Irving Trust's bank vault, weighing was located below ground level. At the time of the building's 1931 completion, the vault was the second-largest in the city and third-largest in the world, behind those of the Federal Reserve Bank of New York Building and the Bank of England. The vault was encased in a wall composed of iron, steel, and concrete. The vault contained three stories and stretched from Broadway to New Street; the upper floor of the vault was used by bank customers while the lower floors stored Irving Trust's own fortunes. Each story had of space. A tank of water, as well as modern chemical, electrical, and mechanical features, were used to prevent potential break-ins.