1、BSI Standards PublicationBS EN 12235:2013Surfaces for sports areas Determination of vertical ballbehaviourBS EN 12235:2013 BRITISH STANDARDNational forewordThis British Standard is the UK implementation of EN 12235:2013. It supersedes BS EN 12235:2004 which is withdrawn.The UK participation in its p
2、reparation was entrusted to Technical Committee PRI/57, Surfaces for sports areas.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 c
3、orrect application. The British Standards Institution 2013. Published by BSI Standards Limited 2013ISBN 978 0 580 78889 5 ICS 97.220.10 Compliance with a British Standard cannot confer immunity from legal obligations.This British Standard was published under the authority of the Standards Policy and
4、 Strategy Committee on 30 September 2013.Amendments issued since publicationDate T e x t a f f e c t e dBS EN 12235:2013EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 12235 September 2013 ICS 97.220.10 Supersedes EN 12235:2004English Version Surfaces for sports areas - Determination of vertica
5、l ball behaviour Sols sportifs - Dtermination du comportement en rebond vertical de la balle/du ballon Sportbden - Bestimmung der Ballreflexion This European Standard was approved by CEN on 11 July 2013. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the co
6、nditions 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 exi
7、sts 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 st
8、andards 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,
9、Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels 2013 CEN All rights of exploitation in any form and by any means rese
10、rved worldwide for CEN national Members. Ref. No. EN 12235:2013: EBS EN 12235:2013EN 12235:2013 (E) 2 Contents Page Foreword . 3 1 Scope 4 2 Normative references . 4 3 Principle 4 4 Apparatus . 4 5 Sports surface for testing 5 6 Conditioning . 5 7 Procedure . 5 7.1 Determination of the rebound heigh
11、t of the ball from concrete . 5 7.2 Determination of the rebound height of the sports surface . 6 8 Expression of results . 6 9 Test report 6 BS EN 12235:2013EN 12235:2013 (E) 3 Foreword This document (EN 12235:2013) has been prepared by Technical Committee CEN/TC 217 “Surfaces for sports areas”, th
12、e secretariat of which is held by AFNOR. 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 March 2014, and conflicting national standards shall be withdrawn at the latest by March 2014. Attention is
13、 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 12235:2004. Compared with EN 12235:2004, the text has been clarified a
14、nd editorial errors have been corrected. 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 Yu
15、goslav 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 12235:2013EN 12235:2013 (E) 4 1 Scope Th
16、is European Standard specifies a method for determining the rebound height of a ball from a surface, when dropped vertically. 2 Normative references The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated referenc
17、es, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. EN 12229, Surfaces for sports areas Procedure for the preparation of synthetic turf and needle-punch test pieces 3 Principle A ball is allowed to fall vertica
18、lly onto a surface and the height to which it rebounds is measured and calculated as the percentage rebound height. 4 Apparatus 4.1 Ball, conforming to the regulations of the governing body of the relevant sport and with any additional requirements given in Table 1. NOTE These requirements have been
19、 found to be acceptable in use, and it has not been found necessary to specify additional requirements such as circumference or mass of the ball. Table 1 Properties of balls Type of ball Drop height (m) dRebound height from concrete c, d(m) K1 a(s) Additional requirements Basketball 1,80 0,01 1,050
20、0,025 0,025 Use a mens nylon wound basketball. Conform to FIBA requirements Association football b2,00 0,01 1,350 0,05 0,025 Conform to FIFA requirements Tennis ball 2,54 0,01 1,400 0,025 0,005 Conform to ITF requirements Hockey ball 2,00 0,01 0,640 0,025 0,038 Conform to FIH requirements aK1is an e
21、mpirically determined correction factor. bThe precision of the test using footballs is 10 % absolute. cThe rebound height from concrete is measured as described in 7.1 to determine if the ball is suitable for tests on the test piece. dThe drop height and rebound height should always be measured from
22、 the bottom of the ball. BS EN 12235:2013EN 12235:2013 (E) 5 4.2 Ball release device, which operates smoothly without imparting any impulse or spin to the ball and which allows the ball to be dropped vertically from the specified height. NOTE Examples of suitable devices include vacuum and mechanica
23、l arrangements or an electromagnetic release device with a very small thin metal plate attached to the test ball. 4.3 Acoustic recording apparatus, comprising a microphone and timing device, activated acoustically, and giving a reading accurate to within 1 ms. NOTE The device is activated by the sou
24、nd from the first bounce of the ball and deactivated by the sound from the second bounce, the time between these events being denoted T, in seconds. 5 Sports surface for testing The test may be carried out on site, on indoor or outdoor sports surfaces, or on a test piece assembled for test purposes.
25、 If a test piece is to be used, prepare this from a representative sample of the sports surface, in combination with the supporting layers used with the surface in service. Assemble the surface and supporting layers in accordance with the method recommended by the manufacturer so that the test piece
26、 is of minimum size 1,0 m x 1,0 m or larger on the manufacturers recommendation. Test pieces shall be prepared in accordance with EN 12229. NOTE 1 For certain constructions, such as unbound bases and area-elastic floors, a larger specimen might be necessary to be representative. For certain construc
27、tions, such as area-elastic and combined elastic floors, no mass (including test operatives) greater than 10 kg should be within a 1 m radius of the test location. NOTE 2 Smaller samples can be tested when the surface flooring has undergone special conditioning such as ageing on the Lisport and a 1,
28、0 m x 1,0 m sample size is not possible. 6 Conditioning Condition the test pieces for a minimum of 3 h at the test temperature, except when the material is known to be very sensitive to humidity, in which case condition them for a minimum of 88 h at a relative humidity of (50 5) % at the test temper
29、ature. Unless otherwise specified, condition and test the test pieces at a temperature of (23 2) C. For tests on site, condition the ball for a minimum of 1 h at the prevailing temperature and humidity. 7 Procedure 7.1 Determination of the rebound height of the ball from concrete Set the ball releas
30、e device at the appropriate drop height for the ball, as given in Table 1. Drop the ball onto a stable concrete test surface of minimum size 1,0 m x 1,0 m or larger and minimum thickness 0,05 m, ensuring that the ball does not hit the surface within 100 mm of the edge of the surface. If a concrete t
31、est surface is not available, an appropriate floor with a rigid substrate may be used. A suspended floor structure is not suitable. Record from the timing device the time, T, in seconds, between the first and second bounces of the ball. Calculate the height, H, in metres to which the ball rebounds u
32、sing the following formula: BS EN 12235:2013EN 12235:2013 (E) 6 ( )2123,1 KTH = where T is the time in seconds, between the first and the second bounces of the ball; K1is the correction factor, in seconds, given in Table 1. Repeat the procedure to obtain a total of five readings all within a 1,0 m r
33、adius. Calculate and record the mean of the five values of H as the rebound height of the ball from concrete. If the rebound height differs from the value given in Table 1, either discard the ball and repeat the procedure using another ball(s) until the value is met, or, if applicable, adjust the ba
34、ll inflation pressure and repeat the procedure until the value is met. 7.2 Determination of the rebound height of the sports surface For tests in the laboratory, repeat the procedure given in 7.1, overlying the concrete test surface with the sports surface. For tests on site, repeat the procedure gi
35、ven in 7.1 replacing the concrete test surface with the sports surface. For tests under wet conditions, prepare the test area using the procedure specified in the relevant product specification. When making measurements on site, record the temperature and whether the surface was dry or wet. 8 Expres
36、sion of results Calculate the relative percentage rebound height, for the sports surface from the following formula: 100% =CSRRR where R% is the relative percentage rebound height; RSis the rebound height from the sports surface, in metres; RCis the rebound height from concrete, in metres. 9 Test re
37、port The test report shall include the following information: a) reference to this European Standard, i.e. EN 12235:2013; b) complete description of the surface tested, including the manufacturers reference, type of supporting layers and method of attachment; c) conditions under which the test was c
38、arried out, i.e. either under laboratory conditions with details of conditioning, or on site, in ambient conditions; d) the temperature and moisture condition at which the test was carried out, if applicable; BS EN 12235:2013EN 12235:2013 (E) 7 e) description of the type of the ball used in the test
39、 and the height from which it was dropped; f) relative percentage rebound height; g) absolute rebound height; h) date of the test. This page deliberately left blankThis page deliberately left blankBSI is the national body responsible for preparing British Standards and other standards-related public
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