This posed a number of engineering constraints since the chimney needed to be raised from its original height of some 36 to 46 meters to meet current legal requirements. This was achieved by inserting an exhaust tube for any smoke on the top of the chimney.
The plan also demanded that the chimney form a stand-alone structure located in an open pedestrian area within the new university campus. This made safety a very important consideration. However, the chimney had a weak load-bearing structure with masonry less than 15 cms thick so that swaying in high winds might cause unacceptable stresses.