Flexible Pavement Structural Number Calculator

A flexible pavement is typically made from asphalt and are defined as flexible as they mould to the groundworks and will shape around specific objects with too much difficulty and typically allow easy access for alterations to groundworks underneath (altering / fitting electrical cables, telecommunications, gas or water works for example).

Structural Number of Flexible Pavement Calculator
Asphalt layer thickness (in inches or mm)
Layer coefficient for asphalt
Base layer thickness(in inches or mm)
Layer coefficient of base
Sub-base layer thickness(in inches or mm)
Layer coefficient of sub-base
Thickness of additional layer(in inches or mm)
Layer coefficient of additional layer
Flexible Pavement Structural Number Calculator Results
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