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
🇧🇪 NBN EN 14531-1 🇩🇪 DIN EN 14531-1 🇬🇧 BS EN 14531-1 🇫🇷 NF EN 14531-1 🇮🇹 UNI EN 14531-1 🇪🇸 UNE EN 14531-1 🇳🇱 NEN EN 14531-1
3,525 Accredited labs
21 Countries

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COFRAC 1-1761 Saint Etienne, FR
DIN EN ISO 16017-1 DIN ISO 16000-4 DIN EN ISO 16017-2 ISO 22262-1 DIN EN ISO-16017-1 + 3 more
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COFRAC 1-5967 Saint-Gregoire Cedex, FR
DIN EN ISO 16017-1 DIN ISO 16000-4 DIN EN ISO 16017-2 ISO 22262-1 DIN EN ISO-16017-1 + 3 more
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JCONSULTANT

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COFRAC 1-5882 Tarbes, FR
NF X 43-050 NF X 43-269 ISO 16000-7 FD X 46-033
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KALI'AIR

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COFRAC 1-1848 Sainghin-En-Melantois, FR
DIN EN 13126-19 DIN EN ISO 16911-1 DIN EN 13284-1 DIN EN 14790 DIN EN 12341 + 3 more
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KALI'AIR SUD

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COFRAC 1-5567 Aix-En-Provence, FR
DIN EN 13126-19 DIN EN ISO 16911-1 DIN EN 13284-1 DIN EN 14790 DIN EN 14792 + 3 more
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COFRAC 1-10006 Le Merevillois, FR
Tensile testing of metallic materials (I Charpy impact test (ISO 148-1) ISO 6892-2 DIN EN 10002-5 DIN EN 10045-1 + 3 more
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L3A AIR

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COFRAC 1-6059 Malakoff, FR
ISO 16740 NF X 43-257 NF X 43-298 NF X 43-050 NF X 43-269 + 3 more
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LABEXAN

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COFRAC 1-5810 Cognac, FR
DIN EN ISO 16212 DIN EN ISO 18416 DIN EN ISO 21149 DIN EN ISO 21150 DIN EN ISO 22717 + 3 more
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COFRAC 1-7016 - Javene, FR
DIN EN 27888 ISO 4831 DIN ISO 16649-2 DIN EN ISO 4833-1 DIN EN ISO 6579-1 + 3 more
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COFRAC 1-1747 Casablanca, FR
(p.Ala222Val); dbSNP rs1801133 ISO 3656 DIN EN 1135 BS EN 15662 DIN 10113-2 + 3 more
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COFRAC 1-0871 Coulounieix-Chamiers, FR
DIN EN 27888 ISO 4831 ISO 4832 ISO 15214 ISO 21527-1 + 3 more
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COFRAC 1-0551 Laon, FR
ISO DIN EN 27888 ISO 4832 ISO 15213 ISO 15214 + 3 more
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COFRAC 1-6954 Pardies, FR
DIN EN 13126-19 DIN EN 14790 DIN EN 14792 DIN EN ISO 21877 DIN EN 14789 + 3 more
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COFRAC 1-6923 Papeete, FR
NF X 43-050 NF X 43-269 ISO 16000-7 FD X 46-033
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COFRAC 1-1046 Les Ponts De Ce, FR
ISO DIN EN 27888 ISO 4832 ISO 15214 DIN ISO 16649-2 + 3 more
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COFRAC 1-1105 Serres-Castet, FR
Charpy impact test (ISO 148-1) ISO DIN EN ISO 4136 DIN EN ISO 9016 DIN EN ISO 6506-1 + 3 more
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COFRAC 1-6990 La Ciotat, FR
DIN EN ISO 16212 DIN EN ISO 18415 DIN EN ISO 18416 DIN EN ISO 21149 DIN EN ISO 21150 + 3 more
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COFRAC 1-1979 Limoges, FR
ISO 18787 ISO 15214 ISO 21527-1 ISO 21527-2 DIN EN ISO 6579-1 + 3 more
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COFRAC 1-0621 Casablanca, FR
DIN EN 60068-2-75 IEC 60335-1: 2010 IEC 60884-1: 2002 IEC 60884-2-5: 1995 IEC 60947-2 + 3 more
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COFRAC 1-2453 Arques, FR
ASTM C927-80 ASTM E 308 ASTM C738-94 ISO 6486-1 et -2 ISO 24117 + 2 more
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COFRAC 1-10085 Arques, FR
ASTM C927-80 ASTM C738-94 ISO 6486-1 et -2 ISO 7086-1 et 2 NF EN 1388-1 et 2
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COFRAC 1-1847 Lyon 7Eme, FR
Tensile testing of metallic materials (I Charpy impact test (ISO 148-1) Salt spray / neutral salt fog test (ISO ISO (NM_001718: c.1-c.500) + 3 more
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LABORATORIZ

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COFRAC 1-1099 Nimes, FR
NF EN ISO 11746 ISO 712-1 NF ISO 7301 NF ISO 6646 NF ISO 14864
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LABOSPORT

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COFRAC 1-2113 Le Mans, FR
DIN EN 933-1 DIN EN 1097-3 DIN EN 13126-16 DIN EN 1969 DIN EN 12230 + 3 more
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COFRAC 1-1545 Velizy-Villacoublay, FR
IEC 62387 ISO 21909 NF EN 62387
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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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