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The minimum covering of reinforcement for roof slab is 30mm
Supended slab are slab not sit on the ground directlySuspended slab is a slab supported by beams.
1. one way slab 2. two way slab 3. flat slab 4. roof slab
A solid slab is a reinforced concrete slab which is supported by beams or walls..
when the length of the slab is more or equal to twice the breadth hence it has to be one way slab.
The minimum covering of reinforcement for roof slab is 30mm
The minimum area of steel required in RCC slab as per BS code is 0.12 to 0.15% of total area. The maximum diameter of bar in slab, shall not exceed D/8, where D is the total thickness of slab.
upto 160000 -Nil 160000 to 500000 10% 500000 to 800000 20% 800000 and above 30% upto 1.6 lakh NIL 1.61 lakh to 3.0 Lakh 10% 3.01 to 5.0 Lakh 20% > 5.0 lakh 30%
A 22x22 foot slab at a 4-inch thickness/depth requires a minimum of 6 cubic yards.
Minimum of 18" by Code.
You will need a minimum of 2.96 cubic yards.
Since most flat slabs contain reinforcing steel, the minimum would be the thickness required to cover the steel, generally 2" top and bottom. But the real answer depends on what the slab is supporting and the level of safety required. For a very general situation where the slab is supported on all sides and not significantly longer in one direction, a slab can be 6" wide and support light loading if properly reinforced.
A minimum of 1.23 cubic yards at 4" thick.
A minimum of 5.93 cubic yards is needed.
4" or 102 mm of compacted sand or gravel fill.
You will need a minimum of 74.1 cubic yards.
A minimum of 1.3 cubic yards.