In Texas they like their buildings big. And Dallas' new Memorial Auditorium is one of the most spectacular big buildings in Texas. This imposing reinforced concrete structure strengthens the city's claim as a convention center. The main arena boasts several innovations in design and construction. Reinforced concrete was chosen as the structural material because estimates indicated it was most economical, required the least maintenance, and offered a heavier roof mass, an important acoustical consideration. Complex in conception, but simplicity itself in design, the arena was built with reusable forms for the sectioned dome, for the cantilevers that support it, and for the permanent grandstand. Repeated use of these forms reduced the total cost to about half of the at estimated for a building with a full concrete or structural steel dome.