1) Minimum Spacing of Chair 1 m c/c
2). Minimum Dia of Chair 12mm Dia
3). After How Many Days Cement Will not to use for RCC Work - 3 Month, after That it will be used for only PCC, Plaster and Non- Bearing Load Structures
4). Bend Deduction for 90 Degree for one bend is - 2D , Where D = Dia of Bar
5). Bend Deduction for 45 Degree Bend is 1D
6). Bend Deduction for 135 Degree is 3D
7). Minimum No. Of Bars in Rectangle Column is 4 Nos. & Circular Column is 6 Nos.
8). Density of Mild Steel Bar is 7850 Kg/cum.
9). Density of sand 1450 Kg/cum.
10. Bend Deduction for 180 Degree Bend is 4D
11). Size of concrete cube for Compressive strength Test is 150x150x150
12). Concrete Cube Strength = Load/Area
13). Weight of Steel Bar/Meter = (Dia of Bar)/ 162.2
14). How to calculate volume of one bag cement
Volume= Weight/Density = 50/1440= 0.03472 cum.
15). Density of Cement is 1440 Kg/cum.
16). Volume of cement bag in Cubicfeet = 0.03472x35.28= 1.225
17). Bond Strength of Anchorage Bars = Load (in Ton) x 1000/(2*pi*r*Anchorage Length). Kgf/cm^2
18). Least Count of Leveling Staff is 5mm
19). Thickness of GSB (Granular Sub-Base) in Road is 220mm
20). Thickness of WMM (Wet Mix Macadam) is 250mm
21). How to Calculate Camber in road construction
Camber% = (Height Difference x100)/Width of Road from Center
22). Surface Tolerance of DBM and BC Layer is 6mm
23). Surface Tolerance of WMM Layer is 10mm
24). Size of sieves for sand gradation 4.75mm, 2.36mm, 1.18mm, 600micron, 300micron, 150micron, 75micron
25). Number of Bars = (Clear Length/Spacing)+1
26). Weight of Bar in Kg. = Length(m) x Cross Sectional Area of Steel Bar (m) x 7850
27). Standard size of Bricks is 200x100x100mm
28). Ratio of Concrete Grades
M7.5 - 1:4:8
M10 - 1:3:6
M15 - 1:2:4
M20 - 1:1.5:3
M25 - 1:1:2
M = Mix
7.5,10,15,20,25 is 28 Days Strength in - N/mm^2
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