Proposals for Composite Floor Systems and Stiffened Plate Floor Decks Earn Prizes in Multi-Story Residential Competition

摘要

A proposal for developing a composite floor system incorporating structural steel and aerated concrete earned a 10,000 dollars prize in AISC's competition to develop innovative systems for multistory residential construction. The system, proposed by Keith Itzler of Goodkind & O'Dea in New York City, is a combination of structural steel and autoclaved aerated concrete (AAC). The system proposed has a high potential for development, meets the evaluation criteria and should be beneficial to promoting the use of both steel and AAC in multistory residential buildings. A 5,000 dollars second prize was awarded to Patrick M. Hassett, S.E., of Hassett Engineering in Castro Valley, CA, for his proposal for a "stiffened plate floor deck." The proposed system use a relatively thin deck plate stiffened by "closed" ribs similar to a deck system used in orthotropic steel bridge decks. Unlike bridge construction, this "Stiffened Plate Floor Deck" (SPFD) does not require fracture-critical steel or high-quality control welding since the deck design is controlled primarily by deflection criteria.