Software for estimation of construction works
Shaji K P
This article is about the softwares like Onscreen Takeoff and Autocad which are used in construction industry. I have also mentioned about how the software is usefull to draft and calculate the quantity for estimation in construction industry.
Many softwares are used in construction industry to increase the speed and accuracy of the work. Major field that uses the softwares are drafting, design, bidding and planning. AutoCAD is used to drafting,
for takeoff quantity, Primavera for planning, STADD for structural design. Calculation of quantity of project is known takeoff quantity in a construction industry.
Onscreen Takeoff software
This software is used in bidding department
to bid different project
with accurately and quickly. This software can use to calculate the quantity of different material like concrete, steel, tile etc very accurately and cost of material. Onscreen takeoff software can use to calculate the quantity and payment certification of ongoing project. We can download the software from internet. Also the some features are also limited to the trail version.
How to use Onscreen takeoff software for bidding
After installing the software, upload all the drawing sheet of a project in the database of Onscreen takeoff and give a name to the project. Then make measurement in the sheet required and the quantity can be view in takeoff sheet. Then put the price of each item in the worksheet tab. This sheet will give the total cost of the project. There are different tool
to measure the quantity
of different item likes door, tile etc. For example I will explain how to take the quantity of tile used for flooring. For this we will take area tool and mark in the floor drawing sheet. Mark all the area covered by the tile in the project. This quantity can view in the takeoffsheet. After giving the price of the project the total cost of tile work is ready. Similarly we can use count tool mark doors and windows and length tool to measure wall, wall base, boundary wall etc. Like take the quantity of all item in the project and put the cost of material, labor and mark up. This will give the price of whole project.
Advantage of OST
The advantage of this software is it is usefull to calculate the price accurately and quickly and all the drawing sheet can upload in the database. The output likes quantity and
price can be export to csv format
How to measure area and length using AutoCAD
AutoCAD is a popular software used for drafting. AutoCAD is very usefull for preparing the drawing in 2D and 3D. There are lot of tools in
that enable drawing. These are drawing tool and modification tool. First version released in 1982 by Autodesk. The latest version is 2013. Almost all field of engineering like electrical, mechanical and civil use this software. In civil engineering this software is very useful for drawing plan, elevation and section of buildings. Also this is used to prepare civil site plan. There are different tools in AutoCAD to draw sketches. They are drawing tools and modifying tools. The frequent used tools are line(l), poliline(pl), circle(c), rectangle, trim, etc. Modification tools are erase, offset, etc. Advantage of software in drafting is speed and accuracy. It is necessary to make manycopies of drawing in a construction. AutoCAD is very usefull to produce the copies with minimum effort.To measure quantity using thissoftware following tools are used. Length and area tools in
enquiry(Tools) are used to take measurement from cad drawing
PDF professional to quantity takeoff building material
This is a very usefull software to calculate accurately
quantity from PDF drawing for estimation purpose
. The measurement mark on the drawing sheet can export to excel sheet. Measuring tools in PDF are used. When you click length in measuring tool, a small window will appear and ask for scale and label. You can enter a scale value that will give correct measurement from drawing by comparing with existing dimensions marked in drawing. Label represents the building material item in the construction that we need to input before measurement. After marking in drawing with this tool, it can export to excel and edit. There area and perimeter tool to measure area and perimeter respectively.
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