thomas.potgieter@lonrix.com Administrator Posts: 5 12/8/2020

thomas.potgieter@lonrix.com Administrator Posts: 5 The AASHTO 1986 Design Method tool allows you to evaluate the pavement's structural capacity using the AASHTO design method as documented in the 1986 AASHTO Design Guidelines. Although this method is now outdated, it still provides a useful check to ensure that your pavement's structural capacity is roughly in line with empirical observations recorded under controlled conditions. Getting Started The AASHTO 1986 Design Method Tool is accessed through the Design Tools icon on the Rubicon Toolbox Online Tools. If this is the first time you are using the Online Tools, you will need to set up a project by clicking on Manage Projects and create a new project. Alternatively, you can use an existing project if one has already been created. Defining the Pavement Structure Before you use the AASHTO design tool, you will need to define your pavement structure. The Pavement Layer selection in the first column represents one of three standard conversions from the E-modulus entered to Layer Coefficient used in the AASHTO method to calculate Structural Number (SN). The standard model provides for three layers, but more layers may be added (bottom right). In such cases, however, an assumption on the pavement layer material/ conversion function will have to be made that closest resembles the situation. A sensitivity analysis may also be performed. The Subgrade Layer is handled separately from other pavement layers and the method makes provision for using subgrade stiffness values representing different seasons (where available). Analysis and Reporting Once you have defined the pavement structure, input the relevant indices information and click on Calculate to generate the analysis report. Note, for a new analysis, the Save option is initially inactive. Once an analysis is saved for the first time using Save As, the save option becomes active. To overwrite an existing saved analysis, click on Save. To save as an alternative analysis, click on Save As. Alternatively, you can clone your analysis, from the Online Tools page, and rename it as needed. The report can be copied to the clipboard by right clicking on the report and selecting Copy image or Save image as. The image can then be inserted into a document of your choice (Word, Excel etc.). edited by on 12/8/2020 edited by on 3/18/2021 edited by on 1/22/2023 edited by on 8/25/2023

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