The cast iron facades, high ceilings, and wide-open floor plans that made the neighborhood so desirable as a place for artists, and later well-heeled residents, are rooted in SoHo's industrial past. It was a neighborhood of factories and manufacturing. That era has passed, however, and after more than a century in business, John De Lorenzo and Bro., Iron and Sheet Metal Contractor closed their shop this week. It will be converted to a building housing......