green roof study 1. how does it work? a “pan form” for t-beam slab construction

Green Roof Study

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How Does it Work?

A “Pan Form” for T-Beam Slab Construction

Achieves Design Objectives

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• Safely carries expected loads• Maintains building shape and structural integrity• 40% lower mass reduces accelerated loads• Long span capacity

© 2013 Quad-Lock Building Systems, Ltd

25'-0" Single Span: 11" QD + 2.5" Slab @ 50 psf LL

Concrete needed   18.4 cu.yd

Top Reinforcement 6x6 WWM 288 LB

Bottom Reinforcement 2-#6 @ 24" O.C. 2883 LB

Quad-Deck Z-Strips Spaced @ 12" O.C. 900 LB

4071 LB

25'-0" Single Span: 8" Concrete Slab @ 50 psf LL

Concrete needed   37 cu.yd

Top Reinforcement #4 @12" O.C. E/W 1872 LB

Bottom Reinforcement #6 @12" O.C. E/W 4209 LB

6081LB

Compare Concrete Slab vs. ICF T-Beam

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150,000 lbs

75,610 lbs

Quad-Lock Green RoofBritish Columbia Institute of Technology Centre for Architectural Ecology

Roof Evaluation Module

Check it out at www.greenroof.bcit.ca

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Roof Evaluation Module

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R-10 Insulated Slab

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ICF Walls & Roof

(Both R22)

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Plantings

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Heat Flux Monitors

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Storm Water Collection

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The Results:

• Wet Season• Dry Season• Annual Average

• 45 % better retention• 94 % better retention• 69 % better retention

Storm Water Retentionby

Green Roof Layer

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69% Less impact on municipal water collection systems

Flow delayed to “off-peak” times

Lower impact fees charged at permitting

The Results:

• Heat Loss– Heat leaving the building

• Heat Gain– Heat entering the building

• 50 % (winter)

• 77 % (summer)

• 98 % (winter)

• 100 % (summer)

Reduction In Heat Flow Through Roof Structure

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ReferenceRoof

ICFGreen Roof

The Results:

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ReferenceRoof

ICFGreen Roof

24 Hr Heat FluxJuly 26, 2009

The Results:

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Integrated ICF Building Shell

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