#11 In the design of two-way floor systems, ACI 318 Chapter 13 distinguishes between flat slabs and flat plates. One feature of a flat slab that isn\'t found in a flat plate is a (A) drop panel (B) shear head (C) column strip (D) middle strip Solution Both are used as two way floor or roof system. The main difference is that the Flat Slab is a two way reinforced structural system that alwas incude a drop pannel or column capital to support heavey column laod which is not present in Flat slab. Ans is A.