Estimators take building blueprints, either manual or digital software, then begin to ” takeoff components” that they will need from the blueprints to prepare a part of the estimation.
For example, when installing the plumbing system for a factory, they need the number of pipes or the number of flow control valves, reducers, or measuring devices. Takeoff is done by a variety of methods but there is some most common way.
- By manually from the blueprint drawings.
- Using the estimating software.
- Using digital- the electronic measurement equipment working on print plans.
In this article, we will show the outstanding point as well as limitations between takeoff components manually and takeoff by using the estimating software.
Takeoff manually from the blueprint drawings
Takeoff by using the estimating software
Nowadays, many software like Blue Sprint, Stack… available in the market. Allowing the estimator to measure accurately the number of different building materials. It ensures that you don’t count redundant ( or omitted) at any documents. In this way, you will avoid the loss or reduce profits in any phase.
The software helps to takeoff components easier. The PDF or Autocad DXF drawing may be entered directly into the software. Through digital tools, estimators can mark objects directly on the software. After finishing the material takeoff format, we just only need to export the data to the excel file once. These methods ensure the least amount of errors and also easy to use.
Contractors maybe feel quite interested in taking off components by using the estimating software. However, the current software just only supports in general, reduce some manual work such as determining the total amount of the needed materials. There are not any characteristic software for each field. For example, when working on P&ID objects, how to count the number of piping, valve, line number automatically in the drawing? In the next article, we will clarify the difference between the traditional method and the automatic method to takeoff components. Is there a separate software specifically for P&ID?