ANALYSIS OF RATE FOR SOIL EXCAVATION UPTO 2.0 METER DEPTH MANUALLY i.e. Manual excavation of soil below ground level in foundation, trenches, walls, columns, line leakage etc. in all types of soil including soft & hard murram, wet soil etc. except rock and hard rock up to a depth of 2.0 meter, dressing of sides and ramming of bed, spreading, levelling, compacting in plinth and disposal of surplus excavated soil as per the specifications and as directed by engineer with the lead of 5.0 KM.
To analyze the rate for manual excavation of soil up to 2.0
meters depth, the following components should be considered:
1. Scope of Work
- Excavation
of soil up to 2.0 meters depth manually.
- Types
of soil: all types (except rock and hard rock) including soft & hard
murram, wet soil, etc.
- Dressing
of sides and ramming of the bed.
- Spreading,
leveling, and compacting in plinth.
- Disposal
of surplus excavated soil within a 5 km lead or within plant boundary.
2. Components of Rate Analysis
A. Labor Cost
- Excavation
Labor: Skilled and unskilled laborers required for manual excavation.
- Number
of workers per cubic meter of excavation (considering productivity rates
as per standard norms or site conditions).
- Wage
rates for workers (daily wage or hourly rate based on local standards).
B. Tools and Tackles
- Hand
Tools: Spades, picks, crowbars, baskets, etc.
- Cost
per day or per job and depreciation cost of tools.
C. Disposal of Soil
- Transportation
Cost:
- Cost
of moving surplus soil up to 5 km using a vehicle or manual cartage.
- Fuel
and vehicle maintenance for transportation.
- Labor
for loading and unloading.
D. Overheads and Profit
- Contractor's
Overheads: Administrative and operational costs.
- Profit
Margin: Typically ranges from 10–20%, depending on local practices and
contractor discretion.
E. Miscellaneous Costs
- Compaction
Equipment or Manual Compacting: If manual compacting is required.
- Provision
for Wet Soil Handling: Additional labor or tools to handle wet or
waterlogged soil.
3. Steps to Calculate Rate
- Calculate
Volume: Estimate the volume of soil to be excavated (in cubic meters).
- Estimate
Labor Cost:
- Determine
the number of laborers required per cubic meter.
- Multiply
by the wage rate and total volume.
- Add
Tools Cost:
- Allocate
a proportionate cost of tools per cubic meter.
- Add
Disposal Cost:
- Calculate
the transport cost for the surplus soil per cubic meter based on lead
distance and transport mode.
- Add
Overheads and Profit:
- Include
a percentage of the total cost for overheads and profit.
- Adjust
for Local Variations:
- Consider
local rates, soil conditions, and other project-specific factors.
4. Example Calculation
Assume:
- Excavation
rate: 0.5 cubic meters per labourer per day.
- Wage
rate: Rs.10 per day.
- Volume:
1 cubic meter.
- Transport
cost: Rs.2 per cubic meter.
- Tools
cost: Rs. 0.5 per cubic meter.
- Overheads
and profit: 15%.
Calculation:
- Labor cost = (1.0cum)/(0.5 cum/day×Rs.10/day)=Rs.20.00
- Tools
cost = Rs.0.5
- Transport
cost = Rs.2.00
- Subtotal = 20+0.5+2=Rs.22.50
- Add Overheads & Profit = Rs.22.50×15%=Rs.3.375
- Total rate per cubic meter = 22.50+3.375=Rs.25.875
5. Key Considerations
- Soil
type and manual labor productivity significantly impact costs.
- Actual
rates may vary due to local wage laws, soil conditions, and market
fluctuations.
- Disposal
lead distance should be verified, as longer distances increase costs.
This framework provides a structured way to analyze and determine the rate for manual soil excavation.
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