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
🇩🇪 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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UKAS 7864 Bridgend, GB
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Broadland Group

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UKAS 0295 Norwich, GB
(HSG 264, 2012)
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Broughton Life Sciences

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UKAS 10636 Earby, GB
ISO 20768:2018)
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Brunel University London – Experimental Techniques Centre

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UKAS 2245 Uxbridge, GB
Based on ISO 10312:2019 and ISO SOP 16 by XRD (ISO BS EN
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Bundesamt für Seeschifffahrt und Hydrographie

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DAkkS D-PL-12084-01-00 Hamburg, DE
IEC 60945 IEC 61162-1 IEC 61162-2 IEC 61162-450 IEC 61162-460 + 3 more
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Bundesamt für Strahlenschutz Radon-Kalibrierlaboratorium

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Bundesanstalt für Materialforschung und -prüfung (BAM) Abteilung 7 / Bauwerkssicherheit

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DAkkS D-PL-11075-01-01 Berlin, DE
DIN EN ISO 2808 DIN EN ISO 3219-2 DIN EN ISO 3838 DIN EN 933-1 DIN EN 933-4 + 3 more
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Bundesanstalt für Materialforschung und -prüfung (BAM) Fachbereich 8.1; Sensorik, mess- und prüftechnische Verfahren

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DAkkS D-K-11075-08-00 Berlin, DE
Conformity assessment — requirements for Railway composite brake blocks — require 0,2 kN 0,4 kN 100 kN + 3 more
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Bundesministerium der Verteidigung Bundeswehrkrankenhaus Berlin Abteilung XVI Laboratoriumsmedizin

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NRBC-Normoblasten Anteil unreifer Retikulozyten Erythrozyten DELTA-He Leukozyten + 3 more
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RvA L663 Eindhoven, NL
IEC 18045 IEC 15408-1
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C G C Laboratory

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C-TEC Systemtechnik und Serviceleistung für die Werkstoffprüfung

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C. Grünewälder Waagentechnik CalGroup

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DAkkS D-K-20113-01-00 Wuppertal, DE
Charpy impact test (ISO 148-1) Salt spray / neutral salt fog test (ISO Radiated emissions (CISPR 32) verwendete Abkürzungen:
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C.E.I.A. Spa a socio unico Sez. LACE Laboratorio di Compatibilità Elettromagnetica

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ACCREDIA 01402 Civitella in Valdichiana, IT
ETSI EN 301 489-1: V2.2.3 EN 61000-3-2 and EN 61000-3-3 IEC 61000-6-1 IEC 61000-4-4: 2012 1.4 Electrostatic Discharge EN 61000-4 + 3 more
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UKAS 0156 Congresbury, GB
(HSG 264, 2012) HSG 227 (2004)) Safety Executive guides HSG 264 (2012) and App 3 of HSG 227 (HSG 248) – 2021 + 3 more
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CALTECNICA INGENIEROS

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ENAC LC10.071 Boadilla del Monte, ES
(3 ± 0,5)  10-2 mol/mol (5 ± 0,5)  10- (5 ± 0,5)  10-2 mol/mol - 80 ˚C a 200 ˚C - 20 ˚C a < 23 ˚C 23 ˚C a 40 ˚C > 40 ˚C - 20 ˚C a 60 ˚C + 2 more
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ISO 2808 ISO 48-4 UNE-EN ISO 2808 ISO 2409 UNE-EN ISO 2360 + 3 more
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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) Kraft Railway vehicles — specific test require Railway — traction effort and braking fo + 3 more
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CASERMOVIL, S.A. (Unipersonal)

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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 00024 San Giovanni al Natisone, IT
ISO 9308-1 ISO 7899-2 DIN EN ISO 11205 DIN EN ISO 10304-1 ISO 14189 + 3 more
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ENAC LC10.234 Bollullos de la Mitación, ES
EURAMET cg-18 EURAMET cg-17 CEM Edición
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CBRE GWS Industrial Services GmbH Kalibrierlabor

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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 elektronische Waagen Railway bogies — wheelsets and bogies st Datenlogger mit + 3 more
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COFRAC 1-0301 Marne La Vallee Cedex 2, FR
NF P 92-501 NF P92-512 EN 13823 EN ISO 1716 NF P 92-504 + 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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