GRAVITY GOODS ROPEWAY
5 ESTIMATING AND COSTING
5.1 Estimating
The quantities of materials is extracted from the
standard drawings as detailed in the working
drawings. The estimate will include but not
necessarily be limited to the following items:
A) Civil component
Site clearance
Earth work
Boulder soling
Masonry work in cement mortar (1:6)
Plain cement concrete (PCC) in 1:2:4
40 per cent plumb concrete in 1:3:6
Reinforcement steel
Truss post
Roofing materials (CGI sheet)
B) Mechanical component
Wire ropes
Structural steels
Machinery parts
Bearings
Shafts and sheaves
Brakes and braking systems
Connecting accessories – bull dog grips
and thimbles
Galvanisation
Refer to Dolidar/Suspension Bridge Division's
Norms (SBD) for quantity estimation and rate
analysis.
A sample of Bill of Quantities is shown in Annex
3. Changes to the provided format may be made
as per the engineer's own requirement.
5.2 Costing
After the quantity estimation, costing is done with
reference to the latest quotation rate, prevailing
market rates of materials and the approved
district rates. The cost of structural steel and
wire ropes are based on the latest quotation
rates obtained from the manufacturers or the
authorised dealers whereas the cost of the non-
local materials like cement, steel reinforcements,
CGI sheets should be consistent with the market
rates. The labour and local materials rate should
be analysed and confirmed to the approved
district rates adopted at the place of construction.
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