27-10-2016, 10:01 AM
FLAT SLABS are slabs with or without drops supported generally without beams by columns with or without column heads. The slabs may be solid or have recesses formed on the soffit to give waffle slab. The slab is normally thicker than that required for normal solid floor slab construction, but the omission of beams facilitates provision of a smaller storey height for a given clear height, and the construction and provision of formwork simpler.
Types of flat slab
• Flat Slab with drop panels
• Flat slab with column head
• Flat slab with drop panel and column head
• Flat Slab resting directly on columns Drop is a local thickening of the slab in the region of column Structural Advantages
• increase shear strength of slab
• increase nega5ve moment capacity of slab
• s5ffen the slab and hence reduce deflec5on Column head is a local enlargement of the column at the junc5on with the slab Structural Advantages
• increase shear strength of slab (punching shear)
• reduce the moment in the slab by reducing the clear or effective span
Types of flat slab
• Flat Slab with drop panels
• Flat slab with column head
• Flat slab with drop panel and column head
• Flat Slab resting directly on columns Drop is a local thickening of the slab in the region of column Structural Advantages
• increase shear strength of slab
• increase nega5ve moment capacity of slab
• s5ffen the slab and hence reduce deflec5on Column head is a local enlargement of the column at the junc5on with the slab Structural Advantages
• increase shear strength of slab (punching shear)
• reduce the moment in the slab by reducing the clear or effective span