Whats si the max.thickness of slab?



Answer:
A concrete slab for the home is typically 3 1/2" thick except under load-bearing walls and the perimeter, where it is much thicker. In the garage, the slab may be 5 1/2" thick because of the load of the car(s).

I have heard of slabs several feet thick in facilities that manufacture electronic microcircuits. This is to minimize vibration, which is one of the factors that limits how small that transistors can be fabricated. The smaller the transistor, the more you can put on a chip, and the more powerful your microprocessor or the more memory in your RAM.

Thick slabs are also common in the construction of a large concrete dam. The concrete is poured several feet at a time, starting at bedrock and going all the way up to the spillway. Although it is poured in layers, each layer is essentially a slab.

There are difficulties when a thick concrete slab is poured. One difficulty is the tremendous pressure that pushes against the forms. Another difficulty is controlling the heat that develops within the concrete as it undergoes the chemical transformation that causes it to set. Keeping the temperature down produces a stronger concrete. I know that the concrete mixed for the construction of the Glen Canyon Dam in Arizona used an ice slurry instead of water.
Whatever the plans say. It would depend on what the slab was for. Are you talking about a slab of meat or concrete?
Based on my experience, slab thickness made of concrete varies from 100mm to 200mm thickness. But most slab thickness are ranging from 100-125mm thk. The maximum reinforced slab that I encountered is250mm thickness which is designed as flat slab. meaning the slab is not supported by a beam or girder but is supported directly by columns.
The thickest slab I have constructed so far was a deckslab of a simply supported bridge and it was 50 cms thick. The span is more than 6.5 meters. The load conditions and other site specific conditions demanded such a thickness. Cage reinforcement was used for this slab - that is mesh reinforcement on all faces - bottom, top and the four sides.
I think there is no maximum limit for the slab thickness it depends upon the shear stress you have. but when the slab become thicker (as a job i was doing we let the slab thickness to be 1.5 m, yes i'm not wrog one and half meter because we had a theater without internal columns below and a normal floor with internal columns above in a 70 floors building) you have to consider that its a deep beam in design and to provide side bars.

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