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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Rebar Estimation Class: 15 (Grade Beam Part - 4)

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 Beam Bolster Type 1


Beam length = 400’-0” lft

Cover           = 3” inches

2#6 Continuous Top & Bottom

Beam Bolster Length = 5’-0” @ 48” O.C

  

BB = Total length of the beam / 9’-0”

      = 400 / 9

      = 44.44   (45+1 = 46)

      = 46 x 2

      = 92

 

  Total number of BB X 5’-0”

           = 92 X 5    = 460’-0”

 

Required = 92 Nos

3” Height of BB 5’-0” Length

The total length of the Beam Bolster is 460’-0” lft

 

  

 

Beam Bolster Type 2


Beam length = 400’-0” lft and Beam width = 1’-0”

Cover           = 3” inches

2#6 Continuous Top & Bottom

#3 @ 12” O.C Stirrups

Beam Bolster Length = 5’-0” @ 48” O.C

 

 Beam bolster height

 H = 3”+ 0.375”

    = 0.25’ + 0.03125’

    = 0.28’

  H = 3-3/8”

 

 BB = Beam length / 4’-0”

      = 400 / 4  = 100  ~ 101

  

T.L BB    = no of BB X Beam width

    = 101 X 1

    = 101 ~ 102’-0”

 

The total length of bb / 5’

= 102 / 5

= 20.4 ~ 26 nos

 

Required = 26 Nos

3-3/8” Height of BB (5’-0” / 1’-0” [102] ) Length

The total length of the Beam Bolster 102’-0” lft

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