What is a good example(s) of such form? I know that the general rule is to stick to the single-column pattern, but in my opinion many of such "rules" comes from people working on relatively simple websites. And too often the reference is a registration/purchase form. I am thinking about business apps, where users are using the form repeatedly.
I will insist on the good practice that you seem to already know which is to stick to a single column pattern. If there is a high volume of information that you need from your users in the context of a business app, then consider extending the form on multiple pages with a clear indication of completion progress.