Assembly hall
The dome shape of the roof, by design, causes both vertical and horizontal reactions or forces on the buildings walls and monoliths. In order to make Max Abramovitz design a reality, a relatively new post-tensioning technique was required. The post-tensioning techniques required for the construction of the Assembly hall were first developed for Titan missile base construction. Felmley-Dickerson Co sub-contracted Preload Co. of New York City to post-tension a concrete ring girder around the perimeter of the dome. Preload Co. borrowed a special horizontal-wheeled tractor from the missile silo work to wind the steel wire around the dome. The wrapping machine required some slight modifications for this project.