Presentation on theme: "The Winslow Geo Anchor in Pool Foundations Delivering Superior Performance for Lower Cost when Compared to Drilled Concrete Piers 2013 - 2014."— Presentation transcript:
The Winslow Geo Anchor in Pool Foundations Delivering Superior Performance for Lower Cost when Compared to Drilled Concrete Piers
Best Base Confidential. All Rights Reserved. 2 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
Best Base Confidential. All Rights Reserved. 3 Why the Winslow Geo Anchor Todays 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 % less than drilled concrete piers. And, since steel has a much smaller C02 footprint than concrete, its a far greener solution too. Bottom line: were passionate about delivering this product.
Best Base Confidential. All Rights Reserved. 4 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 % less than drilled concrete piers. The production, transportation, and installation of steel anchors has a significantly smaller CO2 footprint than drilled concrete piers.
Used on Multi Levels
8 is not... Dual-helix flights on anchor
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
Best Base Confidential. All Rights Reserved. 20 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 AnchorConcrete Drilled Piers Materials: 18 anchors, 15 feet long, installed18 drilled piers, 15 feet, installed 3.5 O/D, 3/8 thick, Schedule 8016 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
Best Base Confidential. All Rights Reserved. 21 Cost Comparison (Page II) Additional Labor: None$2,500 Installation cycletime: 4.5 hoursThree (3) days Other costs: NoneSoil 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%)
Best Base Confidential. All Rights Reserved. 22 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.
Best Base Confidential. All Rights Reserved. 23 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:
Best Base Confidential. All Rights Reserved. 24 Contacts Tom Richards, Sales: Jim Winslow, Implementation: Rich Treanor, Planning/Production: Tom Bragg, Engineering Liaison: John Cook, S.E.: Greg Carr, P.E.: