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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21 Countries

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COFRAC 1-5517 Armentieres, FR
DIN EN 27888 DIN EN 13126-19 DIN EN ISO 10523 ISO 10780 DIN EN ISO 16911-1 + 3 more
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COFRAC 1-2416 La Ciotat, FR
DIN EN 12469 ISO 14644-3 BS EN ISO 14644-1:2015 NF X 44-201 (Octobre 1984) pour PSM NF S 90-351 + 1 more
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COFRAC 1-5925 Champlan, FR
NF X 43-257 NF X 43-050 NF X 43-269 ISO 16000-7 FD X 46-033
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COFRAC 1-6376 Geispolsheim, 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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COFRAC 1-1147 Sainte-Croix-En-Plaine, FR
ISO 4832 ISO 15213 ISO 15214 ISO 21527-1 ISO 21527-2 + 3 more
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COFRAC 1-2465 Aix-En-Provence, FR
DIN EN ISO 16212 DIN EN ISO 21149 DIN EN ISO 11930 DIN EN ISO 11646 DIN EN ISO 12625-8 + 3 more
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COFRAC 1-1488 Saverne, FR
DIN EN 27888 DIN EN 12880 DIN EN ISO 11885 DIN EN ISO 10523 DIN EN 1484 + 3 more
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COFRAC 1-2202 Douai, FR
DIN EN 27888 DIN EN 12880 DIN EN ISO 11885 DIN EN ISO 10523 DIN ISO 17289 + 3 more
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COFRAC 1-6950 Petit Couronne, FR
DIN EN 27888 DIN EN 12880 DIN EN ISO 10523 DIN ISO 17289 DIN EN 1484 + 3 more
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COFRAC 1-2243 Vennecy, FR
ISO 15214 ISO 21527-1 ISO 21527-2 DIN ISO 16649-2 DIN EN ISO 6579-1 + 3 more
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COFRAC 1-6881 Aix-En-Provence, FR
ISO 4832 ISO 15214 ISO 21527-1 ISO 21527-2 DIN ISO 16649-2 + 3 more
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COFRAC 1-2241 Douai, FR
ISO 18787 ISO 15213 ISO 15214 ISO 21527-1 ISO 21527-2 + 3 more
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COFRAC 1-1830 Nantes, FR
ISO 4831 ISO 4832 ISO 15213 ISO 15214 ISO 21527-1 + 3 more
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COFRAC 1-5895 Bagneux, FR
NF X 43-257 NF X 43-050 NF X 43-269 ISO 16000-7 FD X 46-033
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COFRAC 1-5894 Saverne, FR
NF X 43-257 NF X 43-050 NF X 43-269 NF X 43-259 NF X 43-296 + 2 more
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COFRAC 1-7559 Dunkerque, FR
NF X 43-257 NF X 43-050 NF X 43-269 NF X 43-259 NF X 43-296 + 3 more
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COFRAC 1-6823 Henin-Beaumont, FR
NF X 43-257 NF X 43-050 NF X 43-269 NF X 43-259 NF X 43-296 + 3 more
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COFRAC 1-5943 Nantes, FR
ISO NF X 43-050 NF X 43-269 ISO 16000-7 FD X 46-033
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COFRAC 1-5896 Venissieux, FR
NF X 43-050 NF X 43-269 ISO 16000-7 FD X 46-033
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COFRAC 1-0912 Colomiers, FR
Tensile testing of metallic materials (I Charpy impact test (ISO 148-1) Salt spray / neutral salt fog test (ISO DIN EN ISO 1463 DIN EN ISO 6892-2 + 3 more
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COFRAC 1-6925 Saverne, FR
DIN EN ISO 15549 DIN ISO 16000-3 DIN EN ISO 17294-2 DIN EN 13284-1 DIN EN ISO 16017-1 + 3 more
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COFRAC 1-6428 Volvic, FR
DIN EN 27888 DIN EN ISO 10523 DIN ISO 17289 ISO 10523 on BS ISO 17289:2014 + 3 more
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COFRAC 1-0201 Bordeaux, FR
ISO (CD45/CD19/CD5/CD20/CD23/CD20 (NM_000384: c.1-c.82) DIN EN ISO 9239-1 EN ISO 1716 + 3 more
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COFRAC 1-6514 Saint-Marcel, FR
Tensile testing of metallic materials (I Charpy impact test (ISO 148-1) DIN EN ISO 4136 DIN EN ISO 5173 DIN EN ISO 9016 + 3 more
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FRD-CODEM

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COFRAC 1-7319 Amiens, FR
DIN EN ISO 12571 DIN EN ISO 16535 DIN EN ISO 29767 DIN EN 1609 DIN EN 12664 + 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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