If you do manage to obtain a functioning copy, here’s a quick workflow:
Download FHWA HY-8 (free, official, and superior). It will run on modern Windows 10/11, output professional reports, and is accepted by regulatory agencies worldwide.
For concrete box culverts, the software doesn't just analyze forces; it can design the reinforcement. It checks the structural capacity against design codes (such as AASHTO LRFD or Standard Specifications) and helps engineers determine the optimal rebar spacing and wall thicknesses required for safety and compliance. Eriksson Culvert 4.0.4 Free Download
If you cannot find a safe , don’t worry. These tools are free, legal, and more powerful:
Automatically determines whether the culvert is governed by inlet conditions (e.g., submerged entrance) or outlet conditions (e.g., tailwater backup). If you do manage to obtain a functioning
The software allows engineers to model various types of culverts, including:
Print a summary including velocity, Froude number, and required riprap size. It checks the structural capacity against design codes
Assuming you have a legal license key or find a preserved trial version: