Steel Frame with 40m Roof Trusses, Secant Piled Retaining Wall & Driven Pile Foundations

This solution compares a structural steel frame with an RC alternative for a building on a hillside. The recommended steel scheme utilizes a 10m x 10m grid, 40m span roof trusses, and a composite metal deck slab.

Key challenges addressed include hillside excavation, high groundwater levels, and lateral stability for a secant piled retaining wall. Detailed calculations cover active/passive earth pressures, braced bay stability, roof truss member sizing (UC/SHS), and driven pile foundations, all designed to Eurocodes (BS EN 1990-1997).

Deliverables include schematic plans, sections, a comprehensive method statement, a construction programme, and a technical letter to the client regarding the structural implications of adding a deep basement.