DTCE provided the structural design for a new three-storey mixed-use building, replacing an existing single-storey commercial structure. The development includes ground-floor commercial space with residential tenancies above, supported by a structural system comprising concrete floor slabs, reinforced block walls, steel portal frames, cross-bracing, and piled foundations.

A key design consideration was the constrained site, with the new building constructed directly between existing neighbouring structures. To control seismic movement and prevent structural interaction across the boundary, the building was designed with a stiff lateral system and carefully detailed seismic separations. The structural layout also includes steel beams supporting masonry walls where floor diaphragms could not provide adequate restraint, ensuring reliable load transfer throughout the building.

The main reinforced concrete staircase connecting the ground and first floors was designed to accommodate seismic movement of the building. The stair is fixed at the base and at the main floor landings, with a sliding joint introduced at the mid-height landing to allow controlled movement during seismic events. Seismic gaps on either side of the stair enable the structure to move transversely without transferring excessive loads to the stair, while gravity support remains fully maintained.