The Winslow Geo Anchor in Pool Foundations Delivering Superior Performance for Lower Cost when

Compared to Drilled Concrete Piers

2013 - 2014

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Upfront

The Winslow Geo Anchor: A rotary installed steel anchor, with single or multiple helix flights, providing extremely high compression & tension capacity. Supports heavy loads, eliminates concrete, and reduces soils work.– Why the Winslow Geo Anchor– How it delivers superior performance for less money– Drawings and details of anchors in a pool foundation– Photo Sequence of anchors in a pool foundation– Cost study of anchors vs. drilled concrete piers in a pool project– Corrosion protection

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Why the Winslow Geo Anchor

• Today’s engineers and contractors place tremendous value on performance, cost, and environmentally friendly technology, and want to provide each of those elements to their customers.

• Thousands of Winslow Geo Anchors have been installed in foundations during the past 20 years without one structural failure or callback -- including five major pool projects in the past two years.

• In addition to an unparalleled record of performance, it often costs 15- 20% less than drilled concrete piers. And, since steel has a much smaller C02 footprint than concrete, it’s a far ‘greener’ solution too.

Bottom line: we’re passionate about delivering this product.

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How the Winslow Geo Anchor delivers superior performance for less money and is ‘green’

• Each anchor is custom fabricated to exact project specs by certified welders using a-grade materials at a controlled facility.

• Installed anchors are tested to ensure load capacity – a check not done with drilled concrete piers.

• Installs in minutes vs. days, in any weather, and produces no spoils/off-haul. Cost per ft. is often 15- 20% less than drilled concrete piers.

• The production, transportation, and installation of steel anchors has a significantly smaller CO2 footprint than drilled concrete piers.

It is

Used on Multi Levels

8

is not...Dual-helix flights on anchor

Setup

Setup

11

Slab Pour

Finish

Cut to length

Top plate attached

15

Note: Plumbing already up

16

Waffleboxes left out for point loads

Cables in Clips

Strong enough to walk on

orkiHawaii

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Cost Comparison (Page I)The following is a summary of costs where 18 Winslow Geo Anchors were used instead of 18 drilled

concrete piers in the foundation of a large pool built in the hills of Orinda, California:

Winslow Geo Anchor Concrete Drilled PiersMaterials:

• 18 anchors, 15 feet long, installed 18 drilled piers, 15 feet, installed

• 3.5” O/D, 3/8” thick, Schedule 80 16” diameter, caissons

• $53.32 per sf, $799 per anchor $62.40 per sf, $936 per pier

Total: $14,382 $16,848

Engineering:

• $4,000 structure $4,000 structure

• $4,900 geotechnical $3,500 geotechnical

Total: $8,900 $7,500

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Cost Comparison (Page II)

Additional Labor:

• None $2,500

Installation cycletime:• 4.5 hours Three (3) days

Other costs:

• None Soil off haul: $800

Grand totals pages I & II

• $23,282 for Winslow Geo Anchors $27,648 for Drilled Concrete Piers

Final cost analysis: Winslow Geo Anchors were $4,366 less (16.8%)

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Additional Benefits

The Winslow Geo Anchor also provided benefits in:

• Ease of construction: Anchors were ‘done’ when installed (avg. eight minutes per), vs. 3 days for piers (drill, 1.5 days, off haul spoils, .5 days, set caissons/pour, 1 day).

• Logistics: An array of trucks required for drilled piers vs. one tractor for anchors (no mixers or pump trucks – and accompanying neighborhood congestion – required).

• Safety issues: Amplified with the drilled piers solution (18 holes 16” diameter x 15’ deep introduces dangerous environment for humans and/or animals).

• Documentation: Each anchor installed is observed by a geotechnical engineer to ensure torque and depth requirements – checks not done with drilled piers.

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Corrosion Protection

• Every Winslow Geo Anchor is coated based upon project specific soil conditions (Resistivity, pH, Sulfates, Chlorides), and appropriate corrosion protection applied (epoxy, galvanization, cathodic).

• Consultation provided by Carrie Howell, recognized leader in corrosion engineering in construction industry.

• Technical paper: “Corrosion of Helical Anchors in Soils” (2008, Dr. Tom Bragg, Director, Special Projects, Best Base Foundation Systems. Available at: www.thebestbase.com).

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Contacts

• www.thebestbase.com

• Tom Richards, Sales: 925.683.2739

• Jim Winslow, Implementation: 925.352.2456

• Rich Treanor, Planning/Production: 925.640.8680

• Tom Bragg, Engineering Liaison: 925.915.0808

• John Cook, S.E.: 707.578.8185

• Greg Carr, P.E.: 925.336.6366