Rebar Estimation Class: 17 (Slab on Grade) Part - 2

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  Slab Bolster & Slab Bolster Upper   Slab Bolster height = 2”   Length of Slab Bolster = 5+4 = 9’- 0”  Number of Slab Bolster = 200/9  = 22.22                                            = 23+1 = 24            No. of SB   =  150 -  (2 X ½ Spacing)                                          Spacing                             =  150  -   4                                       4                                            =  146 / 4                             =  36.5 + 1  = 38                         Total number of SB =  24 X 38                                   =  720 Nos.   Total linear feet = 720 X 5                            = 3600 L ft     Required = 720 Nos. 2” Height of SB (5’-0”) Length The total length of the Beam Bolster 3600’- 0” L ft         Individual high chair  ( I H C )            No. of IHC   =  200 -  (2 X ½ Spacing)                                          Spacing                             = 
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Reinforcement Estimation Rebar Class - 2

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 Shallow Foundation:

 

                  Width of footing > Depth of footing

 

They are classified as follows:

 

a)  Isolated footing or Column footing.

 

è     Square footing

è     Rectangular footing

è     Circular footing

 

Ø Supporting Individual column.


Ø Center of gravity of the column & Center of gravity of the footing lies on the same line.


Ø The resultant of all force acts along the centroid.

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