Prestressed Concrete
Prestressed concrete, invented by Freyssinet in 1928, is a method for overcoming concrete's natural weakness in tension, thereby enabling longer span.
Read more about this topic: Voided Biaxial Slab
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“There can be no difference anywhere that doesn’t make a difference elsewhere—no difference in abstract truth that doesn’t express itself in a difference in concrete fact and in conduct consequent upon that fact, imposed on somebody, somehow, somewhere, and somewhen.”
—William James (1842–1910)