C577 [new]: Ciria

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

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. ciria c577

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. ❌ “My software does all this automatically

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. Whether you’re designing a car park, a hospital,

❌ “Only high-rise buildings need robustness checks.” ✅ Buildings as low as 4 storeys in consequence class CC2a still require robust detailing.