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The Wafflemat™ Foundation Forming System On-grade Mat Foundation for Expansive, Collapsible and Rocky Soils.

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Presentation on theme: "The Wafflemat™ Foundation Forming System On-grade Mat Foundation for Expansive, Collapsible and Rocky Soils."— Presentation transcript:

1 The Wafflemat™ Foundation Forming System On-grade Mat Foundation for Expansive, Collapsible and Rocky Soils

2 Best Base Confidential. All Rights Reserved. 2 Upfront The Wafflemat Foundation-Forming System – What it is – and isn’t – Features – Typical installation steps – ‘How To’ – Photo Sequences – Technical resources – Contacts

3 Best Base Confidential. All Rights Reserved. 3 Description What it is – Elevated post-tension slab (4” to 6”) poured monolithically over either 8.5” or 12” high, 19” x 19” foundation forms (‘Waffleboxes’), which provide void space for movement of soils – A series of ribs, 3’8” on center, are created by inter-connecting the foundation forms What it’s not – Slab resting entirely on grade, made entirely of concrete, without a place for movement of soils – Dirt-formed rib system requiring significant trenching and construction

4 It is

5 5 is not...

6 Best Base Confidential. All Rights Reserved. 6 Section View Top View Cross Section

7 Best Base Confidential. All Rights Reserved. 7 Features Design: – Use on expansive, collapsible, and rocky soils. Performance: - Voids resist swelling from over-watering, surface drainage, and flooding. Ribbed footprint means less contact with soil, yet extremely stiff slab. Prefect placement of cables equals minimum sag/additional strength. Acts as built-in vapor barrier. Implementation: – No presoaking pads, no trenching for concrete beams, no footings, no earth spoils and off- haul. Less depth of trenching for plumbing laterals beneath foundation forms. Quick -- and, fool proof -- set up/installation. References: -Millions of sf residential & light commercial space installed since 1995 in most difficult soil conditions in US and Mexico without one structural callback/failure. One More: Made of “green” (re-cycled polypropylene plastic) materials

8 Best Base Confidential. All Rights Reserved. 8 Typical Installation Cycle Day 1: Form boards set, plumbing installed, inspection Day 2: On-grade mat foundation forms (‘Waffleboxes’) spread and clipped/connected – Two sizes of void boxes; 8.5” uses plastic clips, 12” metal clips – Place tendons/anchor bolts – Set interior form; i.e., garage firewall / porch – Inspection Day 3: Slab poured – Strong enough for crew to walk on

9 Best Base Confidential. All Rights Reserved. 9 ‘How To’ Estimate number of Wafflebox foundation forms in footprint -Take total sf of footprint, divide by Example: 1500 sf / 4.15 = 361 Waffleboxes needed Calculate number installed per man hour -Detailed survey of last 15 projects; most 175 per man hour, least 28 per man hour, average 75 per man hour Determine yards of concrete in a Wafflemat slab -28 sf per cubic yard using 8.5” Wafflebox w/ 5” slab -Example: 1500 sf / 28 = 54 yards

10 Setup

11

12 12 Groups of two/four Waffleboxes clipped & connected

13 Slab Pour

14 Finish

15 5,000 sf house in Hawaii

16 16 Note: Plumbing already up

17 17 Waffleboxes left out for point loads

18 Cables in Clips

19 Strong enough to walk on

20 Working in Hawaii

21 Waffleboxes ‘lock’ when concrete poured

22 Used on Multi Levels

23 Finished House

24 Best Base Confidential. All Rights Reserved. 24 Technical Resources Wikipedia: Grade_Mat_Foundation_for_Expansive_Soils Grade_Mat_Foundation_for_Expansive_Soil Google: ‘On-grade mat foundations’ Best Base Website → ‘Technical Papers’ – Wafflemat Slabs Provide Superior Performance – Lowering the Carbon Footprint When Using the Wafflemat System for Concrete Slab Foundations – Wafflemat System Design Considerations – Wafflemat FAQ – Thermo Mechanical Analysis of Wafflemat Samples – Wafflemat and the IBC

25 Best Base Confidential. All Rights Reserved. 25 Contacts Tom Richards, Jim Winslow, Implementation: Rich Treanor, Planning/Production: Tom Bragg, Engineering Liaison: John Cook, S.E.: Dan Rhoades, G.E.: Greg Carr, P.E.:


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