UIC 544-2

Railway Braking Force Estimation Methods

UIC 544-2 provides standardized calculation and estimation methods for determining braking force in railway rolling stock across different brake system types and operational scenarios. This technical standard defines mathematical models for translating brake system pressure, line force, and mechanical leverage into actual stopping power, accounting for variables such as wheel slip, temperature effects, and load conditions. The standard enables consistent performance prediction and certification across diverse European rail systems. Accreditation for this calculation methodology ensures reproducible, safety-critical engineering assessments used in rail fleet design and operational planning.

What it measures

  • Brake force calculation from system pressure and geometry
  • Adhesion coefficient effects on available braking force
  • Load-dependent braking force variations
  • Dynamic brake force response characteristics
  • Braking force distribution optimization
🇩🇪 DIN EN 14531-1 🇬🇧 BS EN 14531-1 🇫🇷 NF EN 14531-1 🇮🇹 UNI EN 14531-1 🇪🇸 UNE EN 14531-1 🇳🇱 NEN EN 14531-1
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Institut Technique des Gaz et de l'Air - ITGA - Site de Saint Grégoire

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COFRAC 1-5967 Saint-Gregoire Cedex, FR
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COFRAC 1-5835 Gasny, FR
DIN EN 27888 NF X 31-615 (Uniquement DIN EN ISO 10523
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COFRAC 1-0978 Malakoff, FR
NF X 43-050 NF X 43-269 - Annexe K NF X43-050 (parties utiles de
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COFRAC 1-6752 Ivry Sur Seine, FR
NF X43-050 (parties utiles de la NF X 43-050 NF ISO 22262-1 (parties utiles
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LABOCEA - Site de Brest

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COFRAC 1-7014 Plouzane, FR
DIN EN 13346 CEN / TS 14235 NF T 90-412 DIN EN ISO 7899-1 DIN EN 12880 + 3 more
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COFRAC 1-0871 Coulounieix-Chamiers, FR
DIN EN ISO 17294-2 DIN EN ISO 14403-2 DIN EN ISO 10304-1 NF-T 90-101 NF T90-015-1 + 3 more
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LABORATOIRE DEPARTEMENTAL D'ANALYSES DE GIRONDE

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COFRAC 1-1466 Pessac Cedex, FR
NF V08-106 NF T 90-412 NF EN ISO 7887 – VDE 414-9-11 DIN EN ISO 7899-1 + 3 more
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COFRAC 1-0551 Laon Cedex, FR
DIN ISO 11466 NF X31-120 DIN EN ISO 11885 NF X31-147 DIN EN 16175-1 + 3 more
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COFRAC 1-1046 Les Ponts De Ce, FR
NF V08-401 DIN EN ISO 6888-2 DIN ISO 16649-2 BS ISO 15214:1998 NF V08-409 + 3 more
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COFRAC 1-1105 Serres-Castet, FR
DIN EN 10002-1 ASTM E8/E 8M ASTM A 370 NF EN ISO 6892-1 (méthodes A1, A2 et DIN EN 2002-001 + 3 more
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COFRAC 1-1021 Saint Beauzire, FR
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COFRAC 1-6990 La Ciotat, FR
DIN EN 13624 DIN EN 13727 DIN EN ISO 11930 DIN EN 17387 DIN EN ISO 22717 + 3 more
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COFRAC 1-1979 Limoges, FR
NF V 04-407 DIN EN ISO 6888-1 NF V04-403 0.95) based on BS ISO 21527-2:2008 DIN EN ISO 6888-2 + 3 more
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COFRAC 1-1847 Lyon 7Eme, FR
DIN EN 10002-1 BS ISO 9227:2022 DIN EN ISO 643 EN ISO 12624 DIN EN 10045-1 + 3 more
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COFRAC 1-7045 Sete, FR
NF X 43-050 (parties utiles NF X 43-269 NF X 43-050
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LABÔNOR – Site de LA CAPELLE

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COFRAC 1-1734 La Capelle, FR
DIN EN ISO 8968-1 DIN 19662 DIN EN ISO 5534 DIN EN ISO 8968-4 DIN EN ISO 5764 + 3 more
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COFRAC 1-1290 Marseille Cedex 13, FR
NF V08-106 DIN EN ISO 17294-2 NF T 90-412 NF U47-105 DIN EN ISO 7899-1 + 3 more
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LDA DE L'AIN - Site Agro-Alimentaire

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COFRAC 1-2193 Bourg-En-Bresse Cedex 9, FR
DIN EN ISO 17604 NF V08-401 0.95) based on BS ISO 21527-2:2008 DIN EN ISO 6888-2 DIN ISO 16649-2 + 3 more
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LEPBI - Laboratoire d'Expertise des Polluants du Bâtiment et de l'Industrie

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COFRAC 1-2350 Villepinte, FR
NF X 43-269 DIN 51750-3 NF X 46-032 NF EN 15934 – NF X 43-269 – Annexe K + 3 more
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LHEM

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COFRAC 1-0053 Gonfreville L'Orcher, FR
NF EN ISO 6892-1 Méthode B DIN EN ISO 6508-1 ISO 4969 DIN EN 10002-1 DIN EN ISO 643 + 3 more
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COFRAC 1-0600 Annecy, FR
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COFRAC 1-0606 Trappes Cedex, FR
DIN EN ISO 2505 ISO 18553 AMD 1 DIN EN 12099 ISO 13480 ISO 6964 + 3 more
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COFRAC 1-1531 Venissieux, FR
ISO 15202-3 NF X43-551 NF X 43-317 NF X 43-294 (juin DIN EN ISO 16017-2 + 3 more
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Laboratoire Départemental d'Analyses de Seine-et-Marne (LDA 77)

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COFRAC 1-1140 Dammarie Les Lys, FR
NF EN ISO 19340 DIN EN ISO 10304-1 DIN EN ISO 15061 ISO 5815-1 NF T 90-117 + 3 more
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Laboratoire Départemental d'Analyses et d'Ingénierie du Var- Site de Draguignan

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COFRAC 1-1519 Draguignan, FR
NF T 90-412 DIN EN ISO 7899-1 NF U47-101 DIN EN ISO 21528-2 DIN EN ISO 6888-2 + 3 more
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Industries

Railway rolling stock engineering and design Brake system manufacturers and integrators Railway fleet operators Rail vehicle certification authorities Transport safety and compliance consulting

Related Standards

  • UIC 544-1 Railway brakes — Braking performance
  • UIC 541-01 Railway brakes — Brake pads — Part 1: Friction material specification
  • EN 14531-1 Railway applications — Safety requirements for the design of rolling stock

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