Guidance for Overloading of Pavements at Aerodromes

Foreword

This document outlines the general criteria and guideline to be followed by an aerodrome operator on the use of pavements by aircraft with an Aircraft Classifications Number (ASN) higher than the reported Pavement Classification Number (PCN) of an aerodrome pavement.

This manual is effective from 15 October 2018.

Acronyms

ACN – Aircraft Classification Number

PCN – Pavement Classification Number

CBR – California Bearing Ratio

ICAO – International Civil Aviation Organization

P – Actual Load

Po – Allowable Load

MTOW - Maximum Take-Off Weight (kg)

OWE - Operating Weight Empty (kg)

TP - Tire Pressure (MPa)

Definitions

Aircraft Classification Number (ACN) – A number expressing the relative damaging effect of aircraft on a pavement for a specified standard subgrade strength.

The airplane manufacturer provides the official computation of an ACN value. Computation of the ACN requires detailed information on the operational characteristics of the airplane such as maximum aircraft center of gravity, maximum ramp weight, wheel spacing, tire pressure, and other factors.

Pavement Classification Number (PCN) – A number expressing the bearing strength of a pavement for unrestricted operations.