---
title: "CS ADR-DSN.B.180 Longitudinal slopes on runway strips — Certification Specifications and Guidance Material for Aerodrome Design (CS-ADR-DSN) — Issue 7, Aerodromes · Avioverse"
description: "The safety objective of longitudinal runway strip slope is to define maximum gradient values that should not interfere with the safe use of the runway…"
url: "https://avioverse.aero/regulations/easa/aerodromes/cs-adr-dsn/chapter-b-runways/cs-adr-dsn-b-180"
---

# CS ADR-DSN.B.180 Longitudinal slopes on runway strips

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.180 Longitudinal slopes on runway strips

(a) The safety objective of longitudinal [runway strip](https://avioverse.aero/glossary/easa/runway-strip) slope is to define maximum gradient values that should not interfere with the safe use of the runway strip by an [aircraft](https://avioverse.aero/glossary/easa/aircraft).

(b) A longitudinal slope along that portion of a strip to be graded should not exceed:

(1) 1.5 % where the code number is 4;

(2) 1.75 % where the code number is 3; and

(3) 2 % where the code number is 1 or 2.

(c) Longitudinal slope changes on that portion of a strip to be graded should be as gradual as practicable, and abrupt changes or sudden reversals of slopes should be avoided.

IR · CS ADR-DSN.B.180 — Regulation (EU) No 139/2014 · ED Decision 2014/013/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.