do you want a piece of me?

There is a large shaft running vertically through the houses that all the different trades have been using to run pipes (water, waste, radiant heating pipes) vacuum tubing, electrical wires power, Cat5e, cable and telephone), ductwork, and exhaust ducts for the boiler, fireplace, kitchen hood, bathroom fans, and dryer. Everyone seems to have worked together to get the job done. There are access panels throughout house to access the shaft. It runs behind the bathrooms on the 3rd and 4th floors.