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BS EN 17435:2021

BS EN 17435:2021

$102.76

Surfaces for sports areas. Test method for the determination of Head Injury Criterion (HIC) and Critical Fall Height (CFH)

Published By Publication Date Number of Pages
BSI 2021 20
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This document specifies test methods for measuring the impact attenuation of sports surfaces. Three different methods are specified. In Procedure A, a series of tests are undertaken from differing drop heights and the HIC values are plotted, and the Critical Fall Height determined. In Procedure B, a single test is undertaken from differing drop heights and the HIC values are plotted, and the Critical Fall Height determined. In Procedure C a series of tests are made at a fixed drop height and the maximum value of HIC is calculated. This test method is primarily intended for use on both natural and synthetic turf sport surfaces. It may be carried out in a laboratory on test specimens or in situ on installed sports surfaces. This test method may not be suitable for sports surfaces covered by EN 14904.

PDF Catalog

PDF Pages PDF Title
2 undefined
7 1 Scope
2 Normative references
3 Terms and definitions
8 4 Test apparatus
4.1 Suitability
4.2 Components of the apparatus
4.2.1 General
4.2.2 Headform
9 4.2.3 Accelerometer
4.2.4 Signal processor (optional)
4.2.5 Guidance system
4.2.6 Fall height measuring equipment
4.2.7 Release system
4.2.8 Signal transmission system
4.2.9 Impact measuring equipment
10 4.3 Accuracy of apparatus
4.3.1 Calibration
11 4.3.2 Checks by operators
5 Test conditions
5.1 General
5.2 Laboratory tests
5.2.1 Characteristics of the laboratory test floor
5.2.2 Conditioning and Test Temperature
5.3 Site tests conditions
12 6 Test specimens
6.1 General
6.2 Laboratory test specimens
6.3 Tests on site
7 Test procedure
7.1 Principle
7.2 Conditions for testing
13 7.3 Measurement of HIC
7.3.1 Drop Heights
7.3.2 Site Preparation
7.3.3 Trace Results
7.3.4 Calculating HIC
14 7.4 Testing Procedures A-C
7.4.1 Procedure A – Three drop method for Critical Fall Height (CFH)
15 7.4.2 Procedure B – Single drop method for Critical Fall Height (CFH)
7.4.3 Procedure C – Determination of HIC at fixed drop height
8 Test report
16 Annex A (informative)Typical examples of trace acceleration against time and curve of HIC values against drop height
17 Annex B (informative)Verification of computer algorithm used for the calculation of HIC

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BS EN 17435:2021
$102.76