for multiple riparian flood walls, where submersion in water is common.
Lifetime reliability and low costs.
Removable and Reusable
Can be removed and installed over and over again
Minimal infill of soils necessary
Portable, one-piece integral design
Desirable in jurisdictions requiring environmental restoration and reclamation
With minimal site disruption, installations of Structural Foundations can be removed and reused. Quick removal, often ranging from five minutes to under one hour depending upon size, is accomplished with a similar hydraulic process as in installation. Structural Foundations can be reused again and again as uses and locations change. One-piece integral design provides portability and ease in re-installation. Where removed, only minimal infilling of soils is necessary. Structural Foundations may be particularly attractive for installation in jurisdictions that regulate environmental restoration and reclamation. With Structural Foundations, you pay once for a foundation that could have many uses and installation locations.
Suited for permanent and temporary uses.
Ideal for sensitive environments
Minimal site disruption
Lower carbon footprint than concrete foundations
Sensitive environments, where site disruption and major excavation compromise fragile ecosystems, watersheds, and compliance with regulation, may especially benefit from Structural Foundations. Site disruption and deformation of ground cover is minimal.
The minimal heavy equipment needs for Structural Foundations installation reduces soil compaction and damage to vegetation. Installations can be accomplished within the immediate vicinity of buildings, trees, and utilities. Most overhead obstructions from vegetation do not require removal.
Made of steel, Structural Foundations have a smaller carbon footprint than concrete foundations designed for similar bearing capacity.
Galvanized foundation for a 120-foot tall road lighting tower in Charleston, West Virginia.
Removal of Structural Foundations begins with hydraulic lifting, performed in the reverse manner as in installation. For small foundations, a front-end loader can complete the lifting action to remove. For larger foundations, a crane is necessary.
Stewardship of natural resources.
Third-party validated performance
Withstood 100% of design loads
The National Wind Technology Center (NWTC), a department of the National Renewable Energy Laboratory (NREL), conducted a Cooperative Research and Development Agreement (CRADA) on our custom foundation installation for a 50kW wind turbine in Colorado. The CRADA was prepared by Dave Corbus and Jason Cotrell, and released May 17, 2004. It also evaluated the viability of our installation for large and small wind turbines. Significantly:
“[The] bearing foundation is unique among wind turbine foundations in that the foundation strength is proven during the installation process as the hydraulically applied installing load is the same as the uplift and bearing capacities. Another unique feature of the foundation is the ability to increase the natural bearing capacity of the soil, the installation test was designed to show the system’s ability to greatly increase this bearing capacity within the load bearing zone of influence.”
“The confined compressive strength of the soil was increased 3.4 times during installation of the foundation.”
“Further testing would not be required, as the bearing foundation system exceeded all of the design requirements. It is recommended that the bearing foundation system be considered for use in appropriate wind turbine applications.”