Four Ways To Estimate Rebar – Methodologies

2020-10-30T20:08:52Z

Marlleegard: Created page with "As we know that cost of the concrete structure project depends on the amount of steel added and concrete. As steel is much expensive than concrete so its exact amount is much imp..."

As we know that cost of the concrete structure project depends on the amount of steel added and concrete. As steel is much expensive than concrete so its exact amount is much important as one can know beforehand the cost of the entire project. Following are the methodologies which are usually practiced during estimation of steel rebar.

Method 1:

You can make a rough estimate by using thumb rule that about 80 kg of rebar is required per cum. of slab. So if slab size is say 10m x 10m x 0.2m. Concrete = 10 x 10 x 0.2 = 20 cum. Therefore, Rebar = 80 kg x 20 = 1600 kg = 1.6 MT.

This method is often used to get a rough idea of the cost and weight of the steel that is used for the building construction.

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Method 2:

Another thumb rule can be used that 1% steel by volume of slab. So for above slab having volume = 20 cum.

Steel = 1% of 20 cum. = 0.2 cum = 0.2 x 7850 kg/cum = 1570 kg = 1.57 MT

The thumb rules for above 2 methods are based on your own experience. It may differ from one [http://www.biddingenterprise.com/ building] to another. Only after having enough data can you make a correct assumption of the thumb rules. It is better to take a thumb rule from a previously constructed building of similar nature to the one you are calculating now. This is also known as benchmarking.

Method 3: By measuring the quantity from the Drawings or from a BBS:

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This is more detailed method of measurement. 1st you have to measure the total length of the different diameters of bars by including the length of straight bars, lap lengths, bend bars etc. Then multiply the total lengths with the unit weight of the respective bars to get the total weight of steel.

E.g. Total length of 20 mm bars is 100 meters. Then Weight = Length x unit weight of 20 mm dia bar = 100 x 2.47 = 247 kg???s.

Method 4: By Using Estimation Software:

Using different estimation software???s like Plan Swift and Blue Beam also help us to obtain direct mass of the bar just by providing the area and spacing between the bars. The amount obtain by these software???s is usually exact or near to the exact amount and some waste material usually 5-10% of total weight calculated is applied and you will get the exact amount.

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Method 5: Using Online Calculators:

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You can use different online calculators to estimate the quantity of steel reinforcement.

Reference

[http://www.biddingenterprise.com/four-ways-to-estimate-rebar-methodologies/ http://www.biddingenterprise.com/four-ways-to-estimate-rebar-methodologies/]

[[Category:Research_/_Innovation]]

How Software Has Revolutionized Estimation

2020-10-29T21:06:02Z

Marlleegard: Created page with "Over the period of last decade or so, conventional methods of developing [http://www.biddingenterprise.com/ takeoffs] using pen & paper have been replaced with easy-to-use, p..."

Over the period of last decade or so, conventional methods of developing [http://www.biddingenterprise.com/ takeoffs] using pen & paper have been replaced with easy-to-use, powerful and time-saving computer aided estimation software.

* Companies who have adopted this change have edged past the competition in growth and profitability. These tools allow companies to work smarter and bid on more jobs in less time. We have adopted that change and have been helping construction industry to bid more and win more.

*

[http://www.biddingenterprise.com/ Const Estimating & Quantity TakeOffs]???s are computer software designed for contractors to estimate construction costs for a specific project. A cost estimator will typically use estimating software to estimate their bid price for a project, which will ultimately become part of a resulting construction contract. Some architects, engineers, construction managers, and others may also use cost estimating software to prepare cost estimates for purposes other than bidding.

With the advent of computers in business, estimators began using spreadsheet applications like VisiCalc, Lotus 1-2-3, and Microsoft Excel to duplicate the traditional tabular format, while automating redundant mathematical formulas

Revolutionary Benefits of using software???s in estimation are as follows:

1. Efficiency

Efficiency is one of the main benefits you???ll enjoy when using a digital estimation software. In fact, compared to all the other software products currently in use in your business, no other software will be able to save you time and money like estimating software. By improving the speed and efficiency of your estimating, you’ll be able to put more quotes out into the marketplace, win more jobs, and dedicate more time to other important areas of your business.

2. Accuracy

In a turbulent economy and competitive market, it has never been more crucial for you to keep track of your subcontractor expenses, actual labor costs, equipment costs, and material costs than it is today. It???s essential that you have the ability to track all your back orders, stored materials, and the ones that have already been installed in a recent build. Estimating software drives this accuracy, allowing you to establish the build???s closest true cost.

Estimating software is not only a powerful computing solution for these figures, but also empowers users to achieve greater accuracy for projects they intend to tender for. Additionally, it pinpoints your labor costs, and the total volume of materials that will be required for a project.

3. Consistency

When you use a construction estimating software, you will be able to form estimates that utilize similar procedures and expenses every time you have a new build. This ensures a consistent process across all projects.

Software also maintain a database of prices and costs that can be updated as needed, providing your estimator with tools they can use in future builds and avoid costly build overruns. These features make it possible to compare past projects, establish a construction time frame, and take advantage of streamlined systems and processes.

4. Integrations

With estimating software, you can integrate your work with other key software solutions for your business; giving you the ability to streamline your workflow, and reduce replication of data. Software integrates with a range of systems, to help you streamline your processes and make your work easier, including Microsoft Excel, Xero accounting software, Builder Trend project management software, and Mudshark earthworks estimating software.

5. Professionalism

Apart from providing you with accuracy, consistency, precision, and speed, estimating software will also take your overall professionalism to new heights. As a contractor operating in today???s competitive construction industry, it???s important that you don???t fall behind the pack by using outdated processes and cumbersome technology.

Producing professional quotes and reports will give your customers an extra degree of confidence in your business. Software allows you to generate a range of customizable reports, so you can include the specific information you need, and personalize it to match your unique brand.

Advancement in Estimation Process:

With the advancement in technology many estimation software like Plan Swift, Blue Beam etc. are used to estimate the different types of projects that not only allow us to estimate the project quickly but efficient also. Further errors in making calculation also eradicated due to use of these software???s. Different software???s also allow us to export the excel file making calculation easier and error free.

No doubt, estimation software???s revolutionized the estimation procedure and making it beneficial for the estimators to estimates the exact estimate of the project. Software also allow us to take off the exact area, length, volume and rebar calculation and thus allowing making more profit.

Reference:

1. [http://www.biddingenterprise.com/3964-2/ Estimation in Building Construction 7th Edition by Frank. R. Dagostino Steven J. Peterson]

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Four Ways To Estimate Rebar – Methodologies

How Software Has Revolutionized Estimation