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Sangath. “As a place to be inhabited, as a place to facilitate the course of human interaction…”. Case Study. Ahemdabad. Hot and Arid 23.03°N 72.58°E. Average summer maximum is 41 °C and the average minimum is 27 °C. Cold northerly winds are responsible for a mild chill in January. - PowerPoint PPT Presentation
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SangathCase Study
“As a place to be inhabited, as a place to facilitate the course of human interaction…”
Hot and Arid23.03°N 72.58°E.Average summer maximum is 41 °C and the average minimum is 27 °C.Cold northerly winds are responsible for a mild chill in January.The average annual rainfall is about 800 millimetre.The highest temperature recorded is 48.5 °C.
Architect: B. V. DoshiLocation: Thaltej Road, Ahmedabad 380054Period of Construction: 1979-1981Project Engineer: B.S. Jethwa, Y. PatelSite area: 2346 m2Total Built-up Area: 585 m2Project Cost: Rs. 0.6 Million
Functional AreasReceptionInteraction SpacesDesign StudioWorkshopLibraryConference RoomAncillary Spaces
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General Description
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Sun Path Diagram
Hot and Arid23.03°N 72.58°E.Average summer maximum is 41 °C and the average minimum is 27 °C. The highest temperature recorded is 48.5 °C.
Annual Wind RoseThe annual average wind rose tends to indicate predominant wind direction as SW, followed by NW & NE.The pre-dominant wind speed is in the range of 0.5 to 2.0 m/s.Winter Wind Rose (Nov-Jan)Similarly, winter wind rose tends to indicate predominant wind direction as NE followed by NW.The pre-dominant wind speed is in the range of 0.5 to 2.0 m/s.Summer Wind Rose ( Feb- April)Moreover, summer wind rose tends to indicate predominant wind direction as SW followed by NW.The pre-dominant wind speed is in the range of 0.5 to 2.0 m/s.Monsoon Wind Rose (May-Aug)Monsoon wind rose tends to indicate majority of predominant wind direction as SW followed by NW.The pre-dominant wind speed is in the range of 2.0 to 3.0 m/s.Post Monsoon Wind Rose (Sept-Oct)Post monsoon average wind rose tends to indicate predominant wind direction as NW followed by NE, SW & SE.The pre-dominant wind speed is in the range of 0.5 to 2.0 m/s.
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Wind Rose Analysis
Annual Wind Rose
Winter Wind Rose
Summer Wind Rose
Monsoon Wind Rose
Post-Monsoon Wind Rose
AnalysisThe predominant wind directions change with regard to seasonal months. For example, winter month indicate NE, whereas, Feb to April shows NW, May to August SW. The months September and October appears to be peculiar months which shows W and NW respectively as predominant wind direction
Site Planning
Minimizing Solar Radiationon South and West Side
The structure is closely integrated with the outdoor spaces. Vegetation on site is almost always left to grow into wilderness. The west and south facade is shaded by dense trees.
Maximizing Wind FlowWind from West and South West side is taken in by juxtapositioning structures so as to create a central open space through which wind can flow unobstructed.
Rain Water HarvestingRainwater and Overflow of pumped water from the roof tank are harnessed through roof channels that run through a series of cascading tanks and water channels to finally culminate in a pond form which it is recycled back or used for irrigating vegetation.
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Site Strategy Analysis
“ combining certain enduring values of modern architecture with research into the substructure of Indian traditions”
The Structure
Vaulted Roof FormThe roof form creates an efficient surface/ volume ratio optimizing material quantities. Higher space volume --> provides for hot air pockets due to convective currents that keep lower volumes relatively cool.
Stack EffectVentilating window at upper volume releases the accumulated hot air through pressure difference.
InsulationBuilding is largely buried under ground to use earth masses for natural insulation.External walls of the building are nearly a meter deep but have been hollowed out as alcoves to provide storage that becomes an insulative wall with efficiency of space.
LightingIndirect LightingUpper Level Large Openings - Facing North.Skylights as projected masses from the roof. Small cut-outs on roof slab filled with hollow glass blocks.
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Site Strategy Analysis
A work of art stands on its own merits and Sangath possesses that indefinable quality of authenticity. Even local laborers and passing peasants like to come and sit next to it, enjoying the low mounds of the vaults or the waterjars overgrown with creepers.
The Structure
Construction TechniqueLocally made clay fuses over the concrete slab to form a non-conductive layer.The clay fuses entrap air. Known as sandwich vault.•3.5 cm thick RCC•8 cm ceramic fuses•3.5 cm thick RCC•6 cm thick water proofing•1 cm thick broken China mosaic finish
Finishes The concrete of slabs and wall surfaces are kept bare (unplastered) as final visual finishes which saves on finishing material quantity.China mosaic glazed tiles enhances insulation. Retard heart transmission as they are made up of clay.
Use of Waste MaterialPaving material is a stone chip waste while roof surface is glazed tiles waste. They have been carefully handcrafted and integrated into the design by fully using the waste products, which also promotes craftsmen and traditional heritage.
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Material and Construction Technology
“I think about the interior and exterior like a living organism. Like in a body, there should be nothing superfluous, there must be no compartments. All should come together to form a seamless whole,”
PERFORMANCEA temperature difference of about 8°CTime lag for heat transfer is nearly 6 hours30% to 50% reduction in cooling energyWaste material reuseWater Recycling10% saving in cost through lack of finishes.
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Performance Analysis
