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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ID116 ASTM D 4052 DIN EN ISO 20846 ASTM D 5453 ASTM D 445 + 3 more
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DIN EN ISO 12185 DIN EN ISO 20846 DIN EN ISO 2719 DIN EN ISO 12937 DIN EN 14078 + 3 more
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NF X 43-050 NF X 43-269 ISO 16000-7 FD X 46-033
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ISO 18787 ISO 4832 ISO 15214 ISO 21527-1 ISO 1443 + 3 more
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DIN EN 12880 DIN EN ISO 11885 DIN EN 15408 DIN EN 13657 DIN EN 14346 + 3 more
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ANALYTICAL snc di Emidio ed Eugenio Borghi - Sez. Analisi Alimentari e Autocontrollo

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ANALYTICALAB S.A.S. - S.T.P. DI DAVIDE BERTINAZZO &

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ACCREDIA 00386 Roma, IT
DIN 51436 DIN EN ISO 13473-1 ISO 13473-1 UNI 11095 ASTM E1926-08 + 1 more
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COFRAC 1-1863 Genas, FR
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ANTICO LABORATORI di Antico Alfredo e c

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ANTOS

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COFRAC 1-7202 Courbevoie, FR
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NF X 43-050 NF X 43-269 ISO 16000-7 FD X 46-033
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UKAS 2136 Hebburn, GB
(HSG 248) – 2021 QOP03 based on HSG 248 (PCM) based on HSG 248 QOP01 based on HSG 248
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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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