Posted Dec 29, 2006, 1:48 AM
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Registered User
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Join Date: Aug 2005
Location: Toronto
Posts: 343
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You can limit the 'bounce' by limiting deflection. Using a beam with a higer moment of inertia (read: deeper) will limit deflection. A deeper beam is also taking up more head room. Anyways, you're right: steel is framed into one another. But you still have your decking resting/welded onto beams which are much deeper than a concrete slab. Plus concrete carries all the services. If we're talking economy, a waffle slab is definetly not. It would take a very long time to form it.
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