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Case Studies
Click here to see a video of the system in operation
Case Study 1
Barrel Vault Roof
Superstore
Gutter Type = External Eaves
Roof Area = 12,000 m2
Height = 10 m
Gutter length = 2 x 200 m
Roof Area to drain per gutter = 6000 m2
Category of protection = 2
Storm Duration = 2 minutes
Design Rate = 30 years
Design RFI = 0.048 l/p/s/m2
Total l/s for roof = 576.0 l/p/s
Total l/s for gutters = 2 @ 288 l/p/s
Siphonic System
No. of inlets = 36 (primary & secondary)
Collection main diameter = 250 – 300mm
Downpipe diameter = 250 – 300mm
Underground diameter = 350 – 400mm
Projected Cost = £35k - £50k
Gravity Drainage
No. of Outlets = 22
Downpipe size = 225mm with sump box
Underground diameter = 350 – 400mm
Projected Cost = £8k - £12k
RainPulse
No. of Outlets = 12
Downpipe diameter = 110mm
Underground diameter = 160mm
Projected Cost = £5k
Case Study 2
Category 4 Building
Data Centre
London
Rain Pulse
Gutter Length: 2 x 40m
Building Width: 34m
Roof Area per Gutter: 920m²
Height to Gutter: 14m
Gutter Type: Boundary Wall
Outlet Type: 110mm Rain Pulse
Building Category: 4
Storm Duration: 2 Minutes
Design Life: Maximum Protection
Design Rain Fall Rate: 0.155 l/s per M²
Total l/s for Full Roof: 142.60 l/s
Rain Water Pipe dia: 110mm
Number of Rain Water Outlets & Downpipes = 6
Gravity Drainage
Gutter Length: 2 x 40m
Building Width: 34m
Roof Area per Gutter: 920m²
Height to Gutter: 14m
Gutter Type: Boundary Wall
Outlet Type: 225mm – 160mm Tapered
Building Category: 4
Storm Duration: 2 Minutes
Design Life: Maximum Protection
Design Rain Fall Rate: 0.155 l/s per M²
Total l/s for Full Roof: 142.60 l/s
Rain Water Pipe dia: 160mm
Number of Rain Water Outlets & Downpipes = 20
Saving 70%
Case Study 3
Multi-Pitch Building
Factory Units Bristol
Rain Pulse
Gutter Length: 3 x 60m
Building Width: 48m
Roof Area per Gutter: 2 x 720, 1 x 1440m²
Height to Gutter: 16m
Gutter Type: Boundary Wall/Valley
Outlet Type: 75mm/90mm RainPulse
Building Category: 2
Storm Duration: 2 Minutes
Design Life: 30 Years
Design Rain Fall Rate: 0.048 l/s per M²
Total l/s for Full Roof: 138.24 l/s
Rain Water Pipe dia: 75/90mm
Number of Rain Water Outlets & Downpipes = 9
Gravity Drainage
Gutter Length: 3 x 60m
Building Width: 48m
Roof Area per Gutter: 2 x 720, 1 x 1440m²
Height to Gutter: 16m
Gutter Type: Boundary Wall/Valley
Outlet Type: 160mm – 110mm Tapered
Building Category: 2
Storm Duration: 2 Minutes
Design Life: 30 Years
Design Rain Fall Rate: 0.048 l/s per M²
Total l/s for Full Roof: 138.24 l/s
Rain Water Pipe dia: 110mm
Number of Rain Water Outlets & Downpipes = 16
Saving 44%
High School
Birmingham
Rain Pulse
Gutter Length: 2 x 110, 30, 1 x 62, 51
Building Width: 24m, 10m, 20m, 47m
Roof Area per Gutter (m²): 1100, 992, 510, 2170, 420
Height to Gutter: 15m, 24m
Gutter Type: Boundary Wall
Outlet Type: 75mm, 90mm Rain Pulse
Building Category: 2
Storm Duration: 2 Minutes
Design Life: 30 Years Protection
Design Rain Fall Rate: 0.047 l/s per M²
Total l/s for Full Roof: 315.46 l/s
Rain Water Pipe dia: 75mm, 90mm
Number of Rain Water Outlets & Downpipes = 20
Gravity Drainage
Gutter Length: 2 x 110, 30, 1 x 62, 51
Building Width: 24m, 10m, 20m, 47m
Roof Area per Gutter (m²): 1100, 992, 510, 2170, 420
Height to Gutter: 15m, 24m
Gutter Type: Boundary Wall
Outlet Type: 160 – 110mm Tapered
Building Category: 2
Storm Duration: 2 Minutes
Design Life: 30 Years Protection
Design Rain Fall Rate: 0.047 l/s per M²
Total l/s for Full Roof: 315.46 l/s
Rain Water Pipe dia: 110mm
Number of Rain Water Outlets & Downpipes = 37
Saving 46%
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2 Young Place, Kelvin Industrial Estate, East Kilbride, Glasgow, G75 0TD
Tel:+44 (0) 1355 235561, Fax: +44 (0) 1355 247189, Email: sales@cglsystems.co.uk
(Registered in Scotland No 24587)