Ciria C577 ((hot)) Guide

Ronan Point was a wake-up call. CIRIA C577 is the answer. Whether you’re designing a car park, a hospital, or a mixed-use tower, this guide gives you the practical steps to prevent the unthinkable.

From this tragedy came modern robustness requirements. And in the UK, one document stands above the rest for practical guidance: .

With the rise of BIM and parametric design, CIRIA’s methodology is increasingly being automated. Some engineering firms now script notional removal checks into their analysis software. However, the —why a building is robust—still comes from the principles in C577. ciria c577

CIRIA C577: The Essential Guide to Structural Robustness for Builders and Engineers

❌ “Robustness means designing for a bomb blast.” ✅ No—it means preventing disproportionate collapse, which is usually achieved with simple tying. Ronan Point was a wake-up call

Published in 2005 (with updates and related guidance since), CIRIA C577 – Robustness of structures provides a comprehensive methodology for designing and assessing structural robustness. It bridges the gap between the high-level principles of Eurocodes (BS EN 1991-1-7) and real-world construction practice.

If you design buildings, manage risk, or construct multi-storey structures, understanding CIRIA C577 isn’t optional—it’s critical. From this tragedy came modern robustness requirements

❌ “My software does all this automatically.” ✅ No software can interpret tie forces and notional removal logic—engineering judgement is required.