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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ISO 11731 ISO 6222 ISO 7899-2 ISO 9308-1 ISO 23695 + 3 more
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NF T 90-333 NF T 90-388 NF T 90-395 XP T90-383
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DAkkS D-K-21939-01-01 St. Georgen im Schwarzwald, DE
Vibration measuring instruments — requir Kraft (WPM) − Strömungsgeschwindigkeit von Gasen Rollenprüfständen 100 N entsprechen + 3 more
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OMIM# 614024 DIN EN ISO 6270-2 DIN EN 60529 ASTM D 3948 ASTM D 1121 + 3 more
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DAkkS D-K-11030-01-01 Bielefeld, DE
Railway brake — anti-slide device (UIC 5 Railway brake — magnetic track brakes (U Railway brakes — conditions for homologa Railway brakes — disc brake pads (UIC 54 Railway brakes — brake performance (UIC + 3 more
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BELAC 081-TEST Elsene, BE
ISO 6888-2 Méthode interne selon le Manual of Clini Méthode interne selon Seeliger, H.P.R. a Le Minor L. et Richard C. Méthodes de la Luminex Magpix Wuyts et al. 2015 + 3 more
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ENAC LC10.166 Tres Cantos, ES
0,015 l/min ≤ Q ≤ 40 l/min 0,0 · 10-9 mol/mol 20 ⋅ 10-9 mol/mol ≤ C ≤ 500 ⋅ 10-9 mol/m 0,00 · 10-6 mol/mol 0,5 ⋅10-6 mol/mol ≤ C ≤ 10 ⋅10-6 mol/mol + 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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ACCREDIA 00454 Sassari, IT
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Circ Min Trasp n 18911 02/08/2018
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DIN EN 12879 DIN EN 12880 DIN EN ISO 19458 DIN EN ISO 11885 DIN EN ISO 10523 (C 5) + 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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