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
1,323 Accredited labs
15 Countries

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Ramcare

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UKAS 0505 Lancing, GB
DC CURRENT DC VOLTAGE thermometer Pt100 ROTATIONAL SPEED Generate + 3 more
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Reckmann

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DAkkS D-K-22441-01-00 Hagen, DE
Taupunkttemperatur –80 °C Railway braking — urban guided transport Messketten mit 200 °C Datenlogger mit –50 °C + 3 more
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Renishaw

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UKAS 4312 Wotton-under-Edge, GB
volume (CMM’s)
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Rhopoint Metrology

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UKAS 0720 Birmingham, GB
(Steel and tungsten carbide) LENGTH (cont’d) pneumatic tyres (See Note 1) LENGTH (cont.) Plain plug gauges (taper) + 3 more
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Richard L Thomas Associates

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UKAS 0245 Denton, GB
(HSG 264, 2012) HSG 264 (2012) and Appx. 3 of HSG 227 (2004)) Appendix 5 of HSG 227 (2004))
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Riverside Environmental Services

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UKAS 4087 Hextable, GB
(HSG 248) – 2021 OP11 based on HSG 248 (PCM) based on HSG 248 OP04 based on HSG 248
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Riverside Environmental Services

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UKAS 0296 Hextable, GB
(HSG 264, 2012) Appendix 5 of HSG 227 (2004))
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Robert Koch-Institut

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DAkkS D-ML-13113-01-01 Berlin, DE
Salmonellen Salmonella enterica, Shigellen, Yersinie Shigellen Salmonella sv. Paratyphi Neisseria meningitidis, Listeria + 3 more
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Rolf Langenscheid GmbH Waagensystemtechnik

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DAkkS D-K-21801-01-00 Lüdenscheid, DE
Charpy impact test (ISO 148-1) Salt spray / neutral salt fog test (ISO elektronische Waagen 1) In den CMC sind die erweiterten Messu
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Ruhr Lab

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DAkkS D-PL-21007-01-00 Gelsenkirchen, DE
ISO 13909-2 ISO 13909-3 ISO 13909-5 ISO 13909-7 ISO 13909-8 + 3 more
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Ruhr Oel GmbH BP Gelsenkirchen

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DAkkS D-PL-19612-01-00 Gelsenkirchen, DE
DIN EN ISO 12185 DIN EN ISO 3405 DIN EN 13016-1 DIN EN ISO 20884 DIN EN ISO 20846 + 3 more
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Ruhr-Universität Bochum Humangenetik RUB

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DAkkS D-ML-13425-01-00 Bochum, DE
Spinocerebelläre Ataxien Bindegewebserkrankungen: ACTA2, COL1A1, HD; Chorea Huntington (Huntingtin-Gen) Dentatorubrale-Pallidoluysiane + 3 more
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Rwanda Standards Board

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RvA L638 Kicukiro District, Kigali City, RW
ISO 6222 AM09 based on BS ISO 21527-1: ISO 6579-1 ISO 4832 ISO 2171 + 3 more
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S.E. CARBUROS METÁLICOS

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ENAC LC10.069 Sant Celoni, ES
0,03 · 10-2 mol/mol  C < 0,3 · 10-2 mol 0,3 · 10-2 mol/mol  C  1,1 · 10-2 mol/ 1,1 · 10-2 mol/mol ≤ C < 26 · 10-2 mol/m 1,1 · 10-2 mol/mol ≤ C < 26 · 10-2 mol/m 9 · 10-6 mol/mol  C < 75 · 10-6 mol/mol + 3 more
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S.K.I. Schlegel & Kremer Industrieautomation GmbH Kalibrierlabor

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DAkkS D-K-21982-01-00 Mönchengladbach, DE
Durchfluss von 2 m3/h bis 800 rn3/h − Durchfluss von Flüssigkeiten Volumendurchfluss dV/dt von strörnenden + 3 more
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S2 Partnership

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UKAS 27441 Elsworth, GB
(HSG 264, 2012)
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SARIA

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UKAS 2648 Doncaster, GB
AM-01 based on BS 4401:Part 1: AM-32 based on BS 4401:Part 4: AM-03 based on BS ISO 937:2023 AM-04 based on BS ISO AM-31 based on BS EN ISO + 3 more
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SATRA Technology Centre

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UKAS 0248 Kettering, GB
ISO 4931:1986 (withdrawn) ISO 3759:1984 (withdrawn) DIN EN 13759 DIN EN 12150-1 DIN EN ISO 15797 + 3 more
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SAUERMANN IBERICA PUMPS AND INSTRUMENTS, S.L. (Unipersonal)

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ENAC LC10.221 Terrassa, ES
(15 ± 1) ⋅ 10-6 mol/mol (1000 ± 50) ⋅ 10 (8 ± 0,5) ⋅ 10-2 mol/mol (1,4 ± 0,1) ⋅ 1 (3000 ± 150) ⋅ 10-6 mol/mol (9 ± 1) ⋅ 10 (80 ± 8) ⋅ 10-6 mol/mol (100 ± 8) ⋅ 10-6 mol/mol
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SBKS

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DAkkS D-PL-11303-01-01 St. Wendel, DE
DIN 53394-2 DIN 53176 DIN EN ISO 1172 ASTM D 5576 IEC 60512-11-4 + 3 more
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SCHÜCO International KG Technology Center

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DAkkS D-PL-11030-01-01 Bielefeld, DE
DIN EN ISO 717-1 DIN EN ISO 10052 DIN EN ISO 10140-1 DIN EN ISO 10140-2 DIN EN ISO 10140-4 + 3 more
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SEQUOPRO

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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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SCL

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COFRAC 1-0162 Paris, FR
DIN EN ISO 12966-2 DIN EN 12266-2 DIN EN ISO 12966-4 DIN EN 13656 DIN 30660 + 3 more
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SERVICIO DE MEDICIONES CANARIAS

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ENAC LC10.216 Palmas de Gran Canaria, ES
1 mg 2 mg 5 mg 10 mg 20 mg 50 mg 100 mg 10 g 20 g 50 g 100 g 200 g 500 g 1 kg 2 .1 mg 2 mg 5 mg 10 mg 20 mg 50 mg 100 mg
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SERVICIOS AVANZADOS DE INGENIERÍA PARA LA CERTIFICACIÓN Y ACREDITACIÓN, S.L. (SAICA)

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ENAC LC10.191 Puerto de Santa María, ES
CEM DI-021 CEM DI-004 CEM EL-007 CEM DI-003 CEM DI-008 + 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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