Bsi bs en 12503 4 2016

BS EN 12503-4:2016 BSI Standards Publication Sports mats Part 4: Determination of shock absorption BS EN 12503-4:2016 BRITISH STANDARD National foreword This British Standard is the UK implementation of EN 12503-4:2016 It supersedes BS EN 12503-4:2013 which is withdrawn The UK participation in its preparation was entrusted to Technical Committee SW/136/22, Sports, Playground and other Recreational Equipment - Gymnasium and Playing Field Equipment A list of organizations represented on this committee can be obtained on request to its secretary This publication does not purport to include all the necessary provisions of a contract Users are responsible for its correct application © The British Standards Institution 2016 Published by BSI Standards Limited 2016 ISBN 978 580 89112 ICS 97.220.30 Compliance with a British Standard cannot confer immunity from legal obligations This British Standard was published under the authority of the Standards Policy and Strategy Committee on 30 June 2016 Amendments/corrigenda issued since publication Date Text affected EUROPEAN STANDARD BS EN 12503-4:2016 NORME EUROPÉENNE EUROPÄISCHE NORM EN 12503-4 ICS 97.220.30 May 2016 Supersedes EN 12503-4:2013 English Version Sports mats - Part 4: Determination of shock absorption Tapis de sport - Partie 4: Détermination des Sportmatten - Teil 4: Bestimmung der caractéristiques d'amortissement au choc Dämpfungseigenschaften This European Standard was approved by CEN on 25 March 2016 CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN member This European Standard exists in three official versions (English, French, German) A version in any other language made by translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management Centre has the same status as the official versions CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom EUROPEAN COMMITTEE FOR STANDARDIZATION COMITÉ EUROPÉEN DE NORMALISATION EUROPÄISCHES KOMITEE FÜR NORMUNG CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels © 2016 CEN All rights of exploitation in any form and by any means reserved Ref No EN 12503-4:2016 E worldwide for CEN national Members BS EN 12503-4:2016 EN 12503-4:2016 (E) Contents Page European foreword Scope Normative references Principle 4 Apparatus 4.1 Indentors 4.2 Release mechanism 4.3 Accelerometer 4.4 Data capture and processing 4.5 Thickness measurement Test piece 6 Conditioning and test temperature 7 Procedure 7.1 Procedure A (types to 11) 7.2 Procedure B (type 12) 10 7.2.1 Homogeneity test 10 7.2.2 Shock absorption test 11 Expression of results 12 8.1 Procedure A 12 8.2 Procedure B 12 8.2.1 Homogeneity test 12 8.2.2 Shock absorption test 12 Test report 12 Bibliography 13 BS EN 12503-4:2016 EN 12503-4:2016 (E) European foreword This document (EN 12503-4:2016) has been prepared by Technical Committee CEN/TC 136 “Sports, playground and other recreational facilities and equipment”, the secretariat of which is held by DIN This European Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by November 2016, and conflicting national standards shall be withdrawn at the latest by November 2016 Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights CEN [and/or CENELEC] shall not be held responsible for identifying any or all such patent rights This document supersedes EN 12503-4:2013 In relation to EN 12503-4:2013, the following main changes have been made: a) Normative references updated; b) Requirement and test method for high-jump and pole vault mats precised (Type 9, 10 and 11) EN 12503, Sports mats consists of the following parts: — Part 1: Gymnastic mats, safety requirements — Part 2: Pole vault and high jump mats, safety requirements — Part 3: Judo mats, safety requirements — Part 4: Determination of shock absorption — Part 5: Determination of the base friction — Part 6: Determination of the top friction — Part 7: Determination of static stiffness According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom BS EN 12503-4:2016 EN 12503-4:2016 (E) Scope This European Standard specifies a method of test for the determination of shock absorption characteristics of sports mats types to of EN 12503-1:2013, to 11 of EN 12503-2:2016 and 12 of EN 12503-3:2001 Normative references The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application For dated references, only the edition cited applies For undated references, the latest edition of the referenced document (including any amendments) applies EN 12390-3, Testing hardened concrete — Part 3: Compressive strength of test specimens ISO 6487, Road vehicles — Measurement techniques in impact tests — Instrumentation Principle An indentor is dropped onto the top surface of the mat and the deceleration during the impact monitored The deceleration profile is processed to yield specified shock absorption parameters Apparatus 4.1 Indentors Metal indentors in accordance with the essential dimensions and masses are given in Table and Figure and Figure Table — Indentors Type of mat Diameter Mass mm kg 150 ± 0,5 10 ± 0,1 150 ± 0,5 10 ± 0,1 150 ± 0,5 10 ± 0,1 150 ± 0,5 20 ± 0,2 150 ± 0,5 20 ± 0,2 150 ± 0,5 20 ± 0,2 150 ± 0,5 30 ± 0,3 150 ± 0,5 30 ± 0,3 10 150 ± 0,5 30 ± 0,3 11 150 ± 0,5 30 ± 0,3 150 ± 0,5 30 ± 0,3 12 43 ± 0,2 78 ± 0,2 ± 0,05 116 ± 0,2 BS EN 12503-4:2016 EN 12503-4:2016 (E) Dimensions in millimetres Key additional mass (10 ± 0,1) kg additional mass (10 ± 0,1) kg cable port mass (10 ± 0,1) kg space for accelerometer SR spherical radius Figure — Indentors BS EN 12503-4:2016 EN 12503-4:2016 (E) Dimensions in millimetres Key accelerometer d diameter (see Table 1) SR spherical radius Figure — Indentors for judo mats 4.2 Release mechanism Means of releasing the indentor to permit it to fall smoothly, vertically 4.3 Accelerometer An accelerometer rigidly mounted on the indentor as indicated in Figure and Figure 4.4 Data capture and processing Instrumentation to record, display and process the accelerometer signals to produce the required shock absorption parameters, having a channel frequency class, including the accelerometer, of 000 in accordance with ISO 6487and sampling frequency of not less than 10 kHz 4.5 Thickness measurement Means of measuring the thickness of the mat to an accuracy of (± 5) mm (for types to 11) Test piece 5.1 For mats type to and type 12 the test piece is a whole mat laid on a smooth, solid concrete floor measuring at least m × m For mats of type to 11 the test piece is a complete mat ready for use The mat may be supported on a raised platform in use, but this not part of test specified in this standard 5.2 For mats type to and type 12 the laboratory test floor shall be fully supported concrete (i.e not a suspended floor) with a minimum thickness of 100 mm The compressive strength of the concrete shall be not less than 40 MPa when tested in accordance with EN 12390-3 BS EN 12503-4:2016 EN 12503-4:2016 (E) Mats of type to 11 can be tested on their designated ground The mat may be supported on a raised platform in use, but this not part of test specified in this standard Conditioning and test temperature Condition the test piece for a minimum of 24 h at (21 ± 3) °C immediately before the test and carry out the test at the same temperature Procedure 7.1 Procedure A (types to 11) Carry out tests on mats types to at the eight locations indicated in Figure Dimensions in centimetres Figure — Procedure A (types to 8) – Test location and number of tests Carry out tests on mats types and 10 at the eight locations indicated in Figure BS EN 12503-4:2016 EN 12503-4:2016 (E) Dimensions in centimetres Key a length of the mat b width of the mat Figure — Procedure A (types and 10) – Test location and number of tests Carry out tests on mats types 11 at the eight locations indicated in Figure BS EN 12503-4:2016 EN 12503-4:2016 (E) Dimensions in centimetres Key a width of the mat b length of the mat to test location Figure — Procedure A (type 11) - Test location and number of tests The fall height shall be as detailed in Table Dimensions in millimetres Table — Test fall heights Fall height Type of mat 150 ± 1,0 300 ± 1,0 400 ± 1,0 800 ± 1,0 800 ± 1,0 800 ± 1,0 800 ± 1,0 800 ± 1,0 200 ± 1,0 200 ± 1,0 10 200 ± 1,0 800 ± 1,0 11 (measurement point according to Figure 5) 11 (measurement point according to Figure 5) BS EN 12503-4:2016 EN 12503-4:2016 (E) For tests on types and mats, a metal frame with dimensions of 450 mm × 350 mm and a minimum mass of 5,0 kg shall be placed centrally on the test piece during the tests to ensure that the test piece is flat For tests on types 9, 10, 11 mats, determine the thickness of the mat (without under construction) centrally along each side and calculate the mean thickness Raise the indentor to the required height and lock into position Release the indentor and allow it to fall vertically onto the test piece Record the signal from the accelerometer throughout the impact Display the recorded signal and examine the traces to ensure that they contain no spurious peaks, etc Process the data to obtain the following parameters: a) peak deceleration during the impact (g); b) deflection of the surface (in mm) for mat types to 8, percentage deflection of the surface (in %) for mat types to 12; c) resilience of the tested surface, in % NOTE The velocity and deflection during impact is obtained by successive integration NOTE Resilience is calculated from the ratio of the squares of the velocities after and before impact, expressed as a percentage Carry out 10 tests at each test location Carry out the tests at each location at intervals of to 7.2 Procedure B (type 12) 7.2.1 Homogeneity test Carry out the tests at the eight locations indicated in Figure Carry out the tests using the 78 mm diameter indentor from a fall height of 400 mm Raise the indentor to the required height and lock into position Release the indentor and allow it to fall vertically onto the test piece Record the signal from the accelerometer throughout the impact Display the recorded signal and examine the traces to ensure that they contain no spurious peaks, etc Process the data to obtain the peak deceleration value (g) Carry out five tests at each test location Carry out the tests at each location at intervals of to 10 BS EN 12503-4:2016 EN 12503-4:2016 (E) Dimensions in centimetres Figure — Procedure B (type 12) - Test location and number of tests 7.2.2 Shock absorption test Carry out the tests at the eight locations shown in Figure The fall heights and indentors shall be as detailed in Table Table — Test fall heights and indentors Test point Indentor Diameter Dimensions in millimetres B1 43 B2 43 Fall height B3 116 200 ± 1,0 B4 116 600 ± 1,0 B5 43 200 ± 1,0 B6 43 600 ± 1,0 B7 116 200 ± 1,0 B8 116 600 ± 1,0 200 ± 1,0 600 ± 1,0 Raise the indentor to the required height and lock into position Release the indentor and allow it to fall vertically onto the test piece Record the signal from the accelerometer throughout the impact Display the recorded signal and examine the traces to ensure that they contain no spurious peaks, etc Process the data to obtain the following parameters: a) peak deceleration during the impact (g); b) deflection of the surface, in mm; c) resilience of the tested surface, in % NOTE The velocity and deflection during impact is obtained by successive integration 11 BS EN 12503-4:2016 EN 12503-4:2016 (E) NOTE Resilience is calculated from the ratio of the squares of the velocities after and before impact, expressed as a percentage Carry out five tests at each test location Tests at each location shall be carried out at intervals of to Expression of results 8.1 Procedure A Each test location being tested 10 times, the retained value for each point is the mean value of the last eight values Then, calculate the overall mean values, for each parameter, which are the mean values of the values obtained at each of the eight test locations For types to 11 and for the measurement points to of type 11 express the deflection as a percentage of the mat thickness 8.2 Procedure B 8.2.1 Homogeneity test Each test location being tested five times, the retained value for each point is the mean value of the last three values Then, calculate the difference between each of the eight individual points and the overall mean value 8.2.2 Shock absorption test Each test location being tested five times, the retained value for each point is the mean value of the last three values Calculate the overall mean values, for each parameter, form the mean values of each two series of tests undertaken using similar conditions (B1 – B5, B2 – B6, B3 – B7, B4 – B8) Test report The test report shall contain the following: a) reference to this European Standard, EN 12503-4; b) complete identification of the mats tested including type, manufacturer's reference and date of fabrication; c) the temperature of test; d) the indentor used; e) the fall heights used; f) the thickness of mats type 9, 10, 11; g) the mean values of the parameters measured; h) the individual mean values for each location; i) the individual test values, if required; j) details of any deviation from the procedure 12 BS EN 12503-4:2016 EN 12503-4:2016 (E) Bibliography [1] EN 12503-1, Sports mats — Part 1: Gymnastic mats, safety requirements [2] EN 12503-2:2016, Sports mats — Part 2: Pole vault and high jump mats, safety requirements [3] EN 12503-3, Sports mats — Part 3: Judo mats, safety requirements 13 This page deliberately left blank This page deliberately left blank NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW British Standards Institution (BSI) BSI is the 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