Home | | **Estimation and Quantity Surveying** | Estimate of Buildings: Requirements Of Estimation And Costing

Estimate gives an idea of the cost of the work and hence its feasibility can be determined i.e. whether the project could be taken up with in the funds available or not.

**REQUIREMENTS
OF ESTIMATION AND COSTING **

1. Estimate gives an idea of the cost of the work and hence its
feasibility can be determined i.e. whether the project could be taken up with
in the funds available or not.

2. Estimate gives an idea of time required for the completion of
the work.

3. Estimate is required to invite the tenders and Quotations and to
arrange contract.

4. Estimate is also required to control the expenditure during the
execution of work.

5. Estimate decides whether the proposed plan matches the funds
available or not

.

**1 PROCEDURE OF ESTIMATING OR METHOD OF ESTIMATING.**

Estimating involves the following operations

1. Preparing detailed Estimate.

2. Calculating the rate of each unit of work

3. Preparing abstract of estimate

**2.DATA REQUIRED TO
PREPARE AN ESTIMATE **

1. Drawings i.e. plans, elevations, sections etc.

2.
Specifications.

3.
Rates.

**3 DRAWINGS**

If the drawings are not clear and without
complete dimensions the preparation of estimation become very difficult. So, it
is very essential before preparing an estimate

**4.SPECIFICATIONS
**

a) General Specifications: This gives the nature, quality, class
and work and materials in general terms to be used in various parts of wok. It
helps no form a general idea of building.

b) Detailed Specifications: These gives the detailed description of
the various items of work laying down the Quantities and qualities of
materials, their proportions, the method of preparation workmanship and
execution of work.

**5.RATES **

For preparing the estimate the unit rates of each item of work
are required.

1. for arriving at the unit rates of each item.

2. The rates of various materials to be used in the construction.

3. The cost of transport materials.

4. The wages of labor, skilled or unskilled of masons, carpenters,
Amador, etc.,

**6.LUMPSUM **

While preparing an estimate, it is
not possible to work out in detail in case of petty items. Items other than
civil engineering such items are called lump sum items or simply L.S.Items.

The following are some of L.S. Items in the estimate.

1. Water supply and sanitary arrangements.

2. Electrical installations like meter, motor, etc.,

3. Architectural features.

4. Contingencies and unforeseen items.

In general, certain percentage on
the cost of estimation is allotted for the above L.S.Items Even if sub
estimates prepared or at the end of execution of work, the actual cost should
not exceed the L.S.amounts provided in the main estimate.

**7 WORK CHARGED ESTABLISHMENT:**

During the
construction of a project considerable number of skilled supervisors, work
assistance, watch men etc., are employed on temporary basis. The salaries of these
persons are drawn from the L.S. amount allotted towards the work charged
establishment.

That is,
establishment which is charged directly to work. AnL.S.amount of 1½ to 2% of
the estimated cost is provided towards the work charged establishment.

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