Okay, a bit embarassed here -- I don't know what you mean by "Hoffman"-style. We built a TBH that would fit a standard Langstroth top bar, because my friend doesn't have access to shop space and/or the ability to make the parts herself. We thought that by using standard "L" top bars, she could replace them as needed. We are only dealing with top bars here, no side frames.
The Langstroth top bars are only 1" wide, so when I realized they might be too narrow, that's when I posted the question.
Will the bees adapt to the lack of width, or do I need to hussle my fanny and replace the top bars? The bees arrive on 4/14.
In the meantime, I will look up the Hoffman frames so I, at least, will know what that means.... :-\