---
title: "GM1 ADR-DSN.B.175 Grading of runway strips — Certification Specifications and Guidance Material for Aerodrome Design (CS-ADR-DSN) — Issue 7, Aerodromes · Avioverse"
description: "For a precision approach runway, where the code number is 3 or 4, it may be desirable a greater width of that portion of a strip to be graded should be…"
url: "https://avioverse.aero/regulations/easa/aerodromes/cs-adr-dsn/chapter-b-runways/gm1-adr-dsn-b-175"
---

# GM1 ADR-DSN.B.175 Grading of 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

GM Guidance material

## GM1 ADR-DSN.B.175 Grading of runway strips

(a) For a precision approach [runway](https://avioverse.aero/glossary/easa/runway), where the code number is 3 or 4, it may be desirable a greater width of that portion of a strip to be graded should be considered. Figure GM-B-4 shows the shape and dimensions of a wider strip that may be considered for such a runway. This strip has been designed using information on [aircraft](https://avioverse.aero/glossary/easa/aircraft) running off runways. The portion to be graded extends to a distance of 105 m from the centre line, except that the distance is gradually reduced to 75 m from the centre line at both ends of the strip, for a length of 150 m from the runway end.

\[Figure or form omitted from this preview — available in the Avioverse workspace library.]

Figure GM-B-4. Graded portion of a strip including a precision approach runway where the code number is 3 or 4

(b) Where the areas in paragraph (a) above have paved surface, they should be able to withstand the occasional passage of the critical [aeroplane](https://avioverse.aero/glossary/easa/aeroplane) for runway pavement design.

(c) Additional guidance on grading is given in ICAO Doc 9157, [Aerodrome](https://avioverse.aero/glossary/easa/aerodrome) Design Manual Part 1, Runways.

(d) The area adjacent to the end of a runway provided to reduce the erosive effects of jet blast and propeller wash may be referred to as a blast pad.

(e) Guidance on protection against aeroplane engine blast is given in ICAO Doc 9157, Aerodrome Design Manual, Part 2.

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GM · GM1 ADR-DSN.B.175 — Regulation (EU) No 139/2014 · ED Decision 2022/006/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.