3 Story house at Rathnayake Mawatha, Pelawatta.

An Elegant Architectural design by Chartered Architect Amila Ruwan Liyanapathirana for a calm and quite inside road at the busy premises of Pelawatta, Battaramulla. 

3 Floor housing unit has designed with maximizing the open spaces such as balconies and lobbies. The design has  atwo unit car parking area next to a ramping floor in order to maintain the level differences with the road. Living and dining are connected together with a larger area and also connected visually wth the swimming pool in the garden via glass facades. Two small storage rooms are provided for motor equipment storing and also for general purpose storing next to car park. In the ground floor Kitchen  is located next to dining together with the dirty kitchen in outside. Servant's room is also attached next to the dirty kitchen area. An outside toilet and a common toilet facility is provided in the ground floor. 

Remada Building at Kotikawatta (6 Story)

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This unique 5 Story building is designed in a very urbanized area of Kotikawaththa town. It is faced to Low level main road which goes from Colombo to Awissawella. Basement is designed for car parking areas and the Ground floor and first floor are designed for commercial purpose. Rest two floors are for accommodation purposes. 

The superstructure is designed on Pad foundations as the soil condition is good. All the foundations were tied in dpc level in order to build a robhust structure as it provides horizontal ties in the building in below levels. In one side small retaining wall part was needed to built as there was a level difference between the side road and the basement floor level. The lift pit was constructed by the reinforced concrete and the above lift walls were supposed to build by using the block work. Perimeter wall loads were taken in to load calculations and for interior walls partition boards were used in order to reduce the dead weights on beams. Actually it lead design in to an economical one. 

Structural Review of a Commercial Building near Biyagama Free Trade Zone

     This commercial building was proposed to design with 3 reinforced concrete slabs and structural design has not done earlier. The masons and the client together have planned the construction works and first floor slab was casted. The ground floor part and the first slab soffit was finished and they were about to start a food city type shop in the ground floor area. At that time they have noticed several cracks formed under several beams and they have propagated further.
    In that stage client requested to visit the site and he request a remedial measure advice for the issue. Chartered Engineer Isuru S. Amarasena visited the site and took the measurements of the cracks and observed the nature of the cracks. According to the available information amount and types and lengths of the reinforcement  used were noted down. 
    Then he did a structural analysis using a structural design & modelling software and came to know that the adequate reinforcement has provided to the sections (If only their information is correct). Then he believed that should be an issue with the construction material used or the construction method or quality controlling. However according to the available budget frame, further core tests or any quality checking test were avoided by the client. 
    Then he inquired about the further propagation of cracks and after a duration noticed that the propagation has stopped and cracks are still. So he recommended a repairing the cracks using a special non shrinkage grout. 
Below shown is a image of the structural modal used by the structural engineer for the analysis.

A 2 story House included with an adorable bridge in Awissawella, Sri Lanka.

    This awesome house is constructed in Avissawella, is a township in Sri Lanka, governed by an Urban Council, situated on the A4 route from Colombo to Ratnapura, Colombo District, Western Province, Sri Lanka, approximately 59 km east of capital Colombo. The awsome architectural design is done by the Chartered Architect: Jagath Jeewantha. Structural design was done by Chartered Structural Engineer, Isuru S. Amarasena. 
     Previously built old house was situated here and it was demolished and the debries were removed from the site initially. In ones side an embankment was there with a height of 6-8 feet. A reinforced concrete wall was proposed for that side with the appropriate waterproofing system. A small basement part was inside the design by utilizing the available ground levels. For that place a Retaining wall was proposed and designed with waterproofing as it was utilized as a room. 
    Although this house is a single unit, it was separated as 2 units and interconnected by an adorable bridge. Bridge was designed as a one-way spanning reinforced concrete slab. The foundations were connected with RC Tie beams on the rubble wall parts. But the client was so significant about the avoiding cross tie beams according  to the astrological advice. So the two foundation units were not interconnected by tie beams. But the slab itself connected the two units. As similar loading were available in the two units, differential settlement was not expected here. If a crack formed, it should have to be repaired after inspecting the termination of the settlements.

    All the foundations were Pad foundations and 4'x4', 3.5'x3.5' and 3'x3' sizes were used in different places. 9"x9" RC columns were used everywhere. Slab thicknesses were 5" except few places. T10 reinforcement bars in 9" spacing were used for the slab reinforcements. 
    This unique design is now about be completed and then it will become an amazing living space.

Shown below is a photo of the architectural modal done by the Architect.

Below shown is a photo of the structural Modal done by the Structural Engineer.

Below shown are the Axial forces on each column of the building taken during the structural design.

Below photo is taken during the construction of the first floor slab.

Columns are lifted as two concrete pours and connected with barraemulsion.

These are few from Structural Drawings.

Retaining wall for basement room with waterproofing.

This is how it looked like, before start constructions. The debris are from the previous house which was demolished just before the construction started. 

  

2 Story House in Wattala, Colombo.

   In this simple but beautiful housing project, the architectural design is done by the MUSE ARCHITECTURAL STUDIO by Architect: Chathura Perera. The structural design is by the Adorable Building Designs by Chartered Structural Engineer, Isuru S. Amarasena. The design was quite simple with a living area, dinning area, kitchen, a bathroom and a bed room with an attached bathroom in the Ground floor. The first floor is consisted with Family room, common toilet, one bed room and the master bed room with an attached bathroom. The walls around the living area are double height and it is visible to the family area on the first floor. Balconies are provided to all rooms and living and family areas to feel the surroundings and aroma around.