We installed a new exhaust fan for them as well as routed the duct work to the roof. The ducts had to to go from the first floor to the seventh floor, across the roof, and up four more stories against the adjoining building.
For this project we were required to bring a big crane onto the middle of Atlantic Avenue to access the roof. We welded the duct work on the street and used the crane to fly them to the roof.
Getting a crane onto Atlantic Ave is no small feat. You only get one chance to do it right. The project went smoothly without a hitch. We finished on time without incident.