Tuesday 29 April 2014

Saturday 26 April 2014

Estimation and Costing

PREPARATION OF ESTIMATES FOR CIVIL 
WORKS SUCH AS 
BUILDINGS,ROADS,FOOTPATHS,DRAINS 
AND CULVERTS,ETC


PREPARATION OF ESTIMATE FOR BUILDINGS
Lay out plan showing location of site
Plan , elevation & cross section
Verification of set backs , internal dimensions & FAR as per 
NBC / BBMP norms
Trial pit or trial bore details
Soil classification & SBC
Design details
Quarry map &lead statement
Report accompanying the estimate must be comprehens
ive , 
cogent and contain all the basic information
Rate analysis
Measurement sheet
Abstract sheet
Construction schedule

Preparation of estimate for roads
name of the road indicating chainage
Drawing showing L/S &C/S with all details
Subgrade soil details
Design details &intensity of traffic details
Life cycle cost that includes cost of construction & 
maintainance
Report accompanying the estimate justifying the work 
to be taken up
Estimate to be as per the IRC codes 


Estimation for footpaths
Minimum width of foot path is 1.5m,generally varies 
from 1.5m to 3m according to the intensity of 
pedestrain.
Footpath dimension should be as per norms laid down 
in NBC/ BBMP.
Kerbs 0f height 300mm is to be provided.
Good gravelly soil is to be filled up & compacted to the 
required density.
Turfing with local grass/paved with 40mm BS slab/paved 
with pcc tiles

Estimation of drains
Drawing showing the location of drain.
Drawing showing L/S & C/S of drain.
Design details considering hydrology.
Quarry map & lead statement.
Rate analysis.
Measurement sheet.
Abstract sheet.
Report justifying the necessity of drain.
To be verified with CPHEEO norms & NBC.
Extra cover for steel & sulphate resistant cement to be 
used


Estimation of culverts
the estimate should give a general abstract of cost 
under the following heads.
Preparatory works like site clearance, construction of 
site office, mobilisation, etc.
Foundations, substructure, & superstructure.
Protective works, approaches & miscellaneous items.
Contingencies & departmental charges.




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