Rainwater Downpipe Research

gutter/downpipe prepared by: ANIQ BIN ANAS / 2015198575 NOOR NASIHA BINTI RAZALI / 2015186951 NUR DEENA BINTI RUSLAN / 2015406636 NUR MUHAMMAD KAMIL BIN MOHD IZHARI / 2015168085 NUR SHAHAREENA BINTI NAZLI / 2015532297 PUTRI FARAWAHIDA BINTI MEGAT KAMARULZAMAN / 2015959337

Introduction Gutter, a narrow trough or duct which collects rainwater from the roof of a building and diverts it away from the structure, typically into a drain.

Downpipe is a pipe for carrying rainwater from a roof gutter to the ground or to a drain

1.

FUNCTION

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2.

SHAPE

5 WAYS TO DISCHARGE THE WATER i) Combined sewer ii) Surface water drain iii) Soakway iv) Water course v) Rainwater harvesting

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To restrict ground erosion To protect property foundation To provide a means of water harvesting To prevent water penetration into the building

MATERIAL Cast iron, asbestos cement, UPVC(PVCu), cast and extruded aluminium, wood, and bamboo.

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SIZE Based on calculation PVCu guttering - most commonly used in domestic installationSizes from 75mm to 150mm in diameter

5 ways to discharge 1.

3.

Water course Where the rainwater would be discharged directly into a stream or river.

Combined sewer Normal drainage systems that combine surface water and wastewater from a dwelling.

4.

Soakway Holes in the ground that allows the rainwater to soak away gradually

2.

Surface water drain Specialist drainage system designed for surface water only. The waste water from appliances are kept separate from the rainwater

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Rainwater harvesting Where the rainwater will be stored for reuse eg .watering garden or cleaning the car

gutter + downpipe components 1.

The roof drainage system for a building consists of four separate parts:

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Gutter or spouting Outlet, sump, rain-water head Downpipe Drain.

2. The process of calculating the required size of gutters and downspouts involves: ● ● ● ● ●

Obtaining rainfall intensity for the building location.

Determining the spacing and locations of downspouts.

Calculating design roof areas.

Sizing the downspouts.

Sizing the gutters.

Calculation Must be designed to cope with : - Amount of expected rainfall in that area - To calculate the size of gutter and downpipes - Downpipe must be at least the same size with the outlet

Calculation factors : i) Roof area ii) Rainfall intensity iii) Number and positioning of outlets iv) Width and length of the roof v) pitch of the roof

Example: Catchment area 8.0 × 30.0 m = 240.0 m², cross-section of gutter and downpipe 240 cm².

According to Table 15 you can choose a gutter of half-round shape, inner diameter 250 mm or following Table 16 a squared gutter, height 115 mm, width 190 mm.

01 : MITSUI OUTLET, SEPANG blablabla blablabla

source: blablabla

roof plan

details

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A parapet gutter at the base of a sloping roof and a parapet wall, outflowing to a downpipe

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A simpler parapet gutter.

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A valley gutter between two parallel roof surfaces.

02 : ESCAPE, PENANG

ESCAPE Adventureplay Theme Park ESCAPE is the fun destination with exciting rides and games hosted in a natural environment.

ESCAPE Theme Park enables urban folks jaded by life in the concrete jungle the opportunity to enjoy the natural environment.

ESCAPE re-introduces the play and values of yesteryear so to inject reality into a world overdependent on an isolation-inducing electronic lifestyle. Through fun activities, with an emphasis on self-directed and self-powered play, the visitor experiences Low Tech, High Fun.

nature inspired design If you explore the ESCAPE Theme Park, you’ll come across several instances where environment and nature-friendly designs were incorporated.

grass-lined roof top

The roof of the administrative buildings is grass.

Though the grass needs regular maintenance, it keeps the interior temperature down while allowing excess water to collect for recycling. This is channeled into a brass drum with a tap at the bottom.

rain-gutter water recycle

green roof Generally have five layers. A root barrier prevents roots from penetrating the building. A protection mat helps to minimize punctures. The drainage layer allows heavy rain to run off to a perimeter drain yet still retains moisture for dry periods. A filter sheet stops fine particles from clogging the drainage layer. The growing medium, typically an engineered material and not soil, provides nutrients for plants above.

variables Location Factors : 1.

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Regional & local climate Volume of rainfall Amount of sunlight Exposure - strength of wind

Vegetation : 1.

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Structure Factors : 1.

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Load capacity of roof Pitch of roof Shading & rain shadow from adjacent structures Hot/cold air emissions from air cond unit and other equipment Height of parapet walls Safe access to install & maintenance

Depth of substrate required by plants Drought tolerance of plants Shade tolerance of planting Other habitat creation & environmental issues

Other factors : 1.

2.

3.

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The height of green roof system build up Maximum saturated load of green roof Shear force the green roof will exert on pitched roof Safe access for maintenance

Intensive green roofs would ideally use root resistant bituminous membranes or hot melt structural waterproofing systems as the nature of the access levels and maintenance regimes require a robust solution to ensure that the building is protected correctly.

Intensive green roofs can be safely installed on horizontal decks, whereas with extensive green roofs minimum falls of 1:60 and above are preferred. The criteria is to have a depth of drainage layer deep enough to hold the landscape above any residual standing water that occurs on the surface of the deck, either by design or circumstance.

Source : BAUDER

Source : BAUDER

Layer of Green Roof Components

source: http://www.edgemeltsystems.com

details

thank you.