QTO hung whenever I tried a Model Takeoff. Managed to import (after a couple of hours) after exporting again using. The first attempt was exported from a Revit Arch 2009 project that consisted of (5) linked projects ranging in size from 12MB to 124MB. Moved to a faster desktop (quad core) with 8GB memory running Vista Ultimate 64-bit. I started using QTO on a fast laptop running XP Pro w/2GB memory. Two days of unsuccessful attempts to process DWFs from a 240MB project are leading me to believe that QTO as a product is not ready for primetime.įirst I created a 3D DWF and a 2D DWF with (18) sheets representing the (18) floor plans. QTO worked fine with 2D and 3D dwfs exported from a relatively small (45MB) project when we tested the product before purchase.
In a logical order, these documents refer to the following subjects:Cost Estimating 21 Dr.I've been attempting to use QTO to produce a takeoff from a Revit Arch 2009 model, without much success. The material quantity takeoff is extremelyimportant for cost estimating because it often establishes the quantity and unit of measurefor the costs of labor and contractor’s equipment.2.1.1 Contract documentsThe contract is defined by the contract documents, which are developed from the tenderdocuments. Theestimator must, also, add an appropriate percentage for waste for those items where wasteis likely to occur during construction. A wellorganizedcheck-list of work will help reduce the chances of omitting an item. Each estimator must develop a system ofquantity takeoff that ensures that a quantity is not omitted or calculated twice. The estimate contingencies for programming purposes reflect theestimate confidence.2.1 Importance of Quantity Takeoff and Required DocumentsThe 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 materialand record the amount and unit of measure.
An accurate and complete estimate establishesaccountability and credibility of the cost engineer, therefore, providing greater confidencein the cost estimate. Accuracy and completeness arecritical factors in all cost estimates. Use ofappropriate automation tools is highly recommended. It must be as accurate aspossible and should be based on all available engineering and design data. CHAPTER 2QUANTITY TAKE-OFFThe quantity “takeoff” is an important part of the cost estimate.
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