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
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COFRAC 1-1151 Saint-Julien-Les-Metz, FR
DIN EN 27888 DIN EN 12880 DIN EN ISO 11885 DIN EN ISO 10523 DIN EN ISO 10304-1 + 3 more
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MITSUBISHI ELECTRIC EUROPE BV

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DIN EN 14511-2 DIN EN 14511-3 DIN EN 14511-4 DIN EN 14825 NF EN 16147
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COFRAC 1-6902 Antony, FR
NF X 43-050 NF X 43-269 ISO 16000-7 FD X 46-033
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ISO 4831 ISO 4832 ISO 21527-1 ISO 21527-2 DIN ISO 16649-2 + 3 more
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COFRAC 1-7338 Toulouse, FR
NF X 43-050 NF X 43-269 ISO 16000-7 FD X 46-033
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COFRAC 1-7030 Brest, FR
NF X 43-257 NF X 43-050 NF X 43-269 NF X 43-275 ISO 16000-7 + 1 more
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COFRAC 1-1033 Saint Symphorien, FR
DIN EN ISO 14780 DIN EN ISO 17831-1 DIN EN ISO 18122 DIN EN ISO 18134-2 DIN EN 1856-1 + 3 more
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COFRAC 1-5948 Cognac, FR
NF X 43-050 NF X 43-269 NF X 43-269 - Annexe K NF X43-050 (parties utiles de ISO 16000-7 + 1 more
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PRISE D'AIR

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COFRAC 1-6799 Le Moule, FR
NF X 43-050 NF X 43-269 ISO 16000-7 FD X 46-033
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PRO' AIR

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COFRAC 1-5789 Montois-La-Montagne, FR
NF X 43-050 NF X 43-269 NF X 43-269 - Annexe K NF X43-050 (parties utiles de ISO 16000-7 + 1 more
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QUALITAT EXPERTISES

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COFRAC 1-6109 Clichy Cedex, FR
NF X 43-050 NF X 43-269 ISO 16000-7 FD X 46-033
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COFRAC 1-7303 Champdeniers, FR
DIN EN 27888 ISO 4832 ISO 15214 ISO 21527-1 ISO 21527-2 + 3 more
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RESCOLL - Pessac

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COFRAC 1-1995 Pessac Cedex, FR
ISO 5658-2 ISO 5660-1 DIN EN 17084 DIN EN 45545-2 DIN EN 61006 + 3 more
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ROBINET CONTROLE ENVIRONNEMENTAL

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COFRAC 1-6116 Belleville Sur Meuse, FR
NF X 43-257 NF X 43-298 NF X 43-050 NF X 43-269 ISO 16000-7 + 1 more
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SADEF

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COFRAC 1-0751 Aspach Le Bas, FR
DIN EN 60601-2-37 DIN EN 27888 DIN ISO 16649-2 DIN EN ISO 6579-1 DIN EN ISO 11290-1 + 3 more
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COFRAC 1-1635 Annecy, FR
NF T 90-333 NF T 90-388 NF T 90-354 NF T 90-395 XP T90-337 + 1 more
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COFRAC 1-6194 - Marne La Vallee Cedex 4 20 Av Christian Doppler, FR
NF X 43-050 NF X 43-269 ISO 16000-7 FD X 46-033
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COFRAC 1-6228 Delain, FR
NF X 43-050 NF X 43-269 ISO 16000-7 FD X 46-033
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COFRAC 1-0135 Nantes, FR
DIN EN 13203-1 DIN EN 13203-2 DIN EN 15502-1 DIN EN 15502-2-1 DIN EN 15502-2-1
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COFRAC 1-7502 Bonneville, FR
DIN EN 27888 DIN EN 12880 DIN EN ISO 10523 DIN ISO 17289 DIN EN 26777 + 3 more
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COFRAC 1-5621 Nantes, FR
NF T 90-333 NF T 90-388 NF T 90-395 XP T90-383
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COFRAC 1-10008 La Rochelle, FR
ASTM F1980 ASTM F2096 ISO 11607-1 ASTM F1886 NF EN 868-5 annexe D NF EN 868-5 Annexe E + 3 more
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COFRAC 1-0162 Paris, FR
ISO DIN EN ISO 12966-2 DIN EN ISO 12966-4 ISO 3656 DIN EN ISO 6579-1 + 3 more
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SGS France - Aix-en-Provence

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COFRAC 1-6488 Aix-En-Provence, FR
DIN EN 14183 DIN EN 13893 DIN EN 14041 EN 12586 EN 14372 + 3 more
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COFRAC 1-6451 Saint-Priest, FR
NF X 43-050 NF X 43-269 ISO 16000-7 FD X 46-033
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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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