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Thickened part of the flat slab over its supporting column is known as :

  • A.Beam head and panel
  • B.Column head
  • C.Drop panel
  • D.Capital

Answer: C

The thickened part of the slab over a column is the drop panel.

In a flat slab the slab rests directly on the columns, so shear and negative moment are concentrated around each column. A drop is a local thickening of the slab itself over the column, which increases the depth there to resist punching shear and hogging moment.

A column head, also called a capital, is the flared top of the column, not part of the slab. 'Beam head and panel' is not a flat slab term; a flat slab has no beams at all.

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