4-Storey Hybrid RC Flat Slab & Steel Truss Structure with Large-Span Lecture Theatre

This solution details a 4-storey hybrid structure featuring an RC flat slab system and two-way solid slabs for main floors, integrated with a large-span steel truss system for the plant room roof. The design addresses the critical challenge of a column-free 21m x 12m lecture theatre and high plant room loading.

Key engineering tasks include lateral stability via RC shear walls around cores, diaphragm action design, and foundation selection using isolated piled pads for clay-over-rock conditions. Calculations cover slab thicknesses (addressing punching and deflection), beam sizing, and comprehensive column load rundown (dead and imposed) for sizing internal RC columns. Deliverables include schematic plans, sections, and structural sizing logic.