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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FRAMATOME - Etablissement de Jeumont

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COFRAC 1-6523 Jeumont, FR
DIN EN ISO 6508-1 DIN EN ISO 3651-2 DIN EN ISO 4136 ISO 4969 DIN EN 10002-1 + 3 more
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FRAMATOME - Saint-Marcel

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COFRAC 1-6514 Saint-Marcel, FR
DIN EN ISO 6507-1 DIN EN ISO 643 NF EN ISO 6520-1 DIN EN ISO 17639 NF EN ISO 6520-2 + 3 more
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GINGER CEBTP

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COFRAC 1-0002 Elancourt, FR
DIN EN 1097-1 DIN EN ISO 10140-2 DIN EN 933-3 DIN EN 1097-2 DIN EN ISO 10140-4 + 3 more
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GINGER LECES

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COFRAC 1-7433 Saint-Julien-Les-Metz, FR
DIN EN 14385 ETSI EN 301 489-1 V2.2.3 2019-11 NF X43-551 IS EN 1948-1:2006 2006 DIN EN 14789 + 3 more
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GRAND EST ANALYSES

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COFRAC 1-6977 Wintzenheim, FR
NF X 43-269 – Annexe K NF X 43-050 NF X43-050 (parties utiles de la
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HOP'LAB

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COFRAC 1-6221 Strasbourg, FR
NF X43-050 (parties utiles de NF X 43-050 NF X43-050 (parties utiles de la
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IANESCO

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COFRAC 1-6209 Poitiers, FR
DIN EN ISO 17294-2 ISO 7086-2:2000 DIN EN ISO 14403-2 DIN EN ISO 13395 NF T 90-412 + 3 more
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IFTS

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COFRAC 1-0847 Foulayronnes, FR
NF X 45-301 NF X 45-302 NF X 45-303 ASTM F795-88 NF P 90-319 de 02/2011 + 3 more
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IGIENAIR LORRAINE

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COFRAC 1-6747 Atton, FR
NF EN 12469 Annexe G NF S 90-351 NF EN 12469 Annexe D NF X 15-206 DIN EN 14175-4 + 3 more
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IGIENAIR RHONE - ALPES

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COFRAC 1-6558 Bron, FR
NF EN 12469 Annexe G NF EN 12469 Annexe H NF EN 12469 Annexe D DIN EN 14175-4 NF S 90-351 + 3 more
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IGIENAIR SUD EST

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COFRAC 1-6559 Aix-En-Provence, FR
NF EN 12469 Annexe G NF S 90-351 NF EN 12469 Annexe D NF X 15-206 DIN EN 14175-4 + 3 more
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INOVALYS - Site de Nantes

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COFRAC 1-7140 Nantes Cedex 3, FR
NF V 05-116 NF V 04-415 NF V 04-407 NF V04-403 NF V04-401 + 3 more
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INOVALYS - Site de Vannes

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COFRAC 1-7142 Saint Ave, FR
NF V08-106 DIN EN ISO 17294-2 DIN EN ISO 21528-2 ISO 19343 NF T90-105-2 + 3 more
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INSTITUT MECASEM

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COFRAC 1-7322 Ostwald Cedex, FR
(BS EN ISO 6892-1: 2019) ASTM E8/E 8M DIN EN 10002-1 ASTM E8 et E8M DIN EN 2002-001 + 3 more
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INTERTEK FRANCE

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COFRAC 1-7401 Heudebouville, FR
DIN EN 12469 NF S 90-351 BS EN ISO 14644-1:2015 ISO 14644-3
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INTERTEK France

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COFRAC 1-1296 Heudebouville, FR
DIN EN ISO 1833-6 DIN EN ISO 1833-2 DIN EN ISO 1833-7 DIN EN ISO 1833-1 DIN EN ISO 1833-20 + 3 more
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ITGA NORMANDIE

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COFRAC 1-6304 Petit Couronne, FR
NF X43-050 (parties utiles de ISO 22262-1 NF X 43-050 NF X 43-269 - Annexe K
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Institut Technique des Gaz et de l'Air - ITGA - Site St Grégoire K

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COFRAC 1-5970 Saint-Gregoire, FR
ISO 22262-1 NF X 43-050 NF X43-050 (parties utiles de la
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Institut Technique des Gaz et de l'Air - ITGA - Site de Brest

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COFRAC 1-6090 Brest, FR
ISO 22262-1 NF X 43-050 NF X 43-269 – NF X43-050 (parties
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Institut Technique des Gaz et de l'Air - ITGA - Site de La Réunion

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COFRAC 1-6585 Sainte Marie, FR
ISO 22262-1 NF X 43-050 NF X 43-269 – NF X43-050 (parties utiles de
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Institut Technique des Gaz et de l'Air - ITGA - Site de Lille

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COFRAC 1-5971 Villeneuve D'Ascq, FR
NF X 43-269 DIN EN ISO 16017-1 NF X 43-007 NF X 46-032 NF X 43-298 + 3 more
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Institut Technique des Gaz et de l'Air - ITGA - Site de Metz

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COFRAC 1-6091 Metz, FR
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Institut Technique des Gaz et de l'Air - ITGA - Site de Meyreuil

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COFRAC 1-1029 Meyreuil, FR
NF X 43-269 DIN EN ISO 16017-1 NF X 43-298 NF X 46-032 ISO 22262-1 + 3 more
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Institut Technique des Gaz et de l'Air - ITGA - Site de Mérignac

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COFRAC 1-5968 Merignac, FR
NF X 43-269 DIN EN ISO 16017-1 NF X43-269 – Annexe NF X 43-007 NF X 43-298 + 3 more
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Institut Technique des Gaz et de l'Air - ITGA - Site de Saint Etienne

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COFRAC 1-1761 Saint Etienne, FR
NF X 43-269 NF X 43-007 NF X 46-032 NF X 43-014 NF X 43-259 + 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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