Whether you build your own or acquire a commercial template, mastering the CIRIA C660 Excel spreadsheet is now a non‑negotiable skill for any geoenvironmental engineer or contaminated land specialist.
Local Authorities, the Environment Agency (EA), Natural Resources Wales (NRW), and SEPA all expect to see evidence that you followed the CIRIA C660 methodology. A clear, well‑referenced Excel spreadsheet is often viewed as than a hand‑calculated table.
The report covers various aspects of sewer design and construction, including: ciria c660 excel spreadsheet
: Determines the minimum area of reinforcement required to control crack widths to specific limits (e.g.,
The spreadsheet is organized into several sections, including: Whether you build your own or acquire a
: Aligns designs with Eurocode 2 requirements for serviceability limit states.
C660 has not been superseded as of 2025, but CIRIA is working on a replacement (C801 – ground gas guidance update). When that arrives, your spreadsheet logic will need a major overhaul. The report covers various aspects of sewer design
Quick Tip: Managing Early-Age Thermal Cracks with CIRIA Spreadsheets
: Assists in selecting the right concrete mix and insulation strategy to minimize thermal stress. 📝 Important Note
: Helps avoid costly repairs by identifying high-risk pours before they happen on-site.