Geometrical product specifications (GPS). Inspection by measurement of workpieces and measuring equipment - Background on functional limits and specification limits in decision rules

DD CEN ISO/TS 14253-4:2010 Geometrical product specifications (GPS). Inspection by measurement of workpieces and measuring equipment. Background on functional limits and specification limits in decision rules

DD CEN ISO/TS 14253-4 is a Technical Specification which describes a method for determining the skid resistance of the pavement surface of a road or airfield.

This method defines a process for comparing the friction results from a number of devices. By combining together the friction and texture from individual measuring devices, it allows skid resistance determined by different dynamic methods to be expressed on a common scale, namely the Skid Resistance Index (SRI). As its precision has not been determined, the method should not be used in specifications for surface materials.

DD CEN ISO/TS 14253-4 excludes surfaces when they are in winter road condition. It also excludes road marking surfaces.

Contents of DD CEN ISO/TS 14253-4:

Foreword

Introduction

1 Scope

2 Normative references

3 Symbols, terms and definitions

3.1 Symbols

3.2 Terms and definitions

4 Safety

5 Measurement procedure

5.1 Friction measurement

5.2 Macrotexture measurement

5.3 Measurement location

5.4 Time interval between friction and macrotexture measurements

6 Determination of the Skid Resistance Index (SRI)

6.1 General

6.2 Calculations

6.3 Device-specific parameters

6.4 Precision

6.5 Test report

7 Calibration of friction testing devices

7.1 General

7.2 Surfaces for calibration

7.3 Test conditions

7.4 Calculations

7.5 Types of calibration

7.5.1 General

7.5.2 Type 1 calibration

7.5.3 Type 2 calibration

7.5.4 Type 3 calibration

7.6 Calibration report

7.7 Periodicity

Annex A (informative) Example of calibration calculations report

Bibliography