---
title: "CS HPT-DSN.B.120 Touchdown and lift-off areas (TLOFs) — Certification Specifications and Guidance Material for Heliport Design (CS-HPT-DSN) — Issue 1, Aerodromes · Avioverse"
description: "General: At least one TLOF should be provided at a heliport."
url: "https://avioverse.aero/regulations/easa/aerodromes/cs-hpt-dsn/chapter-b-helicopter-operating-areas/cs-hpt-dsn-b-120"
---

# CS HPT-DSN.B.120 Touchdown and lift-off areas (TLOFs)

Certification Specifications and Guidance Material for Heliport Design (CS-HPT-DSN) — Issue 1 · Regulation (EU) No 139/2014 · EAR revision 13 Mar 2026

IR Implementing rule

## CS HPT-DSN.B.120 Touchdown and lift-off areas (TLOFs)

(a) General:

(1) At least one TLOF should be provided at a [heliport](https://avioverse.aero/glossary/easa/heliport).

(2) One TLOF should be located within the FATO or one or more TLOFs should be collocated with helicopter stands.

(b) Characteristics:

(1) A TLOF should be of sufficient size to contain a circle of diameter of at least 0.83 D of the largest helicopter the area is intended to serve.

(2) Where the TLOF is within the FATO, the TLOF should be dynamic load-bearing.

(3) Where a TLOF is collocated with a [helicopter stand](https://avioverse.aero/glossary/easa/helicopter-stand), the TLOF should be static load-bearing and be capable of withstanding the traffic of the helicopters that the area is intended to serve.

(4) Slopes on a TLOF should be sufficient to prevent accumulation of water on the surface of the area and should not exceed 2 per cent in any direction.

(5) Where a TLOF is located within a FATO which can contain a circle of diameter more than 1 D, the centre of the TLOF should be located not less than 0.5 D from the edge of the FATO.

IR · CS HPT-DSN.B.120 — Regulation (EU) No 139/2014 · ED Decision 2019/012/R · Aerodromes Easy Access Rules · EAR revision 13 Mar 2026

[All rules in CHAPTER B — HELICOPTER OPERATING AREAS](https://avioverse.aero/regulations/easa/aerodromes/cs-hpt-dsn/chapter-b-helicopter-operating-areas)

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.