Voided Two-Way Slab Design Based on ACI 318-14

Voided Two-Way Slab Design Based on ACI 318-14

Voided slabs have been used in construction of reinforced concrete floor systems for over 100 years. This article offers an historical perspective on this technology. A discussion of early applications through several case studies is followed by on overview of traditional systems still in use and concludes with a discussion on new technological advancements. 

The improvements on this "old" concept have taken the efficiency of voided slab systems to the next level with economical spans reaching 50 feet. In voided two-way slabs, a hard shell with struts is created through the use of appropriately located cavities formed by void formers.
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