Community Centre Foundations – Update April 2015

Spiti Projects has taken particular care with all their buildings, bearing in mind the importance of a stable structure in this seismic zone.

The foundation needs to be sturdy, the sub soil needs to be stable and the foundation should have a ring beam. The primary construction technique employed in the community centre is the vernacular Spiti rammed earth technique. A number of measures have been taken to further improve the resistance of the structure in case of seismic events.

In terms of geometry, buttresses were added to all the long spanning walls, external wall junctions and corners to give lateral stability. In terms of reinforcement, two strategies were implemented:

  1. The traditional technique of providing 1 meter long horizontal wooden reinforcement in all the critical junctions of rammed earth wall was adopted and improved upon by combing it with the buttress system. They create a woven structure at every 20cm in height.
  2. The building has a number of composite steel reinforced beams for additional horizontal reinforcement to ensure that the building is tied at levels of critical discontinuity. The most critical one of them is the foundation ring beam, tying the building footing providing a strong and sturdy base. Above this there are ring beams at plinth level, sill level, lintel level and roof level.

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