Shear cap vs drop panel

Flat slab design is usually associated with punching shear. In order to reduce the shear stress induced around columns designers usually increase the slab thickness near the column. This increase in thickness in the vicinity of columns is usually called "drop panel".

Is it technically correct to call every thickness increase around columns drop panel? The answer to this question is NO! And let's see an article from ACI 318-14 to arrive at a correct naming/term.

drop panel - projection below the slab used to reduce the amount of negative reinforcement over a column or the minimum required slab thickness, and to increase the slab shear strength. shear cap - projection below the slab used to increase the slab shear strength

shear caps (popularly called shear heads) are commonly used, especially when the transverse reinforcement does not give the required load capacity. The second advantage of using the shear heads is the increased stiffness of the slab, which positively influences slab deformations

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