Bsi bs en 14809 2005 (2007)

www bzfxw com BRITISH STANDARD BS EN 14809 2005 Incorporating corrigendum no 1 Surfaces for sports areas — Determination of vertical deformation The European Standard EN 14809 2005 has the status of a[.]

BRITISH STANDARD BS EN

14809:2005

Incorporating corrigendum no 1

Surfaces for sports

areas — Determination

of vertical deformation

The European Standard EN 14809:2005 has the status of a

British Standard

ICS 97.220.10

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This British Standard was

published under the authority

of the Standards Policy and

Strategy Committee

on 30 June 2006

National foreword

This British Standard is the UK implementation of EN 14809:2005, incorporating corrigendum October 2007

The UK participation in its preparation 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 correct application

Compliance with a British Standard cannot confer immunity from legal obligations.

Amendments issued since publication

Amd No Date Comments

17512 31 December 2007 The second and third sentences have

EUROPEAN STANDARD

NORME EUROPÉENNE

EUROPÄISCHE NORM

EN 14809

December 2005

ICS 97.220.10

English Version

Surfaces for sports areas - Determination of vertical deformation

Surfaces de sols sportifs - Détermination de la déformation

verticale

Sportböden - Bestimmung der vertikalen Verformung

This European Standard was approved by CEN on 28 November 2005.

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 Central Secretariat 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 Central Secretariat has the same status as the official versions.

CEN members are the national standards bodies of Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.

EUROPEAN COMMITTEE FOR STANDARDIZATION

C O M I T É E U R O P É E N D E N O R M A L I S A T I O N

E U R O P Ä I S C H E S K O M I T E E F Ü R N O R M U N G

Management Centre: rue de Stassart, 36 B-1050 Brussels

© 2005 CEN All rights of exploitation in any form and by any means reserved

worldwide for CEN national Members.

Ref No EN 14809:2005: E

Incorporating corrigendum October 2007

Contents

page

Foreword 3

1 Scope 4

2 Normative references 4

3 Terms and definitions 4

4 Principle 4

5 Test piece 5

6 Conditioning and test temperature 5

7 Apparatus 5

8 Procedure 6

9 Expression of results 7

10 Test report 8

EN 14809:2005 (E)

3

Foreword

This European Standard (EN 14809:2005) has been prepared by Technical Committee CEN/TC 217 “Surfaces for sports areas”, the secretariat of which is held by BSI

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 June 2006, and conflicting national standards shall be withdrawn at the latest by June 2006

According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom

1 Scope

This European Standard specifies a method for the determination of the vertical deformation of sports surfaces

NOTE The method specified is commonly known as the Artificial Athlete (Stuttgart) method

The following referenced documents are indispensable for the application of this European Standard For dated references, 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 textile test pieces ISO 6487, Road Vehicles — Measurement techniques in impact tests — Instrumentation

3 Terms and definitions

For the purposes of this European Standard, the following terms and definitions apply

3.1

area-elastic sports surface

sports surface, to which the application of a point force causes deflection over a relatively large area around the point of application of the force

3.2

point-elastic sports surface

sports surface, to which the application of a point force causes deflection only at or close to the point of application

of the force

3.3

combination-elastic sports surface

area-elastic sports surface with a point-elastic top layer, to which the application of a point force causes both localized deflection and deflection over a wider area

3.4

mixed-elastic sports surface

point-elastic sports surface with an area-stiffening component

NOTE A mixed-elastic sports surface has deflection characteristics between those of an area-elastic surface and a point-elastic surface

3.5

vertical deformation

deformation of the surface to an applied normalized load

4 Principle

A weight is allowed to fall onto a spring placed on the test piece; the maximum deformation applied is recorded

EN 14809:2005 (E)

5

For area-elastic and combined-elastic sports surfaces, the test piece shall be a sample of the complete surfacing system measuring 3,5 m by 3,5 m, assembled and installed in accordance with the manufacturer’s stated method,

on a substrate complying with the manufacturer’s requirements

For point-elastic and mixed-elastic sports surfaces, the test piece shall be a piece of the surface of minimum size 1,0 m by 1,0 m, in combination with the supporting layers to be used in service and using the recommended method of attachment in accordance with the manufacturer’s instructions

Laboratory test pieces of either synthetic turf or textile materials shall be prepared in accordance with EN 12229

6 Conditioning and test temperature

For tests in the laboratory, condition the test piece for a minimum of 40 h at a temperature of (23 ± 2) °C

Tests on site shall be carried out at the prevailing ambient temperature and humidity, which shall be recorded and reported

7 Apparatus

7.1.1 The principle of the apparatus is shown in Figure 1 and consists of the components specified in 7.1.2 to

7.1.11

7.1.2 Falling weight having a mass of (20 ± 0,1) kg with a hardened striking surface guided so that it is allowed to fall smoothly and vertically with minimum friction

7.1.3 Spiral spring, having a diameter of (69 ± 1) mm, whose characteristic, when mounted in the assembly

described, is linear with a spring rate of (40 ± 1,5) N/mm over the range 0,1 kN to 1,6 kN with a hardened upper plate

7.1.4 Adjustable supporting feet, at least 250 mm from the point of application of the load for a point elastic

sports surface and at least 600 mm from the point of application of the load for an area elastic sports surface

7.1.5 Steel base plate, having a flat lower side, an edge radius of 1 mm, a diameter of (70,0 ± 0,1) mm and a minimum thickness of 10 mm

7.1.6 Metal guiding tube having an internal diameter of (71,0 ± 0,1) mm

7.1.7 Two horizontal projections on the testing foot for the sensors

7.1.8 Testing foot, consisting of the steel base plate, force sensing device, spring and the upper plate (minimum

thickness 20 mm, measured at the centre of the plate) together, guided in the guiding tube The total mass of the testing foot (without guiding tube) shall be (3,5 ± 0,35) kg

7.1.9 Two sensors, e.g electronic pick-ups with a measuring range of ± 10 mm and an uncertainty no greater than 0,05 mm The distance between the sensors and the axis of the apparatus shall be ≤ 125 mm The sensors shall be symmetrically positioned around the central axis of the apparatus

7.1.10 Means of supporting the weight, allowing it to be set to the drop height with an uncertainty no greater than

± 0,25 mm

7.1.11 Means of conditioning and recording the signal from the force sensing device and the sensors and a

means of displaying the record

The channel frequency class of the conditioning amplifier, in accordance with ISO 6487, shall be ≥ 1 kHz

The conditioning amplifier shall be followed by or shall incorporate a low-pass filter having a 2nd order Butterworth characteristic with a -3 dB frequency of 120 Hz Filtration may be implemented in hardware or software The response of the system at any given frequency shall be within ± 0,5 dB of the expected response, calculated on the basis of the Butterworth function

The system should be able to record the peak value of single force pulse signals of 10 ms duration with an uncertainty of no greater than ± 2 %

If digital recording techniques are used, the word length shall be ≥ 12 bits, the amplitude of the signal shall be no less than 25 % of the equipment full scale and the sampling frequency shall be ≥ 2 kHz or twice the upper frequency response limit of the amplifier/filter system preceding the digital system, whichever is the greater

8 Procedure

8.1 Set up the apparatus so that it is vertically positioned on the test piece such that the weight falls at least

20 cm from the edge, for point-elastic and mixed-elastic sports surfaces, or at least 1 m from the edge, for area-elastic and combination-area-elastic sports surfaces

8.2 Adjust both sensors (e.g deformation pick-ups) on the connecting line of the sensors through the falling weight axis with the same distance to the falling weight axis on a separate stand (total distance between the sensors ≤ 125 mm) Depending on the type of sports floor, the minimum distance between the supporting feet on the stand and the falling weight axis shall be given in the appropriate specifications

8.3 Before carrying out measurements, the deformation pick-ups shall contact the horizontal projections on the test foot Activate the recording device before releasing the falling weight

8.4 Set the height of the lower face of the falling weight so that it is (120 ± 0,25) mm above the testing foot The testing foot gives a pre-loading of the surface and a corresponding deformation of the surface This is the zero position Allow the weight to fall onto the testing foot once only

8.5 Record the force applied to the surface and the resulting deformation in the course of the impact Within

5 s of the impact, lift and re-attach the falling weight to its support mechanism so that the surface can recover before the following impact

8.6 Unless otherwise specified, repeat the procedure described in 8.4 twice at intervals of 1 min giving a total

of three impacts Record the mean value of the deformation from the second and third impacts If further tests are

to be carried out on the same sample, each test shall be carried out at a new location, no test position being less than 100 mm from any other

EN 14809:2005 (E)

7

9 Expression of results

9.1 Calculate the vertical deformation, D, from the following equation

max max

N 500

1

f F

D  ×











=

where

fmax is the maximum deformation of the sports floor in the falling weight axis, expressed in millimetres

(mm) (mean maximum of the pick-up values at each time);

Fmax is the maximum force (peak value), expressed in Newtons (N)

9.2 Calculate the vertical deformation of a single testing spot as the mean of the vertical deformation results of the last two impacts, unless otherwise specified, and report the result to the nearest 0,1 mm

1

2 3

6

9

10 10

Key

1 guide for the falling weight

2 electromagnet

3 falling weight

4 upper plate

5 spring

6 guiding tube

7 force sensing device

8 base plate

9 horizontal projections

10 sensors (pick up)

Figure 1 — Artificial athlete apparatus

10 Test report

The test report shall include the following information

a) reference to this European Standard, i.e EN 14809:2005;

b) complete identification of the surface tested, a statement of the manufacturer’s reference, the type of supporting layers and method of attachment, and the dimensions of the test piece;

c) ambient temperature and relative humidity;

d) deformation, D;

e) condition of the surface at the time of test, i.e wet or dry;

f) statement of the uncertainty on the result reported

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