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CPWD Analysis of Rates · Drainage

Extra for depth of manholes dismantled

Rectangular arch type manhole 140x90 cm and beyond 2.45 m depth (up to 4.25 m depth)

CPWD DAR 2023›Drainage
Item number
19.25.3
Analysis basis
Details of cost for 1.80 metre
Priced inputs
2
Derived rate
₹1,975.85 / metre

Under the CPWD Delhi Analysis of Rates 2023 (Civil), item 19.25.3 — Extra for depth of manholes dismantled : Rectangular arch type manhole 140x90 cm and beyond 2.45 m depth (up to 4.25 m depth) — is derived from 2 priced inputs for 1.80 metre and works out to ₹1,975.85 per metre after water charges, GST, CPOH and cess. The full build-up is below.

  • Dismantling IInd class brick work in
  • cement mortar 1:4 (1 Cement : 4 Coarse
  • sand) for 2.45 depth
  • Qty for 2.45m depth
  • 5.52mx0.23mx1.20m = 1.524 cum
  • 3.92mx0.23mx1.15m = 1.037 cum
  • Total = 2.561 cum
  • 2x½x3.14x0.25mx0.23x0.1m = 0.018
  • cum
  • 2x3.14/4(0.15)²x0.23m = 0.008 cum
  • Total deduction= = (-) 0.026 cum
  • Net 2.561 - 0.026 = 2.535 cum Say 2.54
  • cum
  • Qty in arch
  • ½x3.14x1.13x0.80x0.23m = 0.327 cum
  • 2x½x3.14x0.25mx0.23x0.1m = 0.018
  • cum
  • Total = 0.345 cum Say 0.35 cum
  • Totol for 4.45 m depth 2.54 + 0.35 = 2.89
  • cum
  • Qty for 4.25m depth
  • 5.52mx0.23mx1.20m = 1.524 cum
  • 3.92mx0.23mx2.95m = 2.660 cum
  • Total = 4.184 cum
  • 2x½x3.14x0.70mx0.23x0.1m = 0.051
  • cum
  • 2x3.14/4x(0.60)²x0.23 = 0.130 cum
  • Total deduction== (-) 0.181 cum
  • Net 4.184 - 0.181 = 4.003 cum Say 4.00
  • cum
  • Qty in arch
  • ½x3.14x1.13x0.80x0.23m = 0.327 cum
  • 2x½x3.14x0.70mx0.23x0.1m = 0.051
  • cum
  • Total = 0.378 cum Say 0.38 cum
  • Total for 2.25 m depth = 4.0+ 0.38 =4.38
  • cum
  • Net difference = 4.38 - 2.89 = 1.49 cum
  • Dismantling cement concrete 1:2:4 (1
  • Cement : 2 coarse sand : 4 graded stone
  • aggregate 40mm nominal size)
  • Qty for 4.25m depth
  • 2x1.4x(0.90/2)x(0.65+0.75)/2 = 0.882
  • cum
  • cum
  • = 0.486 cum Say 0.49 cum
  • Qty for 2.45m depth
  • 2x1.4x(0.90/2)x(0.20+0.30)/2 = 0.315
  • cum
  • cum
  • = 0.290 cum Say 0.29 cum
  • Net difference = 0.49 - 0.29 = 0.20 cum
  • Deduct arch ring and portion of pipe
  • Deduct arch ring and portion of pipe
  • Less pipe :1.4x3.14/4x(0.60)²(-) = 0.396
  • Less pipe :1.4x3.14/4x(0.15)²(-) = 0.025
CodeInputUnitQuantityRate (INR)Amount (INR)
Rate as per item no. 15.7.4 of SH :dismantling and dimolishingRate as per item 15.7.4Sub-analysiscum1.492,060.203,069.70
Rate as per item no 15.2.1 of SH : Demolishing and dismantlingRate as per item 15.2.1Sub-analysiscum0.22,434.25486.85
Cost for 1.8 metre depth
3,556.55
Cost for 1 metre depth
1,975.86
Say
1,975.85

From the CPWD Delhi Analysis of Rates 2023 (Civil), Volumes I & II, printed page 1759. Reference only — CPWD amends rates through correction slips between editions, so verify against the official source before pricing a bid.

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