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DESIGNER’S PRACTICAL

GUIDE – 1 GRADE SLAB

Naveen B.O.

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GRADE SLAB

In construction, a grade slab is a relatively flat concrete

structure built on top of the soil at ground level.

This simple slab design differs from the

reinforced slab technique used for elevated concrete

floors, and does not require support from underground

footers or foundation walls.

The grade acts as the foundation for a home or building,

and provides a stable base for walls and other building

elements.

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SLAB ON GRADE

 A reinforced concrete slab placed directly on the ground .GRADE

SLAB WITH MIN. REINFORCEMENT WILL PROTECT YOURFLOORING

“The grade slab design is similar to pavement design. And

hence if you provide pcc and soling below the grade slab it will

improve modulus of sub grade reaction [Spring Coefficient].

Normally filled up soil has 3 kg per Cm3 modulus of sub grade

reaction. If you provide 200mm soling and 100mm thick 1:4:8 PCC,

below grade slab, you will get ks as about 11 to 12

If you provide PVC membrane as slip members between PCC and

grade slab, the friction is reduced and hence axial tensile due friction

is nil “ 

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THANK YOU…