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 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
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?