---
title: "CS ADR-DSN.B.155 Length of runway strip — Certification Specifications and Guidance Material for Aerodrome Design (CS-ADR-DSN) — Issue 7, Aerodromes · Avioverse"
description: "A strip should extend before the threshold and beyond the end of the runway or stopway for a distance of at least:"
url: "https://avioverse.aero/regulations/easa/aerodromes/cs-adr-dsn/chapter-b-runways/cs-adr-dsn-b-155"
---

# CS ADR-DSN.B.155 Length of runway strip

Certification Specifications and Guidance Material for Aerodrome Design (CS-ADR-DSN) — Issue 7 · Regulation (EU) No 139/2014 · EAR revision 13 Mar 2026

IR Implementing rule

## CS ADR-DSN.B.155 Length of runway strip

(a) A strip should extend before the [threshold](https://avioverse.aero/glossary/easa/threshold) and beyond the end of the [runway](https://avioverse.aero/glossary/easa/runway) or [stopway](https://avioverse.aero/glossary/easa/stopway) for a distance of at least:

(1) 60 m where the code number is 2, 3, or 4;

(2) 60 m where the code number is 1 and the runway is an instrument one; and

(3) 30 m where the code number is 1 and the runway is a non-instrument one.

\[Issue: ADR-DSN/3]

IR · CS ADR-DSN.B.155 — Regulation (EU) No 139/2014 · ED Decision 2016/027/R · Aerodromes Easy Access Rules · EAR revision 13 Mar 2026

[All rules in CHAPTER B — RUNWAYS](https://avioverse.aero/regulations/easa/aerodromes/cs-adr-dsn/chapter-b-runways)

Consolidated from the EASA Easy Access Rules (revision 13 Mar 2026, extracted 13 Oct 2026) for convenience. Not the official publication — verify against the Official Journal of the European Union and the EASA publications before operational use.