Pavement Structure Design

Step-by-step layer thickness calculation via AASHTO 1993 SN method

Global Parameters

ESALs (W₁₈)

Reliability (R) %

Std Dev (S₀)

ΔPSI

Total Layers

STEP 1

Resilient Modulus (MR) under Layer 1

Calculated SN₁: --

Structural Coefficient (a₁)

Required Thickness (D₁): --

STEP 2

Resilient Modulus (MR) under Layer 2

Calculated SN₂: --

Coefficient (a₂)

Drainage (m₂)

Required Thickness (D₂): --

STEP 3

Resilient Modulus (MR) of Subgrade

Calculated SN₃: --

Coefficient (a₃)

Drainage (m₃)

Required Thickness (D₃): --

Demo Display

AASHTO 1993

Design Summary

Design ESALs (W₁₈) --

Reliability --

Total Required SN --

Total Pavement Thickness --