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ISO/AWI 24221

Railway applications — Braking system — General requirements

General information

20.00     Jun 11, 2026

ISO

ISO/TC 269/SC 2

International Standard

Scope

This document specifies the general requirements for brake systems. This document focuses on general principles and general requirements of brake systems.
This document is applicable for all types of rolling stock during design and whole lifetime. This document does not specify the braking performance criteria.
This document can be applied to all rolling stock with metal to metal wheel/rail contact irrespective of speed classification.

Life cycle

PREVIOUSLY

PUBLISHED
ISO 24221:2024

IN_DEVELOPMENT
ISO 24221:2024/FDAmd 1

NOW

IN_DEVELOPMENT
ISO/AWI 24221
20.00 New project registered in TC/SC work programme
Jun 11, 2026