DETAILED ESTIMATES WINDOW IN AN EXISTING WALL

DETAILED ESTIMATES
WINDOW IN AN EXISTING WALL

We have learnt from the previous chapter, the methods of calculating various quantities. In this chapter, estimates of buildings have dealt in details, complete with Report, Specifications, Abstract of cost and Material statement. The rates applied for calculating the abstract of cost are the approved ones, as are in schedule or rates of Punjab & Haryana. The current premium above C.S.R. has also been incorporated in the rate. Before starting with Detailing, the few important points about estimating which should be known are as under: these points are common for any type of civil engineering structure.


IMPORTANT POINTS ABOUT ESTIMATING

(a) Before starting any estimate of building, road and bridge, it should be seen that the plans are fully dimensioned , inner and outer dimensions should be checked before starting the estimate to avoid complications later on.
(b) The estimate should be drawn sub-head-wise, to avoid omission of any item.
(c) The nomenclature of every item should be according to the sanctioned schedule of rates to avoid claims of the contractors later on.
(d) All items should be calculated in units, according to which the payment is to to be made (chapter on, units)
(e) A detailed report according to the sub-heads should be attached. This should be self explanatory giving complete information.

(f) Detailed drawings should be attached with every detailed estimate, with north line on the plan.
(g) Detailed specifications of every item should be attached so that the work should be carried out accordingly & the specifications should be according to the latest edition of the P.W.D. specifications.
(h) In order to make the estimate a comprehensive one, provision of electric & water supply should be made.
(i) In the end of estimate, an abstract of cost giving cost of every sub-head and total cost should be attached. A provision of contingencies & petty establishment @ 5% should be added in the end of abstract of cost.
(j) The rate per sq. metre should be worked out & it should be given in the end of abstract of the building estimate. This helps in future reference.
(k) In case of Road estimate, rate per Km. should also be worked out.
(l) The road estimate should mention the special features of the alignment so followed & also whether the soling is of bricks or of stone, should be mentioned in the report of estimate.
(m) In case of bridges & culverts, rate per metre (width) to be worked out.
(n) Current applicable premium above C.S.R. should be added before finding out the unit rate i.e., plinth or per km rate.



DATA REQUIRED FOR PREPARATION OF AN ESTIAMTE

1. Complete and fully dimensioned plans & sections of the work of question.
2. Detailed specifications, giving the nature and class of work and material to be used.
3. Rates for calculating abstract of cost. These should be approved ones. Premium above C.S.R., as prevailing at the time of finding cost should also be added.




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