3 Storey House Design in Koswatte, Battaramulla

The house was to be designed on a sloping land and the car porch has designed at the basement level separated by floor height retaining wall. The retaining wall was designed as a propped cantilever wall and hence the thicknesses could be maintained in an economical level. 
The structural design was done by Eng.Isuru S. Amarasena. 225mmx225mm columns and 300mmx300mm columns were used appropriately transfer the axial loads and also to withstand the induced bending moments in the vertical members. A the project was initiated during the crisis period, due to unavailability and the cost rise of the materials, two options were proposed for the retaining wall design. A rubble retaining wall and a propped cantilever one, so that the client could decide the appropriate wall type by considering the timely factors at the moment.

Almost all the slab panels could be designed with a 125mm thickness and with T10 reinforcement bars in 200mm centers. The design was carried out not using the thumb rules, but with a proper structural modelling and analyzing part. So that, we were able to provide the most suitable economical design. It means the larger sizes only for actually required positions and economical smaller sizes and reinforcement for the other places. This concept may have benefitted to the client in the cost perspectives. The project is still in the construction stage.