The architect of the Sheraton Grande Torrey Pines in La Jolla, California, provided all guests with an ocean view by designing a 30 percent bend in the sidewalls of the rooms. Walls that are 8 inches thick and slabs that are 5.5 inches thick also give guests the added benefits of fire safety and noise resistance. The contractor, Hensel Phelps Construction Company, decided to use the so-called forming system in order to meet the compressed time schedule. With tunnel forming systems, room-size or larger modules of formwork are lifted into place by crane for the casting of bearing walls and slab in a single pour. At Torrey Pines, the tunnel form for each room was split vertically down the center of the 13.5-foot room width to accommodate the skews in the guest room walls.
Among the forming hardware features designed for improved efficiency were cam locks that held the knee braces of struts supporting deck portions of the forms. Cam lever connectors were used to align and pull mating edges of form sections together. Permanent magnets secured small blockouts used to form openings in the deck, with a magnet placed in each corner of a blockout. The forms were built heavier - 18.5 pounds per square foot - and with thicker skins than typical European-made tunnel forms, to resist deflection and assure that the walls remained straight.