Answer / mughalsab

if i dont raised at mid ponit of slab so when we poured concrete then the slab is sag at mid point due to its own weight therefore we raised at mid point so when concrete is poured then the slab is going to its corect position.

Answer / rj

so as to have a camber at the middle area.

Answer / bharat gurav

because at middle point act point load & share force act at
L/4 so extra steel r provided...............but at mid-span
no provide extra steel due 2 sla raise 10-12mm

Answer / amar kantak

FOR POURING CONCRETE

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