Flexible Pavement Structural Number Formula - Civil Engineering

Formula:


L=a1ta + b1tb + c1tsb +d1tad

Where,

L=Structural Number of Flexible pavement,
a1=Layer coefficient for asphalt ,
ta=Asphalt layer thickness,
b1=Layer coefficient of base,
tb=Base layer thickness ,
c1=Layer coefficient of sub-base,
tsb=Sub-base layer thickness,
d1=Layer coefficient of additional layer,
tad=Thickness of additional layer

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