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
3,963 Accredited labs
21 Countries

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ACCREDIA 00708 Arezzo, IT
ISO 21527-1 ISO 21527-2 DIN EN ISO 4833-1 DIN EN ISO 6579-1 DIN EN ISO 21528-2 + 3 more
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COFRAC 1-1747 Casablanca, FR
(p.Ala222Val); dbSNP rs1801133 ISO 3656 DIN EN 1135 BS EN 15662 DIN 10113-2 + 3 more
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COFRAC 1-0871 Coulounieix-Chamiers, FR
DIN EN 27888 ISO 4831 ISO 4832 ISO 15214 ISO 21527-1 + 3 more
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COFRAC 1-0551 Laon, FR
ISO DIN EN 27888 ISO 4832 ISO 15213 ISO 15214 + 3 more
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COFRAC 1-6954 Pardies, FR
DIN EN 13126-19 DIN EN 14790 DIN EN 14792 DIN EN ISO 21877 DIN EN 14789 + 3 more
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COFRAC 1-6923 Papeete, FR
NF X 43-050 NF X 43-269 ISO 16000-7 FD X 46-033
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COFRAC 1-1046 Les Ponts De Ce, FR
ISO DIN EN 27888 ISO 4832 ISO 15214 DIN ISO 16649-2 + 3 more
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COFRAC 1-1105 Serres-Castet, FR
Charpy impact test (ISO 148-1) ISO DIN EN ISO 4136 DIN EN ISO 9016 DIN EN ISO 6506-1 + 3 more
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COFRAC 1-6990 La Ciotat, FR
DIN EN ISO 16212 DIN EN ISO 18415 DIN EN ISO 18416 DIN EN ISO 21149 DIN EN ISO 21150 + 3 more
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COFRAC 1-1979 Limoges, FR
ISO 18787 ISO 15214 ISO 21527-1 ISO 21527-2 DIN EN ISO 6579-1 + 3 more
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COFRAC 1-0621 Casablanca, FR
DIN EN 60068-2-75 IEC 60335-1: 2010 IEC 60884-1: 2002 IEC 60884-2-5: 1995 IEC 60947-2 + 3 more
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COFRAC 1-2453 Arques, FR
ASTM C927-80 ASTM E 308 ASTM C738-94 ISO 6486-1 et -2 ISO 24117 + 2 more
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COFRAC 1-10085 Arques, FR
ASTM C927-80 ASTM C738-94 ISO 6486-1 et -2 ISO 7086-1 et 2 NF EN 1388-1 et 2
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COFRAC 1-1847 Lyon 7Eme, FR
Tensile testing of metallic materials (I Charpy impact test (ISO 148-1) Salt spray / neutral salt fog test (ISO ISO (NM_001718: c.1-c.500) + 3 more
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ENAC LE309 Cabrils, ES
ISO 16649-2 ISO 21528-2 ISO 6579-1 ISO 6222 ISO 660 + 3 more
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ACCREDIA 00521 Pinerolo, IT
ISO 21527-2 DIN ISO 16649-2 DIN EN ISO 4833-1 DIN EN ISO 6579-1 DIN EN ISO 7932 + 3 more
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ENAC LE462 Montmeló, ES
ASTM D 1293 ASTM D 240 ASTM D56 ASTM E 203 ISO 6439 + 3 more
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ACCREDIA 00585 Vicenza, IT
ISO 18787 ISO 4832 ISO 15214 ISO 21527-1 ISO 21527-2 + 3 more
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ACCREDIA 00496 San Paolo, IT
dbSNP rs1800562, rs1799945, rs1800730, r DIN EN 27888 ISO 18787 ISO 4831 ISO 4832 + 3 more
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ACCREDIA 00484 Pavullo nel Frignano, IT
DIN ISO 16649-2 DIN EN ISO 6579-1 DIN EN ISO 6888-2 DIN EN ISO 11290-1 ISO 22196 + 3 more
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ENAC LE416 Burgos, ES
ISO 16869 UNE-EN 15604 UNE-EN 15475 UNE-EN 15958 UNE-EN 15956 + 3 more
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ENAC LE609 Abegondo, ES
ISO 10390 ISO 8968-1 BS ISO 6731:2010 ISO 23318 UNE 77308 + 3 more
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ENAC LE1502 El Palmar, ES
ISO 4833-1 BS ISO 6731:2010 ISO 23318 UNE-EN ISO 6579-1 UNE-EN 15621 + 3 more
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ENAC LE503 Jerez de la Frontera, ES
UNE 33129 OIV-MA-AS312-01 OIV-MA-AS2-01 OIV-MA-BS-06 OIV-MA-AS323-04A2 + 3 more
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ENAC LE508 Montilla, ES
OIV-MA-AS312-01 OIV-MA-AS2-01 OIV-MA-AS2-03B OIV-MA-AS313-15 OIV-MA-AS323-04A2 + 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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