Second story rollup doors — why?
January 30, 2014 8:51 PM Subscribe
Industrial buildings frequently have rollup doors on the second or even third story. The ones in question don’t have a horizontal I-beam or timber to hang a winch or block & tackle from, (like you’d see on a hayloft,) so they’re not for day-to-day loading/unloading. The ones I see in the city are generally facing a sidewalk, not a dedicated open space like a loading bay or parking lot. What are these doors for? The only guess I’ve come up with is occasional installation of equipment that’s too big for a freight elevator. But large-scale machinery usually comes in pieces and is assembled on-site, and the stuff that can’t be (e.g. large pressure vessels, crucibles, this thing) isn’t stuff that’s ever installed upstairs in a general-purpose light industrial building. I’m stumped.