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    Quantity Estimation OHSR

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    Prashant Garg
    The document compares the quantity of materials used for the foundation slab between the revised and standard drawings for a construction project in Ropar. It finds that the revised drawing requires 271.51 kg more rebar, 3.773 cubic meters more concrete, and 1.416 cubic meters more PCC compared to the standard drawing. The total estimated cost difference due to these additional materials is Rs. 35,900.

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    Quantity Estimation OHSR

    Uploaded by

    Prashant Garg
    235 views4 pages
    The document compares the quantity of materials used for the foundation slab between the revised and standard drawings for a construction project in Ropar. It finds that the revised drawing requires 271.51 kg more rebar, 3.773 cubic meters more concrete, and 1.416 cubic meters more PCC compared to the standard drawing. The total estimated cost difference due to these additional materials is Rs. 35,900.

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    OHSR estimate

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    quantity estimation OHSR

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    The document compares the quantity of materials used for the foundation slab between the revised and standard drawings for a construction project in Ropar. It finds that the revised drawing requires 271.51 kg more rebar, 3.773 cubic meters more concrete, and 1.416 cubic meters more PCC compared to the standard drawing. The total estimated cost difference due to these additional materials is Rs. 35,900.

    Copyright:

    © All Rights Reserved
    Download as DOCX, PDF, TXT or read online from Scribd
    Download as docx, pdf, or txt
    235 views4 pages

    Quantity Estimation OHSR

    Uploaded by

    Prashant Garg
    The document compares the quantity of materials used for the foundation slab between the revised and standard drawings for a construction project in Ropar. It finds that the revised drawing requires 271.51 kg more rebar, 3.773 cubic meters more concrete, and 1.416 cubic meters more PCC compared to the standard drawing. The total estimated cost difference due to these additional materials is Rs. 35,900.

    Copyright:

    © All Rights Reserved
    Download as DOCX, PDF, TXT or read online from Scribd
    Download as docx, pdf, or txt
    of 4

    DIFFERENCE IN QUANTITY OF FOUNDATION SLAB DUE TO LESS BC AT RASIDPUR BLOCK

    CHAMKAUR SAHIB, ROPAR

    Total quantity of material in Revised Drawing ( SBC=6.25t/m2)


    Rings Bars (10 mm Dia)

    Average length of one bar: = 2x3.14x 2.37 = 14.89 m

    No of Total rings (10+10) = 20

    Total Length of bars = 20x14.89 = 297.8m

    Total Weight of bars = 297.8x 0.62 = 184.64 Kg

    Extra (Waste+ lap etc.) @10% = 18.5 kg

    Total 10 mm diameter bars required = 203.14 kg

    Radial Bars ( 12 mm Dia)

    Length of radial bar = 2.46 m

    No of total bars = (2x3.14x2.37/.125) = 120 bars

    Total length of radial bars = 2.46x120 = 295.2m

    Total weight of bars = 0.89x 262.73 = 262 Kg

    Extra (Waste+ lap +hook etc.) @10% = 26.2 kg

    Total 10 mm diameter bars required = 288.2 kg


    Concrete (M-25)

    Inside of foundation beam = 2x3.14x( 2.145+1.14)/2 x .35x1.005= 3.629 m3

    Outer of Foundation beam = 2x3.14x(2.595+3.6) x(.35+.3)/2 x1.005=6.354 m3

    Total Concrete used in foundation slab = 9.983 m3

    PCC

    Volume of PCC = 3.14x(7.52-2.082)x.15/4 = 6.114 m2

    Total quantity of material in Standard Drawing ( SBC=8.75t/m2)


    Rings Bars (10 mm Dia)

    Average length of one bar: = 2x3.14x 2.37 = 14.89 m

    No of Total rings (4+4) = 8

    Total Length of bars = 8x14.89 = 119.12m

    Total Weight of bars = 119.12x 0.62 = 73.85 Kg

    Extra (Waste+ lap + hook etc.) @10% = 7.385 kg

    Total 10 mm diameter bars required = 81.235 kg

    Radial Bars ( 12 mm Dia)

    Length of radial bar = 1.9 m

    No of total bars = (2x3.14x2.37/.2) = 75 bars

    Total length of radial bars = 1.9 x 75 = 142.5m


    Total weight of bars = 0.89x 142.5 = 126 Kg

    Extra (Waste+ lap etc.) @10% = 12.6 kg

    Total 10 mm diameter bars required = 138.6 kg

    Concrete (M-25)

    Inside of foundation beam = 2x3.14x (2.145+1.395)/2 x .33x.75 = 2.75 m3

    Outer of Foundation beam = 2x3.14x (2.595+3.245) x(.33+.25)/2x.65 = 3.46 m3

    Total Concrete used in foundation slab = 6.21 m3

    PCC

    Volume of PCC = 3.14x(6.792-2.492)x.15/4 = 4.698 m2

    Comparative Statement of material quantity:

    Materials As per Standard Dwg. As per Revised Dwg. Difference


    Rebars (Kg) 81.235 +138.6 = 219.83 kg 203.14+288.3= 491.34 kg 271.51 kg

    Concrete 6.21 m3 9.983 m3 3.773 m3


    (M-25) (m3)

    PCC 4.698 m3 6.114 m3 1.416 m3


    Estimation:

    S.N Item CSR Item no. CSr(2010) Current Rate of Estimated Units Cost of
    o base rate, sanctioned activity quantities Activities, Rs
    Rs premium at
    as per quoted
    11/12/201 premium,
    3,% Rs
    1 RCC Work 10.22, providing cement concrete M-25 hand 3980.97 28 5095.51 3.773 cum 19225.36
    mixed excluding rebar centring and
    shuttering
    10.46, extra for mechanical mixer used by 48 18 56.64 3.773 cum 213.71
    contractor at his own cost
    10.47, extra for vibrator used by contractor at 160 18 188.80 3.773 cum 712.35
    his own cost
    2 Reinforcin 18.18, CTD/TMT bars of FE 500D grade as 5166.94 16 5993.65 2.72 Qty. 16302.7
    g Steel per Is 1786 Latest for RCC work where not
    include in complete rate of RCC including
    bending, placing in position complete
    3 PCC 10.12, 150 mm soffit of beams, footing 330.21 26 416.06 1.416 cum 589.14
    edges
    Total of all activities 34043.26
    Adding unforeseen/ mislanious item @ 5% 1852.16
    Grand Total 35895.42 =
    35900 say
    Total amount difference = Rs. 35900-/- (Thirty five thousand nine hundred only)

    Dr. Prashant Garg


    GNDEC, Ludhiana

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