Procedure for preparation of detailed estimation and costing of agriculture structural building

a) Analysis of estimation:

• Prepare a full dimensional drawing of the structure showing the plan sectional elevation and the section of different parts.
• Obtain the specification of each element o the structure giving type of material used, their quantity and properties.
• Take the measurements including l, b, h of each component of the structure and tabulate them.

• Estimate the quantity of different materials required to the construction of a particular component of a structure. Eg. Cement, sand, gravel, steel bar etc.
• Based on the material estimate for each component of the structure prepare a summary of different types of construction materials and their quantity required in the construction of the structure

b) Analysis of cost procedure:

After the estimation of the different materials required for the construction as above mentioned the cost analysis is done:

• Based on the labor types and output of work estimate the amount (man day) of labor required in the executing work.
• Estimate the transport cost, cost of equipments and tools, sundries cost, cost of miscellaneous items if any. [Sundries cost : cost of wares, electricity, warehouse charge. ]
• Obtain the rates of different types of construction materials and labor from the schedule of the rates.
• Workout the cost of each item of work by multiplying the quantities of each item with the rate of that items and tabulates them.

c) Analysis rates or cost:

• The determination of rate per unit of a particular item of work from the cost of quantities of materials, the cost & labor & other expenses required for its completion is known as analysis of rate.
• A 10 % reasonable profit for the contractor is also included in analysis of rate. It also includes the cost of construction materials; cost of transport, cost of tools, cost of labor.
• The cost of each item can be determined by multiplying the quantities of each item with the rate of item.

Cost of item = Quantity of item x rate of items

• The analysis of rate is usually worked out for the unit of payment of particular item of work under 2 headings: Material and labor.
• The cost added together gives the cost of item work.
• The cost of material is plan as delivered at site inclusive of the transport, taxes, other charges (10 % contractor profit, 1.5% water charges, transport charge etc.)
• In working out analysis of rates labor has been taken on daily wages bases for 8 hours working day.
• When the full day for a particular labor is not required one labor has to work a part of day in such cases part labor of labors has been taken in account. For ag. One labor for half day is equivalent to the half labor per day.
• Labor is necessary to work physically or to execute the assigned task. They may be categorized as skilled and unskilled.