I know the site is called Home Improvement, and the tour says "Don't ask about... questions that are not about home improvement", but there is not a general 'construction' Stack Exchange site that I can find.
I have a question about gravel sub-bases and their appropriateness or function for an industrial (and industrial-sized) construction project near my office.
Can I ask about this on the DIY Stack Exchange site, or would it be considered off-topic?