Specification Intent

A step-by-step guide to writing a compliant fire door schedule entry in NBS format: EN classification, smoke, frame, hardware, gap fill, DoP and ETA — with a worked example.

Integrity, insulation, smoke, acoustic, thermal, security — a steel fire door carries several performance ratings at once. What each one measures and how to read them together.

An EN 13501-2 classification is shorthand for a tested, verified performance — but the shorthand only helps if you can read it.