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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Tetra Tech

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UKAS 6060 Leeds, GB
(HSG 248) – 2021 &10 based on HSG 248 (PCM) based on HSG 248
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TetraTec Instruments

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DAkkS D-K-17589-01-01 Steinenbronn, DE
Railway brakes — disc brake pads (UIC 54 Volumendurchfluss bzw. 0,01 m Railway pantographs — requirements for m 39 mL/h + 3 more
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The Auditing Company

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RvA I309 Culemborg, NL
#EN ISO 5164:14 # EN 116-97 # ISO 13736 NEN 4400-1 #ISO 6618
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The Hazard Management and Environmental Services Laboratories

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UKAS 0225 Fenstanton, GB
(HSG 264, 2012)
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The Hazard Management and Environmental Services Laboratories

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UKAS 0575 Fenstanton, GB
(HSG 248) – 2021 03 based on HSG 248) QOP01 based on HSG 248 (PCM) based on HSG 248
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The Testing Lab

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UKAS 7758 Doncaster, GB
DIN EN 933-11 BS EN ISO 17892-1:2014+A1:2022 BS EN ISO 17892-10:2018 BS EN ISO 17892-11:2019 BS EN ISO 17892-2:2014 + 3 more
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The Tintometer

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UKAS 0630 Amesbury, GB
SPECTRAL TRANSMITTANCE Wavelength 380 nm materials
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Themisis

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RvA I381 Zaltbommel, NL
#EN ISO 5164:14 # EN 116-97 # ISO 13736 NEN 4400-1 #ISO 6618
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Thermo Electron LED

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DAkkS D-K-17616-01-01 Langenselbold, DE
- Gleichspannung Messgeräte 0,001 V bis 0,33 V bis 3,3 V bis 330 V bis + 3 more
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Thermo Sensor

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DAkkS D-K-18093-01-00 Werne, DE
Tensile testing of metallic materials (I Temperaturmessgrößen thermometer und Railway braking — urban guided transport Railway vehicle body structural requirem + 3 more
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ThermoTEC Weilburg

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DAkkS D-K-19243-01-00 Weilburg, DE
Vickers hardness test (ISO 6507) Taupunkttemperatur Widerstandssensor * –90 °C –80 °C –40 °C + 3 more
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Thomas Dudley

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UKAS 20013 Dudley, GB
BS 1212-2:1990 Clause 4 BS 1212-3:1990 Clause 4 DIN EN 997 Laktoseintoleranz (LCT -14055 BS 1212-4:1991 Clause 4, 13, 14
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Threadmaster Gauges

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UKAS 0249 Kenilworth, GB
LENGTH LENGTH (cont’d)
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Thüringer Landesamt für Verbraucherschutz Abteilung Mess- und Eichwesen, Beschussamt

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DAkkS D-K-18223-01-02 Ilmenau, DE
Masse oder Konventioneller Wägewert/ Massenormal *) > 1 mg + 3 more
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Toni Technik Baustoffprüfsysteme GmbH Service Prüftechnik Kalibrierlaboratorium

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DAkkS D-K-17246-01-00 Berlin, DE
Railway brake — magnetic track brakes (U Kraft (WPM) Länge (WPM) a) nur Vor-Ort-Kalibrierungen Vickers hardness test (ISO 6507) + 3 more
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Total Clean Air

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UKAS 27642 Somerset, GB
ISO 14644-3 BS EN ISO 14644-2:2015:Part 2 DIN EN 12469 BS EN ISO 14644-1:2015 BS EN ISO 14644-4:2022 + 3 more
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Trescal

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DAkkS D-K-15015-01-01 Darmstadt, DE
- Gleichspannung / Messgeräte 10 V; 100 V; 1000 V > 100 mV > 0,22 V + 3 more
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Trident Surveying

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UKAS 8188 Sunderland, GB
Analysts’ Guide (HSG 248) (PCM) based on HSG 248
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Tru-Cal Metrology

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UKAS 0716 Gorton, GB
including dial and digital LENGTH (cont’d) Plain plug gauges (taper) ANCILLARY MEASUREMENTS Plain ring gauges (taper) + 3 more
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Tyneside Standards

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UKAS 0566 Jarrow, GB
Micrometers See Notes 3 and 5 See Note 6 Caliper length bars) – See Note 5 + 3 more
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TÉCNICAS Y SERVICIOS DE INGENIERÍA Y CONTROL DEL NORTE, S.L (TESICNOR)

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ENAC LE2354 Noáin, ES
UNE-EN 60903 UNE-EN IEC 61243-1 UNE-EN 50508 UNE 204001 UNE-EN 61111 + 2 more
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TÜV NORD Mobilität

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DAkkS D-K-11109-01-02 Essen, DE
positiven Überdruck positiver Überdruck - Gleichstromstärke Kraft Schließ- und + 3 more
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TÜV NORD Mobilität GmbH & Co. KG IFM - Institut für Fahrzeugtechnik und Mobilität

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DAkkS D-PL-11109-01-06 Essen, DE
ISO 26262-2 ISO 26262-3: ISO 26262-4 ISO 26262-5 ISO 26262-6 + 3 more
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TÜV NORD Nederland

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RvA I167 Son En Breugel, NL
DIN EN ISO 17232 DIN EN 14960 NEN 3140 #EN ISO 5164:14 EN 1069 + 3 more
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TÜV Rheinland Energy & Environment GmbH Test Centre for Energy Appliances

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DAkkS D-PL-11120-04-00 Köln, DE
DIN EN 12897 DIN EN 15332 DIN SPEC 1101 DIN EN 303-5 DIN EN 13126-19 + 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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