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Significance and Use
This practice defines and prescribes how to calculate IRFI on aircraft movement areas in winter.
The local device is calibrated directly or indirectly to the reference device, thereby achieving harmonization of local friction devices to a common unit of measure regardless of the local friction device used.
The IRFI can be used by airport maintenance staff to monitor the winter frictional characteristics for surface maintenance actions.
1.1 This practice covers the calculation of the International Runway Friction Index, IRFI, from measurements obtained by local friction-measurement devices on movement areas under winter conditions.
1.2 The IRFI is the international friction index to be used for reporting the friction characteristics of airport movement areas.
1.3 The IRFI reported by this practice is a harmonized value of the pavement friction characteristics.
1.4 The IRFI obtained by using this practice has not been extended to address the braking performance of an aircraft.
1.5 The values stated in SI units are to be regarded as the standard. The values given in parentheses are provided for information only.
1.6 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.
2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.
E524 Specification for Smooth Tire for Pavement Skid-Resistance Tests
E867 Terminology Relating to Vehicle-Pavement Systems
E1551 Specification for Special Purpose, Smooth-Tread Tire, Operated on Fixed Braking Slip Continuous Friction Measuring Equipment
E1844 Specification for A Size 10 4-5 Smooth-Tread Friction Test Tire
E1859 Test Method for Friction Coefficient Measurements Between Tire and Pavement Using a Variable Slip Technique
E1960 Practice for Calculating International Friction Index of a Pavement Surface
ICS Number Code 93.080.99 (Other standards related to road engineering)
UNSPSC Code 95121614(Runway)
ASTM E2100-04(2010), Standard Practice for Calculating the International Runway Friction Index, ASTM International, West Conshohocken, PA, 2010, www.astm.orgBack to Top