Whitby Wood Pritamdasani is the structural engineer for the high rise concrete frame project. The towers share a basement, a ground level lobby and retail zone, and a nine-level parking podium. The podium footprint extends beyond the towers, providing outdoor roof space for resident use.
The podium design is unusual in its non-standard, non-orthogonal shape with no movement joints. The lack of perpendicular walls combines complexity with structural stability, and required a complex construction sequence featuring left-out pour strips. The loads from three projected tower columns have been transferred using 1.8m reinforced concrete transfer structures in order to allow unimpeded vehicle circulation in the podium.
The towers each include two service floors and two unoccupied fire separation levels — a separation level is required in Mumbai high rise buildings for every 70m in height. The complex’s eco-deck is located on the podium roof, providing residents with a gym, a yoga room, a jogging track and a swimming pool, plus clubhouse.
A 2.5m deep raft foundation supports the towers, connected to the 900mm-deep spread footings of the podium by a 450mm-deep stich slab designed to resist ground water uplift and composed of lean mix concrete. Ground conditions include hard rock of not more than 130 tonne capacity.
Building services plant, water tanks and sewage treatment are located in the basement, along with some parking. The complex is served by five lifts plus a service lift and two fire escape stairways. Fire engine movement is allowed for on the ground level along the peripheries of the tower footprints.
LBS Road, Mulund West, Mumbai, India
RSP Design (Singapore)
Models : Whitby Wood Pritamdasani