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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UKAS 9659 Grimsby, GB
ISO 21527-1 ISO 4833-1 ISO 15213-2 ISO 10272-1 ISO 16654 + 3 more
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UKAS 2622 Linlithgow Bridge, GB
ISO 4832 DIN ISO 16649-1 ISO 6579-1 ISO 6888-1 ISO 13720 + 3 more
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UKAS 0342 Wolverhampton, GB
ISO ISO 15214 ISO 21527-1 ISO 21527-2 DIN EN ISO 11290-1 + 3 more
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UKAS 1780 Wickford, GB
(HSG 248) – 2021 (PCM) based on HSG 248 M002based on HSG 248
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UKAS 0183 Norwich, GB
FREQUENCY Frequenc 220 mV range 10 Hz to 100 kHz difference from 10 % to 100 % of the sta 6105A control 0° to 360° + 3 more
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UKAS 1497 Carrickfergus, GB
ISO Mark Casting (TS5527)
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UKAS 9875 Benfleet, GB
(HSG 248) – 2021 (PCM) based on HSG 248
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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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UKAS 4155 Sunderland, GB
(HSG 264, 2012) 5 of HSG 227 (2004)
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UKAS 27405 Lyne, GB
Ethanol Digoxin HbA1c Cortisol Glucose + 3 more
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UKAS 9737 Frimley, GB
Parainfluenza RNA Hepatitis B-e-Antigen SARS-CoV-2 RNA Hepatitis-A IgG Hepatitis-A IgM + 3 more
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UKAS 9738 Frimley, GB
Plasma | Thromboplastin Time (APTT) Plasma | Collagen Binding Activity Plasma | Fibrinogen (Clauss) Whole Blood :EDTA | Atypical antibody sc Plasma | DOACs: Rivaroxaban, technique + 3 more
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UKAS 8086 Frimley, GB
Fungi Measurement Demonstration of: | Operation and Mainte Human tissue samples/ | Detection of Her Bacteria + 3 more
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UKAS 9727 Guildford, GB
CA 125 Calcium Mycobacterium tuberculosis CMV Red Blood Cells + 3 more
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UKAS 8089 Reading, GB
Ethanol Digoxin Cortisol Glucose AFP + 3 more
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UKAS 9734 Wexham, GB
Staphylococcus aureus MRSA Enterobacteriaceae Staphylococcus aureus (MRSA) Red Blood Cells + 3 more
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UKAS 9718 Chertsey, GB
Tryptase CD4 Detection of the following: | Special St Antibodies: | Adrenal Lymphocyte Subsets: | BD reagent + 3 more
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UKAS 9732 Frimley, GB
Ethanol Digoxin HbA1c CA 15-3 CA 19-9 + 3 more
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UKAS 9726 Lyne, GB
Measurement Demonstration of: | Operation and Mainte Samples | T5000 Samples | CYT-BSPS-SOP-001 SOP Samples | Gynaecological Specimen + 3 more
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UKAS 9733 Wexham, GB
Ethanol Digoxin Cortisol Glucose AFP + 3 more
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Fugro GB

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UKAS 0919 Wallingford, GB
DIN EN ISO 17892-1 DIN EN ISO 17892-3 DIN EN ISO 17892-4 DIN EN ISO 17892-11 DIN EN ISO 17892-2 + 3 more
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UKAS 10287 Chelmsford, GB
(HSG 264, 2012)
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UKAS 0580 Bexhill, GB
FLOW TEMPERATURE DC VOLTAGE DC CURRENT Gas pressure (absolute) + 3 more
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UKAS 2083 Wellington, GB
(HSG 264, 2012) Asbestos: The Analysts' Guide (HSG 248) (HSG 248) – 2021 (PCM) based on HSG 248 M4 based on HSG 248 + 1 more
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G&M Procter

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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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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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