Overhanging Multi-Storey Structure: Steel Frame vs. RC Core with Piled Foundations & Tension Ties

This solution compares a steel frame with tension diagonals against an RC scheme featuring extended cores with cast-in ties and hangers to support overhanging compartments. It addresses critical constraints including minimal external structure for panoramic views and poor coastal reclamation soil requiring piles to rock level.

Technical design includes Eurocode wind loading, RC slab and beam design (ULS/SLS), Macalloy tie tension checks, and pile foundation capacity. The paper provides detailed calculations for shear core stability and torsional restraint.

Deliverables include schematic plans, elevations, connection details, a detailed method statement for top-down construction, and a construction programme.