Detial process of learning construction takeoff
The quantity “takeoff” is an important part of the cost estimate. It must be as accurate as
possible and should be based on all available engineering and design data. Use of
appropriate automation tools is highly recommended. Accuracy and completeness are
critical factors in all cost estimates. An accurate and complete estimate establishes
accountability and credibility of the cost engineer, therefore, providing greater confidence
in the cost estimate. The estimate contingencies for programming purposes reflect the
Importance of Quantity Takeoff and Required Documents
The quantity of material in a project can be accurately determined from the drawings.
The estimator must review each sheet of the drawings, calculate the quantity of material
and record the amount and unit of measure. Each estimator must develop a system of
quantity takeoff that ensures that a quantity is not omitted or calculated twice. A wellorganized
check-list of work will help reduce the chances of omitting an item. The
estimator must, also, add an appropriate percentage for waste for those items where waste
is likely to occur during construction.
The most important document from the legal point of view is the agreement. It is
sometimes called the contract. Since so many documents are included as contract
documents, the agreement is the better term for this particular one. The form of the
agreement can be standardized and used for many projects, or a unique document can be
prepared for each project. The standard form of agreement prescribed by the American
Institute of Architects has proved to be satisfactory and has been used on many building
projects with good results. The form followed for non-building projects is often more
varied. Man: agencies have own standard forms, which are used on all their projects.
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