The above picture provides a view into the engineering and construction used on the top of the spire. Union workers at Zahner prepare the part for shipment. After its installation, custom engineered panels are attached to the face of the this sub-structure, resulting in a quick and smart installation.
The solution for producing the roof consisting of more than 300 uniquely assembled megapanels, each tapered and unique in shape. This sheet metal skins of the roof cladding are produced in a custom-finish stainless steel. The complexity of this roof attests to the engineering and design prowess, as well as the skilled Zahner fabricators and installation team involved with this project.
How Buildings were Made in the Digital Dark Age
When this building was made in 1994, the architects at HOK used a proprietary software system to complete their design work. At the same time, Zahner engineers were producing their work using AutoCAD to augment what was still mostly drafting at the time.
Today, everything is defined digitally, but in the 1990’s this task was very manual. To develop the project with accuracy, Zahner took field measurements of certain defining points of the roof, and radioed them back to the shop, where a custom written AutoCAD script was waiting to divide the roof surface into panels.
Today, a similar design would be developed from a digital model. However, at the time, using process was sufficient to give Zahner engineers the tools to produce this very intricate design. If Zahner were to produce the project today, the current technologies would cut the project’s schedule in half.