We have participated in our share of barn conversions but this one was very untypical.  The client wanted a glass end elevation but there were issues; the wind loading is severe, and the steel portal frame wasn’t configured to provide the necessary supports.  The glazing required that the structure would not move by more than 6mm during ‘design’ snow and maximum wind uplift conditions.  And the detailing had to be airtight and distinctly non-agricultural.