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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ENAC LE1870 Rinconada, ES
Salt spray / neutral salt fog test (ISO ISO 2808 ASTM D 2240 ISO 48-4 ASTM D 4809 + 3 more
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ENAC LE2015 Madrid, ES
DIN EN 17892 ISO 5667-4 ISO 5667-10 ISO 5667-6 ISO 15705 + 3 more
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CANDELTEC

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ENAC LE2410 Bétera, ES
IEC 62471: 2006 IEC 62471-7 UNE-EN 62471 UNE-EN 13032-1 UNE-EN 13032-4 + 3 more
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UKAS 9583 Staffordshire, GB
Volume | Volume/weight HUMAN BODY FLUIDS Andrology examination HUMAN BODY FLUIDS Andrology examination Detection of sperm | 2016 Laboratory gui Detection of sperm | SOP AND-SOP-15
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CARTESY

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DAkkS D-K-22378-01-01 Mühldorf a. Inn, DE
Tensile testing of metallic materials (I Vickers hardness test (ISO 6507) Railway — traction effort and braking fo Railway vehicles — specific test require positiver Überdruck + 3 more
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ENAC LC10.201 Alacant, ES
(0,15 ± 0,02) · 10-2 mol/mol (0,50 ± 0,0 (6,0 ± 1,0) · 10-2 mol/mol (11,5 ± 2,0) (10 ± 2) · 10-6 mol/mol (50 ± 8) · 10-6 (0,15 ± 0,02) · 10-2 mol/mol (0,30 ± 0,0 1,000 ± 0,100 + 3 more
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ACCREDIA 00287 Fidenza, IT
ISO 18787 ISO 4832 ISO 21527-1 ISO 21527-2 DIN EN ISO 4833-1 + 3 more
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CATAS SpA

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ACCREDIA 00024 San Giovanni al Natisone, IT
Salt spray / neutral salt fog test (ISO DIN EN 597-1 DIN EN 597-2 DIN EN 1021-1 DIN EN 1021-2 + 3 more
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ENAC LC10.234 Bollullos de la Mitación, ES
EURAMET cg-17 EURAMET cg-18 CEM Edición
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ACCREDIA 00849 Campagnola di Zevio, IT
DIN EN 27888 DIN EN 12880 DIN EN ISO 15587-2 DIN EN 13657 DIN EN 14346 + 3 more
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DAkkS D-K-15125-01-01 Lorsch, DE
Charpy impact test (ISO 148-1) Salt spray / neutral salt fog test (ISO Railway brake handbooks (UIC 547) Railway bogies — wheelsets and bogies st Taupunkttemperatur + 3 more
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COFRAC 1-6348 Saint-Etienne Cedex 1, FR
DIN EN 15152 NF EN 15152 :
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CDM Smith SE

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DAkkS D-PL-22595-01-02 Crailsheim, DE
DIN EN ISO 19458 DIN EN 932-1 DIN EN ISO 22476-2 DIN 19682-1 DIN 19682-2 + 3 more
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ACCREDIA 00537 Vercelli, IT
ISO 4832 DIN EN ISO 4833-1 DIN EN ISO 6579-1 DIN EN ISO 6888-2 ISO 11731 + 3 more
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CE.R.I.S. Srl

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ACCREDIA 01344 Solofra, IT
ISO 4832 DIN EN ISO 4833-1 DIN EN ISO 18593 DIN EN ISO 19458 DIN EN ISO 11885 + 3 more
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COFRAC 1-0689 Arpajon Cedex, FR
DIN EN ISO 10304-1 DIN EN ISO 17294-2 DIN EN ISO 10704 DIN EN ISO 10703 DIN EN ISO 9698 + 3 more
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COFRAC 1-2334 Is Sur Tille, FR
DIN EN ISO 19017 NF ISO 19017
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COFRAC 1-5571 Soisy Sous Montmorency, FR
NF X 43-257 NF X 43-050 NF X 43-269 NF X 46-032 ISO 16000-7 + 1 more
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COFRAC 1-7012 Fretin, FR
NF X 43-050 NF X 43-269 ISO 16000-7 FD X 46-033
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DAkkS D-K-21434-01-00 Mömlingen, DE
Tensile testing of metallic materials (I Vickers hardness test (ISO 6507) Drehmomentaufnehmer, 0,01 N·m 0,1 N·m 0,05 N·m + 3 more
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ACCREDIA 00302 Ortona, IT
BS EN 15662 UNI EN 15662
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ENAC LE425 Celrà, ES
DIN EN ISO 10304-1 DIN EN ISO 22155 ISO 10304-1 ASTM D56 ÖNORM ISO 22155 + 3 more
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COFRAC 1-0301 Marne La Vallee Cedex 2, FR
ISO ISO 5660-1 EN ISO 1182 EN ISO 1716 DIN EN 12390-3 + 3 more
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COFRAC 1-0552 Grenoble Cedex 09, FR
DIN EN 62471: 2009 DIN EN 1104 DIN EN 1541 ISO 247-1 DIN EN 13286-47 + 3 more
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ACCREDIA 00526 Aci Sant'Antonio, IT
ISO 4832 ISO 21527-1 ISO 21527-2 DIN EN ISO 21528-2 DIN EN 15169 + 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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