TWO MONTHS of work were cut from the construction time of a two-story factory recently built in Burbank, Calif., by means of “tilt up” techniques. Rapidly becoming a favorite method of constructing large, reinforced buildings, the method is fast and said to be inexpensive. Wall sections are poured in forms lying on the previously cured concrete floor, then raised and moved into place by a crane. Adjoining sections are tied together by means of reinforced-concrete columns. The method avoids all use of the costly wooden frames formerly required. In the Burbank operation, each precast wall slab measured 20 by 31 feet, was 6 inches thick and weighed 22 tons. A single crane placed 15 of the slabs in a day. Usually confined to single-story construction, the use of tilt-up techniques at Burbank marked one of the first times that the cost-cutting method was applied to two-story buildings. Approximately 45,000 feet of floor space are contained in the factory.
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