Calculate your flexible pavement structural number with our easy-to-use calculator. Get accurate, reliable results quickly and easily.
Use this calculator to determine the structural number of a flexible pavement by inputting the thickness and layer coefficients of the asphalt, base, sub-base, and any additional layers.
L=a1ta + b1tb + c1tsb +d1tad
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