SIST EN 14811:2019

Railway applications - Track - Special purpose rail - Grooved rails and associated construction profiles

This document specifies requirements for grooved rails and associated construction rail profiles for grooved rail facilities with a linear mass of 42 kg/m and upwards for use in tram transport systems.
NOTE   Grooved rails are also used for harbour and industrial tracks.
Five pearlitic steel grades are specified in a hardness range between 200 HBW and 390 HBW. The rails are either non-heat-treated or heat-treated and are made from non-alloyed (C-Mn) steel in both cases.
This document specifies 26 specific grooved rail profiles and 7 specific construction rail profiles. The grooved rail profiles can also be used as construction elements in switches and crossings.
Two grooved rail classes are specified differing in requirements for profile tolerances.

Bahnanwendungen - Oberbau - Spezialschienen - Rillenschienen und zugehörige Konstruktionsprofile

Dieses Dokument legt Anforderungen für Rillenschienen und zugehörige Konstruktionsprofile für Rillenschienen-Anlagen mit einer längenbezogenen Masse ab 42 kg/m für die Anwendung im Straßenbahnverkehr fest.
ANMERKUNG   Rillenschienen werden auch für Hafen- und Industriegleise verwendet.
Fünf perlitische Stahlsorten in einem Härtebereich zwischen 200 HBW und 390 HBW sind festgelegt. Die Schienen sind entweder nicht wärmebehandelt oder wärmebehandelt und bestehen in beiden Fällen aus unlegiertem (C-Mn)-Stahl.
In diesem Dokument sind 26 Rillenschienenprofile und 7 Konstruktionsprofile festgelegt. Die Rillenschienenprofile können ebenso als Konstruktionselemente in Weichen und Kreuzungen verwendet werden.
Zwei Rillenschienenklassen sind festgelegt, die sich hinsichtlich der Anforderungen an die Profiltoleranzen unterscheiden.

Application ferroviaires - Voie - Rails speciaux - Rails à gorge et profils de construction associés

Le présent document spécifie des exigences pour les rails à gorge et profils de construction associés pour les aiguillages et les croisements à rails à gorge d’une masse linéaire supérieure ou égale à 42 kg/m destinés à l’usage dans les systèmes de tramways.
NOTE   Les rails à gorge sont aussi utilisés dans les voies des ports et des industries.
Cinq nuances d’acier perlitiques sont spécifiées représentant une plage de dureté comprise entre 200 HBW et 390 HBW. Les rails sont non traités ou traités thermiquement et sont dans les deux cas en acier non allié (C-Mn).
Ce document définit 26 profils de rails à gorge et 7 profils de construction spécifiques. Les profils de rails à gorge peuvent aussi être utilisés comme éléments de construction dans les aiguillages et les croisements.
Deux classes de tolérances des profils de rails à gorge sont spécifiées.

Železniške naprave - Zgornji ustroj proge - Specialne tirnice - Tirnice z žlebom in elementi za kretnice in križišča

Ta evropski standard določa zahteve za tirnice z žlebom ter povezane elemente za kretnice in križišča za objekte s tirnicami z žlebom z linearno maso 42 kg/m ali več za uporabo pri tramvajskih transportnih sistemih.
OPOMBA:   Tirnice z žlebom se uporabljajo tudi za tire v pristaniščih in industrijske tire.
Določenih je šest perlitnih razredov jekla z razponom trdote 200–390 HBW. Tiri so ali niso toplotno obdelani in so v obeh primerih izdelani iz nelegiranega jekla (C-Mn).
Ta standard določa 18 posebnih profilov tirnic z žlebom in 7 posebnih profilov elementov za kretnice in križišča. Profile tirnic z žlebom je mogoče uporabiti tudi kot konstrukcijske elemente pri kretnicah in križiščih.
Določena sta dva razreda tirnic z žlebom, ki se razlikujeta glede zahtev v zvezi z odstopanji profilov.

General Information

• Status: Published
• Public Enquiry End Date: 30-Sep-2016
• Publication Date: 01-Apr-2019
• ICS: 45.080 - Rails and railway components
• ICS: 93.100 - Construction of railways
• Technical Committee: IŽNP - Reilway applications
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 28-Mar-2019
• Due Date: 02-Jun-2019
• Completion Date: 02-Apr-2019
• Directive: 2008/57/EC - Directive 2008/57/EC of the European Parliament and of the Council of 17 June 2008 on the interoperability of the rail system within the Community (Recast)
• Mandate: M/024 - Mandate to CEN/CENELEC/ETSI for programming and standardization in the field of railway equipment
• Mandate: M/483 - Mandate for programming and standardisation addressed to the European standardisation bodies under directive 2008/57/EC in the field of the interoperability of the rail system within the European Union
• Ref Project: EN 14811:2019 - Railway applications - Track - Special purpose rail - Grooved rails and associated construction profiles

Relations

• Replaces: SIST EN 14811:2007+A1:2010 - Railway applications - Track - Special purpose rail - Grooved and associated construction
• Effective Date: 27-Mar-2019
• Revised: SIST EN 14811:2007+A1:2010 - Railway applications - Track - Special purpose rail - Grooved and associated construction
• Effective Date: 21-Dec-2011

Overview

SIST EN 14811:2019 is the European standard for special purpose grooved rails and associated construction rail profiles used primarily in tram transport systems. It specifies technical requirements for grooved rail facilities with a linear mass of 42 kg/m and upwards. The document covers material grades, dimensional profiles, manufacturing controls, marking and acceptance testing to ensure safety and long-term performance of grooved-rail track systems. (Note: grooved rails are also commonly used in harbour and industrial tracks.)

Key topics and technical requirements

• Scope and profiles
  • Defines 26 grooved rail profiles and 7 construction rail profiles; grooved profiles may be used in switches and crossings.
  • Two grooved rail classes are specified with different profile tolerance requirements.
• Materials
  • Five pearlitic steel grades specified, with hardness range 200 HBW to 390 HBW.
  • Rails are manufactured from non-alloyed (C–Mn) steel, available as non-heat-treated or heat-treated products.
• Manufacture and quality
  • Emphasis on product integrity and factory production control; manufacturers are expected to operate a quality management system consistent with EN ISO 9001.
  • Requirements on blooms, rolling, marking (rolling marks, hot stamping) and identification.
• Acceptance tests and inspection
  • Laboratory tests include chemical composition, hydrogen determination, Brinell hardness (HBW) and tensile testing.
  • Dimensional and straightness tolerances, cutting and drilling, gauges and surface imperfection criteria are specified.
  • Procedures for proving, dressing and retesting defects are provided.
• Performance-based approach
  • Standard focuses on relevant performance and inspection criteria rather than prescribing specific manufacturing methods, while referencing best-practice processes where needed.

Practical applications and users

Who uses EN 14811:2019:

• Tramway infrastructure designers and specifiers
• Urban rail and light-rail operators and procurement teams
• Rail manufacturers and profile rolling mills
• Track construction and maintenance contractors
• Harbor and industrial track planners using grooved rails

Practical benefits:

• Ensures compatibility and interchangeability of grooved rail components
• Reduces procurement risk by standardizing material grades and acceptance testing
• Improves safety and lifecycle performance of tram and special-purpose tracks

Related standards

Relevant European standards referenced in the foreword and normative clauses include:

• EN 13674 (Rails - Vignole and related rails)
• EN ISO 6506-1 (Brinell hardness test)
• EN ISO 6892-1 (Tensile testing)
• EN 14587 series, EN 14730 series (rail welding standards)
• EN 15594, EN 16273, EN 16725, EN 16771 (rail restoration, transitions, crossings)

Keywords: EN 14811:2019, grooved rails, tram transport systems, special purpose rail, construction rail profiles, pearlitic steel, hardness HBW, rail standards, rail manufacturing, acceptance tests, track infrastructure.

Standards Content (Sample)

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Bahnanwendungen - Oberbau - Spezialschienen - Rillenschienen und zugehörige KonstruktionsprofileApplication ferroviaires - Voie - Rails speciaux - Rails à gorge et profils de construction associésRailway applications - Track - Special purpose rail - Grooved rails and associated construction profiles93.100Gradnja železnicConstruction of railways45.080Rails and railway componentsICS:Ta slovenski standard je istoveten z:EN 14811:2019SIST EN 14811:2019en,fr,de01-maj-2019SIST EN 14811:2019SLOVENSKI
STANDARDSIST EN 14811:2007+A1:20101DGRPHãþD

EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
EN 14811
March
t r s { ICS
{ uä s r r Supersedes EN
s v z s sã t r r x ªA sã t r r {English Version
Railway applications æ Track æ Special purpose rail æ Grooved rails and associated construction profiles Applications ferroviaires æ Voie æ Rails spéciaux æ Rails à gorge et profils de construction associés
Bahnanwendungen æ Oberbau æ Spezialschienen æ Rillenschienen und zugehörige Konstruktionsprofile This European Standard was approved by CEN on
s v December
t r s zä
egulations which stipulate the conditions for giving this European Standard the status of a national standard without any alterationä Upætoædate lists and bibliographical references concerning such national standards may be obtained on application to the CENæCENELEC Management Centre or to any CEN memberä
translation under the responsibility of a CEN member into its own language and notified to the CENæCENELEC Management Centre has the same status as the official versionsä
CEN members are the national standards bodies of Austriaá Belgiumá Bulgariaá Croatiaá Cyprusá Czech Republicá Denmarká Estoniaá Finlandá Former Yugoslav Republic of Macedoniaá Franceá Germanyá Greeceá Hungaryá Icelandá Irelandá Italyá Latviaá Lithuaniaá Luxembourgá Maltaá Netherlandsá Norwayá Polandá Portugalá Romaniaá Serbiaá Slovakiaá Sloveniaá Spainá Swedená Switzerlandá Turkey and United Kingdomä
EUROPEAN COMMITTEE FOR STANDARDIZATION COMITÉ EUROPÉEN DE NORMALISATION EUROPÄISCHES KOMITEE FÜR NORMUNG
CEN-CENELEC Management Centre:
Rue de la Science 23,
B-1040 Brussels
t r s { CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Membersä Refä Noä EN
s v z s sã t r s { ESIST EN 14811:2019

Grooved rail profiles and associated construction rail profiles . 26 Annex B (normative)
Gauges . 79 SIST EN 14811:2019

Holes in grooved rails . 98 Annex D (informative)
Electric conductivity of the rails . 100 Bibliography . 101
IEC Electropedia: available at http://www.electropedia.org/
ISO Online browsing platform: available at http://www.iso.org/obp
3.1 heat liquid steel melt tapped out of a converter or electric arc furnace which after continuous casting includes a given number of blooms relating to the weight of the heat and the extent of the mixing zone Note 1 to entry: In the case of sequence casting, the blooms belonging to the mixing zone will be clearly defined. 3.2 sequence number of heats of the same steel grade which undergo continuous casting in a new or repaired tundish Note 1 to entry: Tundishes can be used in parallel if the caster has many strands. 3.3 heat-treated rail rail that has undergone accelerated cooling from austenitizing temperature during the metallurgical transformation period SIST EN 14811:2019

R260 1.0623 260 to 300 Non-alloyed (C-Mn)-steel
R290GHT 1.0637 290 to 330 Non-alloyed (C-Mn)-steel, head- hardened
R340GHT 1.0638 340 to 390 Non-alloyed (C-Mn)-steel, head- hardened
a See Tables 3 and 4 for the chemical composition and the mechanical properties. 6 Dimensions, static properties, linear mass and tolerances The requirements for the profile drawings, their dimensions, static properties and linear mass are given in Annex A. The tolerances of certain dimensions shall be as given in Tables 6 and 7. All other quantities are informative only. NOTE Linear masses have been calculated based on a density of steel of 7,85 kg/dm3. 7 Manufacture 7.1 Product integrity 7.1.1 Factory production control All grooved rails and associated construction rail profiles shall be produced under a comprehensive system of production control in order to ensure confidence in the conformity of the finished product. The system shall address this document to ensure that the finished products consistently comply with requirements to achieve the product integrity necessary to provide assurance of product safety in track. The manufacturer shall demonstrate by documented evidence continuing compliance with the factory production control system required. Manufacturers having a factory production control system such as EN ISO 9001 shall be recognized as satisfying the minimum requirements specified by this clause. 7.1.2 Best practice manufacture The product shall be manufactured to the best practices as defined in 7.1.1. NOTE This is to ensure that the rail attributes, described in the introduction, which are not known in an exact manner or are not practically measurable, achieve the required high level of product integrity in track. SIST EN 14811:2019

in mm 52R1, 56R1, 61C1 68 51R1, 53R1 53 59R1, 59R2, 60R1, 60R2, 73C1, 75C1 78 55R1, 57R1, 67R1 63 62R1, 62R2 78 53G1, 54G1, 54G2, 54G3, 54G4, 55G1, 55G2, 55G3 55 46G1 52 68G1 71 60R3, 63R1 81 105C1 65 7.4.2 Hot stamping Each rail shall be identified by a stamped mark consisting of a numerical and/or alphabetical code. The code shall allow the following information to be identified: — the number of the heat from which the rail has been rolled; — the number of the strand and the position of the bloom within this strand; — the position of the rail in the bloom (A, B…. Y). The identification mark of the rail shall be stamped at least once by the manufacturer on one of the two sides of the web of the hot-rolled rail. The figures and letters shall be clearly legible and 16 mm high. The stamped characters shall have a flat or radius (1 mm to 1,5 mm radius) face with bevels at the side. The marks shall be on a 10° angle from the vertical and shall have rounded corners. The stamping shall be not greater than 1,0 mm deep along the centre of the web. The design of the characters shall be as shown in Figure 2. If the rail does not have any stamped mark, it shall be identified by means of a code made by rotary burr. NOTE Subsequent cutting of the rails can result in more than one rail having the same identity. 7.4.3 Other identification At the request of the purchaser, the rails can be marked with paint. The colour and position of these paint marks shall be specified by the purchaser. 7.4.4 Exceptions The requirements of 7.4.1 and 7.4.2 do not apply to construction rail profiles 310C1, 338C1 or 42C1. SIST EN 14811:2019

Liquid 0,62 to 0,80 0,15 to 0,58 0,70 to 1,20 0,025 0,025 2,5 880 10 260 to 300 Solid 0,60 to 0,82 0,13 to 0,60 0,65 to 1,25 0,030 0,030 2,5 R290GHT Liquid 0,50 to 0,65 0,15 to 0,58 1,00 to 1,25 0,025 0,025 2,5 960b 10 290 to 330b Solid 0,48 to 0,67 0,13 to 0,60 0,95 to 1,30 0,030 0,030 2,5 R340GHT Liquid 0,62 to 0,80 0,15 to 0,58 0,70 to 1,20 0,025 0,025 2,5 1175 9 340 to 390 Solid 0,60 to 0,82 0,13 to 0,60 0,65 to 1,25 0,030 0,030 2,5 a The limiting values for elongation after fracture do not apply for heavy construction rails 310C1 and 338C1. b For the profiles 73C1 and 105C1, the minimum requirement for the tensile strength of is 940 MPa, and the hardness limits are 280–320 BHN. Table 4 — Maximum residual elements content in % by mass Cr Mo Al Cu Cu + 10Sn Cr + Mo + Ni + Cu + V 0,15 0,02 0,004 0,15 0,35 0,35
R290GHTa R340GHT Running surface 200 to 240 220 to 260 260 to 300
290 to 330 340 to 390 1
> 290 > 340 2
> 270 > 300 a For the profiles 73C1 and 105C1, the requirements for the hardness are 280–320 BHN for the running surface and min. 280 BHN for point 1. 8.1.5 Tensile test It can be agreed between purchaser and manufacturer that values can be taken from a regression calculation, which establishes a relationship between the chemical composition and the tensile strength. The tensile test pieces shall be taken as shown in Figure 4 a). For the heavy construction rails 310C1 and 338C1, the tensile test piece shall be taken as shown in Figure 4 b). For the other construction rails, the test piece shall be taken from the cross-section 10 mm below the running surface. The manufacturer shall determine the tensile properties in accordance with EN ISO 6892-1 using round test pieces of the following dimensions: — diameter of 10 mm; — original cross-sectional area of 78,5 mm2; — original gauge length of 50 mm; — test length of 55 mm. 8.1.6 Retests If any test fails to meet the requirements of 8.1.2 to 8.1.5 (but excluding hydrogen), then two further tests shall be performed on samples from two other rails from the same heat. If these two tests are successful, the rails from the heat are accepted. For hydrogen testing, see 8.1.3. 8.2 Dimensional and straightness tolerances 8.2.1 Profile The nominal dimensions of the grooved rail or construction rail profile (see Annex A) and the actual dimensions anywhere on the rail shall not differ by more than the values given in Tables 6 and 7. The web thickness shall be measured in the middle of the web. SIST EN 14811:2019

R-group G-group Gauge- drawing No. Height of rail a ±1,5 ±1,5 B.1, B.2 Width of groove ±1 ±1 B.3 Depth of groove ±1 ±1 B.4 Height difference between running surface and top edge of grooved head ±2 b + 2 - 0,5 B.5 Width of rail head ±1 ±1 B.6 Width of grooved head ±2 ±1 B.7 Width of foot + 1 c - 3 ±1,5 d B.8 Web thickness + 1 - 0,5 + 1 - 0,5 B.9 Web and running edge offset ±3 e ±1 f B.10 Foot and running edge offset ±3 g ±1 h B.11, B.12 Running edge radius ±1 ±1 B.13 Radius on the outside of the rail head ±3 - B.14 Radii at grooved head Figure 6 -
Radii at outside of foot Figure 6 -
Height of fishing surface ±1,5 i ±0,9 B.17 Base concavity + 1 0 + 0,5 0
Twist over rail length max. 3 max. 3
Web-foot squareness ±1,5° ±1,0° B.18 a The height of the rail is measured from the foot supporting surface to the highest point of the rail head. b For 57R1 and 67R1: ± 3 mm; for 62R1 and 62R2: - 0,5 mm/+ 2 mm. c For 60R3 and 63R1: foot width with no tolerance, 1/2 width of foot - 5 mm/+ 3 mm. d For 46G1 and 68G1: ± 4 mm but 1/2 width of foot ± 2 mm. e Tolerances of ± 2 mm can be specified if agreed between the purchaser and manufacturer. f This tolerance applies only to 46G1 and 68G1. g These tolerances apply to 90 % of deliveries but for 10 % ± 4 mm is permitted. Not measured for 60Ri3 or 63Ri1. h This tolerance only applies to 53G1, 54G1, 54G2, 54G3, 54G4, 55G1, 55G2 and 55G3, and is measured at least 1 m from the end. These tolerances shall not be greater than ± 1 mm for 90 % of the deliveries and for 10 % - 2 mm/+ 1 mm is permitted. i If agreed between the purchaser and manufacturer, these tolerances can be reduced to ± 1 mm for 62Ri1 and 62Ri2. SIST EN 14811:2019

42C1 61C1 73C1 75C1 105C1 310C1 338C1 Height of rail a ±0,5 ±1,5 ±1,5 ±1,5 ±1,5 ±2 + 2,5 - 1,5 Head thickness - - - - - ±1,5 - Width of rail head + 1 0 ±1 - ±1 - - - Width of grooved rail - ±2 - ±2 - - - Width of head in grooveless construction rail profiles - - ±2 - ±1 ±3 ±2 Width of foot + 1 0 + 1 - 3 + 1 - 3 + 2 - 8 + 1 - 3 ±3 ±3 Foot thickness - - - - - - + 3 - 1,5 Web thickness
+ 1 - 0,5 ±1 + 1 - 0,5 ±1 ±3 - Width of groove - ±1 - ±1 - - - Depth of groove + 0,6 - 0,3 ±1 - ±1 - - - Height difference between running surface and top edge of grooved head - ±2 - ±2 - - - Offset web and running edge - ±2 - - - - - Offset foot and running edge - ±3 - ±5 - - - Web-foot squareness - ±1,5° ±1,5° - ±1,5° - - Running edge radius ±1 ±1 - ±1 - - - Radius on the outside of the rail head ±3 ±3 + 7 - 3 ±3 ±3 +5 3 - Radii at grooved head - Figure 6 ±5 Figure 6 - - - Radii at outside of the foot - Figure 6 - Figure 6 Figure 6 +5 3 - Height of fishing surface - ±1,5 ±1,5 ±1,5 - - - Base concavity + 0,3 0 + 1 0 + 1 0 + 1 0 + 1 0 - - Twist over rail length - max. 3 max. 3 max. 3 max. 3 max. 5 a max. 2,5 over 5 m Flatness of foot and head - - - - - - b Distance between running surface/top of friction plate support - - - 0 3 - - - Head contour + 0,6 - 0,3 - - - - - - SIST EN 14811:2019

42C1 61C1 73C1 75C1 105C1 310C1 338C1 Overall width + 1 0 - - - - - - a Applies for delivered lengths greater than 5 m. b Less than 1,5 mm over 2 m length and less than 2,5 mm over 4 m length. 8.2.2 Straightness and twist 8.2.2.1 Straightness of the ends The straightness of the ends of the rails shall be checked with a 1,5 m long steel straight edge. Within this length, deviations from straightness of not more than 1 mm are allowed in the vertical and horizontal directions. The deviation in the vertical direction is only allowed if the end of the rail has a continuous upsweep. Other measurement techniques can be used. 8.2.2.2 Straightness of the rails In the vertical direction, the end of the rail shall have an upsweep or downsweep of not more than 10 mm when the rail is free-standing on its foot on a suitable support. The horizontal straightness between the ends of the rails shall be checked with the naked eye. If one rail appears to bend too much in this assessment, it shall be examined. The minimum tolerable radius is R = 800 m. 8.2.2.3 Straightness requirements for construction rails The requirements given in 8.2.2.1 and 8.2.2.2 also apply to construction rails except for block rails 310C1 and 338C1. The following requirements apply to them: The horizontal and vertical curvature between the ends of the rails shall be checked with the naked eye. If one rail appears to bend too much in this assessment, it shall be examined. The horizontal and vertical bend of the rail between the ends of the rails shall not exceed 1 mm/m length of the rail. The end straightness and the straightness between the ends of the rails shall be checked with a 1,5 m long steel straight edge. Within this length, deviations from straightness of not more than 2 mm are allowed in the vertical and horizontal directions. 8.2.2.4 Twist measurement The requirements of Tables 6 and 7 apply. The rail shall be tested standing on its foot on a suitable low-friction inspection bed. The twist shall be measured by inserting feeler gauges or other suitable measuring instruments between the base of the rail and the rail skid nearest the rail end (Figure 5). Other appropriate measurement methods can be used. 8.2.3 Cutting and drilling The size and location of the drilled holes, the squareness of the rail ends and the rail lengths shall be within the tolerances given in Table 8 (see also Annex C). The specified rail lengths are at + 15 °C. If measurements are taken at other temperatures, they shall be corrected to take into account expansion or contraction of the rail. SIST EN 14811:2019

Gauge drawing No. Length of rail for undrilled grooved rails a ±6
Length of rail for grooved rails with tie bar holes ±3
Length of rail for grooved rails with fishplate holes, but without tie bar holes ±4
Squareness of the rail ends H and V a 1
Diameter of fishplate holes ±0,5 B.19 Diameter of tie bar holes ±1 B.20 Distance from base of foot in the case of fishplate holes ±1 B.21 Distance from base of foot in the case of tie bar holes ±2 B.21 Distance from end of rail in the case of fishplate holes ±1 B.19 Distance from end of rail in the case of tie bar holes ±5
Distance between holes in the case of pairs of tie bar holes with a distance between holes equal or larger than 100 mm ±1 B.22 with a distance between holes of less than 100 mm ±3 B.22 a Construction rails 310C1 and 338C1: length of rail ± 10 mm, squareness without tolerance 8.2.4 Gauges The gauges required for manufacture are shown in Annex B. Other measurement techniques than those given in Annex B can be used; however, in cases of dispute, only those in Annex B shall be used. 8.3 Surface imperfections 8.3.1 General The requirements of 8.3.2 to 8.3.4 apply, except for the construction rail profiles 310C1 and 338C1. For these, an imperfection depth of 2 mm is allowed on the head surface and 4 mm for the rest of the surface. The frequency of the imperfections in the foot shall not impair the function of the bearing surface. Surface imperfections (for definitions, see EN 10163-1) can be checked by a representative of the purchaser using an appropriate device; this shall not be considered as damage of the rail. Dressing can be agreed upon between the manufacturer and the purchaser (see also 8.5). 8.3.2 Protrusions Protrusions on the running surface and the underside of the foot shall be dressed. The areas affected by bending rollers, tie rods and fastening elements shall be dressed smooth. Over the rest of the surface, protrusions up to a maximum height of 1,5 mm are allowed or shall be dressed to a height of not more than 1,5 mm. Rolling marks are not regarded as protrusions within the meaning of a surface imperfection. SIST EN 14811:2019

over 0,5 mm correction is not allowed — foot, principally transverse: maximum of 0,3 mm on underside of the foot,
maximum of 0,5 mm on the topside of the foot — web, principally transverse: maximum of 0,3 mm
principally longitudinal: maximum of 0,5 m 8.3.4 Depressions in the running surface Imperfections in the running surface shall not exceed a depth of 0,35 mm. Principally longitudinal imperfections shall be a maximum of 2 mm wide, principally transverse
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