---
title: "CS ADR-DSN.C.230 Slopes on runway end safety areas — Certification Specifications and Guidance Material for Aerodrome Design (CS-ADR-DSN) — Issue 7, Aerodromes · Avioverse"
description: "Longitudinal slopes (1) The slopes of a runway end safety area should be such that no part of the runway end safety area penetrates the approach or…"
url: "https://avioverse.aero/regulations/easa/aerodromes/cs-adr-dsn/chapter-c-runway-end-safety-area/cs-adr-dsn-c-230"
---

# CS ADR-DSN.C.230 Slopes on runway end safety areas

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.C.230 Slopes on runway end safety areas

(a) Longitudinal slopes

(1) The slopes of a [runway](https://avioverse.aero/glossary/easa/runway) end [safety area](https://avioverse.aero/glossary/easa/safety-area) should be such that no part of the runway end safety area penetrates the approach or take-off climb surface.

(2) The longitudinal slopes of a runway end safety area should not exceed a downward slope of 5 %. Longitudinal slope changes should be as gradual as practicable, and abrupt changes or sudden reversals of slopes should be avoided.

(b) Transverse slopes

The transverse slopes of a runway end safety area should not exceed an upward or downward slope of 5 %. Transitions between differing slopes should be as gradual as practicable.

IR · CS ADR-DSN.C.230 — Regulation (EU) No 139/2014 · ED Decision 2014/013/R · Aerodromes Easy Access Rules · EAR revision 13 Mar 2026

[All rules in CHAPTER C — RUNWAY END SAFETY AREA](https://avioverse.aero/regulations/easa/aerodromes/cs-adr-dsn/chapter-c-runway-end-safety-area)

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.