Disclaimer

Tip: Looking for a specific service? Each section below links back to the relevant service.

HNR Associates provides these resources for educational and preliminary design purposes only. They do not replace professional engineering judgment, site-specific investigations, or detailed design to relevant Australian Standards and local specifications. Users must independently verify inputs, assumptions, and outputs, and ensure compliance with applicable codes and council requirements. HNR Associates accepts no liability for use beyond the stated scope.

Light Traffic Pavement Design

Austroads-based flexible pavement thickness quick calculator for local/collector streets (LTTP). Includes input guidance and assumptions sheet.

Culvert Design Flowchart and Single Cell Box Structure Design

Flowcharte for Complete design steps of a culvert (often neglected).

Structure Thickness and reinforcement size calculator based on Indian Standard and working stress method.

Discharge Calculator – Rational Method (XLSX)

Q = C·I·A calculator with intensity lookup, ARI selection, and notes on assumptions & limits. Useful for preliminary drainage checks.

Retaining Wall Design (XLSX)

Design checks for RC cantilever: sliding/overturning/bearing and Reinforcement estimation.

Concrete Section Design (AS 3600) (XLSX)

Design aid for common reinforced concrete sections to AS 3600 (flexure CHECK).

How to Use

• Open in Microsoft Excel (enable macros if prompted).
• Follow the Orange input cells and read the Notes/Assumptions tab.
• Review outputs and check any warnings.
• Use results for preliminary screening only and confirm with the relevant standards.
• Need help or a tailored version? Contact HNR Associates.