Helical Anchors

Our Winslow Geo Anchor (1993) and Geo Pile (2009) have been used to provide support to hundreds of structures (representing thousands of anchors and piles installed) as diverse as homes, buildings, towers, solar arrays, and pools.

The geo anchor and geo pile are comprised of single or multiple helix coils welded to an internal steel column that provides exceptionally high compression and tension capacity in unstable soils. Indeed, our 3.5" diameter anchor has been tested to support 50 tons consistently and, for a project in Nevada, a one-time documented company best of over 65 tons (read about it here), and our 8" diameter geo pile, an incredible 100 tons (!) in a project in Northern California (read about it here). In both cases, the high strength steel provides elastic foundation frame response to seismically-induced energy, translating into uniform dampening of structure.

Our geo anchors and geo piles are quick and easy to install -- a major benefit when compared to either drilled concrete piers or driven concrete piles. The state-of-the-art interconnected steel components (very environmentally friendly) adapt to any site/weather conditions, and can be installed up to one every ten minutes -- something that you definitely can't do with the drilled piers & driven piles systems. They prevent damage to adjacent structures, as the non impact installation diminishes costly litigation often caused by other piling systems. And, with no spoils or off-haul to deal with during installation, the savings in time is outdone only by the savings in cost.

In terms of manufacturing, advanced assembly and ASTM testing procedures assure quality and product reliability. In-field testing provides load and torque performance on each geo anchor/geo pile installed. This is something we've rarely, if ever, seen providers of drilled concrete piles and/or driven concrete piles do (and, here's a big question for anyone using those other systems: how do you know if they -- really -- ever attain bearing pressure if they're never tested? Hmmmmm . . . something every builder should ask their supplier).

Finally, everyone wants to know about the corrosive aspects of installing steel in the ground. In fact, and over the past 100 years steel anchors have been used, the industry has done mountains of study on this issue and produced volumes of information. In general, steel does not corrode a few feet under the ground, as there is no air to act as a corrosive agent. So, and most of the time, it's only the top few feet that are of concern. And, although every soil has various corrosive attributes, most can be solved by applying a protective layer to the steel, such as an epoxy coating, a galvanized coating, and in the absolute extreme cases, an electrical current.

In terms of our deep foundations, our standard practice for every installation is to design to the spec provided by a registered corrosion engineer (and, we have one of the world's best on our Advisory Board, Ms. Kerrie Howell). In addition, we have done extensive research and study re the corrosion issue, and published a White Paper on the subject, 'Corrosion of Helical Anchors in Soil' (click here to read it). You'll see the maximum expected loss of less than 2 mm of steel is 75 years. The length of time required to experience 3.2 mm (1/8 in.) metal loss is often defined as the service life; at this rate, the useful life of anchors could be expected to exceed 125 years.

For houses, buildings, towers, pools, and solar arrays, our geo anchors & geo piles provide an exceptionally strong, long-lasting, reliable load-bearing capacity -- and, at a significant cost saving when compared to either drilled concrete piers or driven concrete piles. And, when it's all said and done, isn't that what every builder wants from their foundation system?