Precast conrete panels are fabricated at the factory not on the site and they are carried to the site where they are crained to their position as shown on the classroom construction. Below is a section through a precast concrete wall
Louise Kahn was the architect who inspired me because space and light were his primary concerns in most of his designs and this was to form the basis of my warehouse and office complex designs. The Yale Art Gallery brings out this concept more clearly.
Tilt up construction is a construction technique whereby reinforced concrete panels are cast on-site then tilted into position. These panels become the load bearing structural components amd eliminate the need for columns.
The roof elements shown are purlins, columns and a rafter beam. These are shown in a more architectural form than were usually see in an ordinary long span construction.