RCC work :-
1)Minimum no of bars For square column or rectangular = 4 bars
2)Minimum no of bar For circular column = 6 bars
3)Standard sand in india is obtained from Ennore
4)1 Yard = 3 feet
5)Weight of steel bar= D2/162.2 kg/m
6)Weight of steel = D2/533 kg / ft
7)Slope of staircase = 25degree to 40 degree
8)Size of concrete testing cube = 150x150x150 mm
9)Concrete cube is filled in = 3 layers
10)Slump cone is filled in = 4 layers
11)Cement should be used within three months of manufacturing.
12)Minimum thickness of shear wall = 150mm
13)Maximum thickness of shear wall = 400mm
14)Universal testing machine is used for compression test of concrete tensile test of steel reinforcement.
15)Minimum curing period
7 Days Normal weather condition
10 Days not weather condition
16)Minimum percentage of steel column = 0.08 % of cross area
17)Max % of steel in column = 6% of gross area
18)Nominal Cover
Footing = 50mm
Column = 25-40mm
Slab = 15-20mm
Beam = 25mm
19)Lapping is not allowed in bars of diameter 36mm or more welding is preffesed.
20)No.of stirrups in beam = clear span/c/c/ spacing + 1
22)R.C.C is affected by water because of corrossion of reinforcement bars.
23)P.C.C is not affected by the water.
24)Height of Parapet wall should be = 1m
25)Thickness of DPC = 2.5cm OR 1 inch
26)Height of Building Floor = 3.15m
27)Height of Window = 2.1m
28)One bag of cement = 1.25cubic feet and 0.0347 m3
28)Weight of one cement bag = 50kg
29)Minimum thickness of slab = 110mm
30)No.of cement bags in 1m3 = 28.8bags
31)Lintel thickness = 15cm (min)
32)Lintel is provided at = 2.4 m in case of Brick wall
33)Minimum diameter of bars used in slab = 8mm
34)Minimum diameter of bars used in column = 12mm
35)Minimum diameter of bars in Dowel bars = 12mm
36)Maximum diameter of bars in slab = 1/8 x thickness of slab
37)Maximum chair spacing = 1m
38)Dimensional tolerance of cube = +2mm -2mm
39)Maximum water absorption of first class brick = 15% of dry Weight.
40)Initial setting time of cement = 30 minutes.
41)Final setting time of cement = 10 hrs (600 minutes)
42)DPR = Detailed project report.
Unit Weight:-
1) RCC = 25 kn/m3 = 25000N/m3
2) PCC = 24 kn / m3 = 24000 N/m3
3) Steel = 7850 kg/m3
4) 1 Gallon = 3.78 liters
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