Multi-Storey Office Conversion with RC Moment Frame and Steel Braced Frame Schemes

This solution details the renovation of a damaged 10-storey building into office space. It presents two distinct structural schemes: an unbraced RC moment frame with two-way slabs and a steel frame utilizing diagonal cross-bracing and composite Bondeck slabs.

Key challenges addressed include achieving a 2.8m clear height, avoiding additional internal columns, and managing lateral stability via diaphragm action and external feature bracing. Technical content includes load run-downs, double-reinforced RC beam design for 20m spans, and preliminary sizing for steel plate girders. Deliverables comprise functional framing plans, vertical and lateral load path diagrams, and foundation adequacy justifications based on existing capacity.