Umair Gaines
An electrical takeoff is a critical step in developing an accurate estimate for a construction project. It involves identifying and quantifying all the electrical components required, from branches and feeders to functional devices and lighting fixtures. While there is no set sequence for performing an electrical takeoff, consistency in measuring and counting symbols on plans can help streamline the process and reduce errors. This step also requires an orderly, organised, and methodical routine, utilising proper forms, coloured pencils or pens, and a counter. Electrical takeoff software has gained popularity due to its ability to streamline processes, minimise errors, and save time, although it may not always be foolproof. Developing a keen eye for detail and double-checking project documents are essential to ensuring accurate electrical takeoffs.
| Characteristics | Values |
|---|---|
| Purpose | To provide a quick overview of the job and ease you into the estimate |
| Procedure | Identify and quantify all electrical components required for a construction project, including branches, feeders, and functional devices |
| Consistency | Maintain consistency when measuring and counting symbols on plans to reduce estimation time and errors |
| Sequence | No set sequence, but options include one section/page at a time or starting at the utility service location and working through feeders, branch circuits, and lighting fixtures |
| Tools | Rulers or scaling tools for manual measurement, colored pencils or pens for identification, and forms or sheets for recording |
| Estimation | Consider labor costs, material pricing, and equipment requirements; use past projects for reference |
| Profit and Overhead | Add profit and overhead to direct costs to determine the sales price; overhead includes indirect expenses like office lease, estimating, sales, marketing, and bookkeepers |
| Accuracy | Double-check project documents before takeoff to avoid inconsistencies, missing information, or errors; use digital takeoff software to streamline the process and minimize errors |
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What You'll Learn
Understanding the scope of the project
To understand the scope of the project, it is essential to start by reviewing the project plans and specifications in detail. This includes both architectural and electrical drawings, which provide valuable information about working heights, elevations, and technical details. By carefully studying these documents, you can gain insights into the construction style, such as whether it is residential, commercial, or industrial, as this will impact the type of estimating forms or worksheets used. For instance, worksheets for determining lighting requirements differ from those used for recording feeder and service equipment needs.
Consistency is key when measuring and counting symbols on the plans. Using coloured pencils or pens to identify each item being measured or counted ensures a clear representation of the electrical work required. This method reduces errors and helps in developing an accurate estimate. It is also important to cross-reference the drawings with the circuit layout and wiring configuration. If this information is not readily available, it must be determined before measuring the circuit wiring.
While there is no set sequence for performing the takeoff, consistency in your approach will streamline the process. One effective method is to tackle one section or page at a time, focusing on a single floor's wiring before moving on. Alternatively, you can start at the utility service location and work through the feeders, branch circuits, and lighting fixtures. However, this method can be time-consuming and require frequent page navigation.
Finally, it is beneficial to have a second pair of eyes review your work. A team member can take off the project's major systems, ensuring nothing was missed during the initial takeoff. Maintaining a bid log or a record of successfully completed projects can provide valuable reference points for estimating new projects.
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Manual measurement and calculation
Firstly, direct measurements of all electrical components are taken from paper plans using rulers or scaling tools. This step ensures precise dimensions for the calculations that follow. Next, lengths, quantities, and material requirements are calculated by hand. This stage is crucial for determining the amount of material needed and can be complex, especially for large-scale projects. It is essential to be consistent in your calculations to maintain accuracy and facilitate the estimation process.
The next step is to document all the takeoff calculations on a dedicated sheet, creating a reference point for building estimates. This documentation is essential for manual takeoffs and provides a tangible record of the project's electrical requirements. While manual takeoffs are less common nowadays, they are still valuable, especially when dealing with small-scale or straightforward projects that don't warrant the use of specialised software.
It is worth noting that manual takeoffs can be prone to errors and may not always account for all electrical components. As such, modern digital takeoff software has become the preferred choice for most estimators, offering increased efficiency, accuracy, and speed. However, even with software, it is beneficial to have a basic understanding of manual measurement and calculation techniques to address any unique project challenges.
In conclusion, while the electrical takeoff process has evolved with digital advancements, the fundamentals of manual measurement and calculation remain essential for electrical contractors to ensure accurate estimates and successful project execution.
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Using digital takeoff software
There are several digital takeoff software options available, each with its own unique features and advantages. For example, eTakeoff Dimension is an electronic quantity takeoff solution that increases speed and accuracy compared to traditional manual takeoff methods. It streamlines the workflow between takeoff and estimating, allowing you to deliver the best estimates. Square Takeoff, on the other hand, is designed for electrical contractors to upload digital blueprints and complete takeoffs three times faster than manual methods. It includes a count tool that automatically calculates the number of items needed, reducing the likelihood of errors in counting.
Another popular software, Countfire, is an automated takeoff solution that can dramatically speed up your takeoffs. It automatically detects symbols and text references across multiple PDFs, allowing for efficient counting across drawings and projects. Countfire also offers features that enable you to work with incorrect or poorly drawn plans, such as adding symbols, editing selections, and managing false positives.
Vision InfoSoft also offers digital plan takeoff options, providing tools for counting directly from PDF, JPG, TIFF, or CAD plan files. Their Electrical Bid Manager™ software integrates with PlanSwift and On-Screen Takeoff, providing a seamless experience for electrical plan takeoff.
When choosing digital takeoff software, it is important to understand its limitations. While it offers immense benefits, most software requires constant user intervention, and some complex electrical components might necessitate manual annotations to ensure complete accuracy. Additionally, consider the specific features that align with your needs and budget, as some software may provide more advanced tools or integration options with other platforms.
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Estimating material grades and costs
Understanding Project Requirements: Before estimating material grades and costs, it is crucial to thoroughly review the project's architectural and electrical drawings. This includes examining working heights, elevations, circuit layouts, and wiring configurations. By grasping these details, you can better assess the required material grades and quantities, ensuring compliance with the project's specifications.
Consistency in Measurement and Counting: Consistency is key when measuring and counting symbols on electrical plans. By maintaining consistency, you can streamline the estimation process, reduce errors, and improve accuracy. Utilize proper forms, coloured pencils or pens, and counters to systematically identify and quantify electrical components.
Material Grade Selection: Offering a less expensive material grade without prior approval can lead to significant cost increases during project execution. It is essential to specify the intended material grades in your estimate and obtain written approval from the client if you propose an alternative option. This ensures that you are not held to unexpected costs arising from specified material grades.
Cost Estimation: When estimating costs, consider both direct and indirect expenses. Direct costs refer to the estimated job costs, including material and labour expenses. Indirect costs, or overhead, encompass expenses necessary to run your business, such as office lease, estimating, sales, marketing, and bookkeepers. Profit is also added to the total project costs to determine the sales price.
Digital Takeoff Software: Utilizing digital takeoff software can significantly enhance the accuracy and efficiency of your material grade and cost estimations. These tools streamline the process by enabling you to upload digital blueprints and project specifications, then providing user-friendly tools for identifying and measuring electrical components. However, it is important to recognize that digital takeoff software may require manual intervention and annotations for complex electrical components.
By following these considerations, you can improve the accuracy and effectiveness of your material grade and cost estimations in electrical take-offs, ultimately contributing to smoother project execution.
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Reviewing and submitting your bid
Consistency and Accuracy:
Ensure consistency in your measurements and calculations. Double-check your plans, counting and measuring symbols accurately. Verify that your takeoff hinges on precise project plans and specifications to avoid mistakes due to inconsistencies or missing information.
Second Review:
Get a fresh pair of eyes from your estimating team to review your work. This ensures nothing was missed during the original takeoff. Their review should involve taking off the project's major systems, providing an additional layer of validation.
Bid Log and Comparison:
Maintain a bid log, such as a simple Excel spreadsheet, to record relevant information. Include details such as recently completed projects, their types, sizes, and price-per-square-foot. While you shouldn't bid based on this data, it serves as a valuable reference point. Compare your current project with similar past projects to identify any significant variances in pricing. If there are notable differences, investigate the reasons to refine your bid.
Profit and Overhead:
When determining your sales price, remember to account for profit and overhead. Overhead refers to the total indirect expenses required to run your business, such as office leases, estimating, sales, marketing, and bookkeepers. Both profit and overhead are percentages added to project costs.
Submission:
Once you've thoroughly reviewed your work and addressed any discrepancies, it's time to submit your bid. In today's digital age, bids are typically submitted electronically through designated bid sites or via email. Ensure you follow the submission guidelines provided by the receiving entity.
Remember, submitting your bid is a critical step in securing new projects. Accuracy, consistency, and a thorough review process are key to ensuring your bid is competitive and free from errors.
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Frequently asked questions
An electrical takeoff is the process of identifying and quantifying all the electrical components required for a construction project. This includes everything from the branches and feeders to functional devices like outlets and switches.
There are two main ways to do an electrical takeoff: manual and digital. Manual takeoffs involve measuring electrical components directly on paper plans, followed by handwritten calculations and paper-based records. Digital takeoffs involve using software to identify and measure electrical components on digital plans. While digital takeoff software is widely used and offers benefits such as increased speed and accuracy, it is important to acknowledge its limitations and potential for errors.
Here are some best practices for doing an electrical takeoff:
- Develop a consistent and organised method for counting and measuring symbols on plans to reduce errors and estimation time.
- Double-check project documents for inconsistencies, missing information, or errors before starting the takeoff.
- Use coloured pencils or pens to identify each item on the plan, creating a colour representation of the electrical work required.
- Review architectural and electrical drawings to understand working heights and elevations that will impact labour costs, material pricing, and equipment requirements.
- Get a second set of eyes to review your work and ensure nothing was missed during the original takeoff.
