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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Fourstage Environmental

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UKAS 2671 Castle Donington, GB
(HSG 248) – 2021 (PCM) based on HSG 248 DOC/002 based on HSG 248
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5 of HSG 227 (2004) (HSG 264, 2012)
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Fugro GB

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UKAS 0919 Wallingford, GB
BS 1377: Part 2: 1990 BS 1377-3:2018 + A1:2021 ASTM D4186-12: 2020 ASTM D5334-22 ASTM D2216-19 + 3 more
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UKAS 10287 Chelmsford, GB
(HSG 264, 2012)
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Furness Controls

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UKAS 0580 Bexhill, GB
FLOW Gas pressure (absolute) Gas pressure (gauge) DC CURRENT TEMPERATURE + 3 more
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UKAS 2083 Wellington, GB
(HSG 248) – 2021 M4 based on HSG 248 (PCM) based on HSG 248 M3 based on HSG 248 (HSG 264, 2012) + 1 more
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UKAS 2727 Perth, GB
based on ISO 11133:2014+Amd dependent) based on BS EN based on BS EN 12322:1999
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UKAS 4037 Welwyn Garden City, GB
(HSG 248) – 2021 (PCM) based on HSG 248 PRO02 based on HSG 248
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Gaspack Services

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UKAS 4203 Pontypridd, GB
BS EN ISO 18119:2018+A1:2021 BS EN 14876:2007/Internal proceduresDiss BS EN ISO 10460:2018 ISO 23088:2020
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Glasgow City Council

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UKAS 1278 Glasgow, GB
(HSG 248) – 2021 staining based on HSG 248 F2011 (BS 696:Part 2:1989) F0131 (BS 1741:10-1:1989) using F0008 (BS 696:Part 2:1989) using + 3 more
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Global Safety & Environmental

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UKAS 7751 Sawbridgeworth, GB
(HSG 264, 2012)
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Green Shield Environmental

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UKAS 9528 Stevenage, GB
Appendix 5 of HSG 227 (2004) (HSG 264, 2012)
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Gully Howard Technical

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UKAS 2735 Portsmouth, GB
(HSG 248) – 2021 (PCM) based on HSG 248
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Gully Howard Technical

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UKAS 0363 Portsmouth, GB
HSG 227 (2004)) (HSG 264, 2012) HSG 264 (2012) and Appx. 3 of Appendix 5 of HSG 227 (2004))
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UKAS 4026 Meopham, GB
(HSG 248) – 2021 (PCM) based on HSG 248 (HSG 264, 2012)
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UKAS 1105 Nuneaton, GB
IEC/CISPR 25 DIN EN 55025: 2018 ISO 7637-2 ISO 11451-1 IEC/CISPR 12 + 3 more
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UKAS 0642 Ross-on-Wye, GB
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UKAS 0024 Southsea, GB
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Hartford Steam Boiler UK

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UKAS 8452 Manchester, GB
BS 2790 - Specification for the design a BS 1113 - Specification for the design a BS EN 13480 Parts 1 to 8 - Metallic EN 13445 – Parts 1 to 10 Unfired pressur BS EN ISO 15614 and ASME IX + 3 more
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Healthy Buildings (Ireland) Ltd

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UKAS 4659 Newry, GB
(HSG 264, 2012) and Appx. 3 of HSG 227 (2004)) Executive guides HSG 264 (2012)
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Heywood Williams Components

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UKAS 9868 Daventry, GB
DIN EN 1026 DIN EN 12046-2 BS 6375-1:2015 + A1:2016 and the DIN EN 1027 DIN EN 1629 + 3 more
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UKAS 24561 Hertford, GB
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I2 Analytical

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UKAS 4041 Croxley Green, GB
staining based on HSG 248. (HSG 248) – 2021 (PCM) based on HSG 248 A007B based on BS EN15051-2:2013 +1:2016 DIN EN 12457-3 + 3 more
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ITS Testing Services (UK)

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UKAS 1516 Leigh, GB
BS EN ISO 1833-1:2020 And the following parts of ISO 1833 ISO 1833-4:2017/EU Reg. method 2ISO 1833 ISO 1833-3: 2019 ISO 1833-6: 2019 + 3 more
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ITS Testing Services (UK) Limited (Aberdeen Laboratory)

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UKAS 0101 Bridge of Don, GB
ASTM D 5443 ASTM D2892 (modified) ASTM D2503 ASTM D4052 (modified) ASTM D2887 (modified) + 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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