3d model view of drone land survey using photogrammetry and laser scan for land & measured building survey

Accurate Measured Survey Essentials: How to Ensure Precision in Your Building Project

Imagine launching a building project, only to find halfway through that the measurements were off. The additional costs, delays, and frustration would be considerable, wouldn’t they? This is where a measured survey, also known as a measured building survey, comes into play, ensuring precision in every detail of your project.

Key Takeaways

Drone and ground basedDrone Survey: Enhancing Measured Building & Land Survey Data | Crucial Services
Drone Survey: Enhancing Measured Building & Land Survey Data | Crucial Services
3D Revit delivered to the client as an IFC file for use in ArchiCAD
3D Revit delivered to the client as an IFC file for use in ArchiCAD

Understanding Measured Building Surveys

Measured building surveys play a pivotal role in the success of construction projects. Whether it’s a home renovation, a heritage asset or a multi-story commercial building, these surveys accurately measure a building’s structural and architectural elements. Older premises, in particular, can have complex layouts, which can be tricky to assess without an accurate survey. Survey data is meticulously recorded to produce detailed CAD drawings or BIM models, which are indispensable for architects, designers, and construction professionals alike.

Modern technology plays a key role in achieving high levels of precision in measured surveys. Advanced tools like long-range Leica and Riegl laser scanners, along with multi-band RTK GNSS receivers, ensure the collection of precise data for every survey. These technologies have revolutionized the surveying world, providing the accuracy and efficiency that today’s construction projects demand. Mobile scanning using Slam technology has added new dimensions to 3d laser scanning surveys, increasing data collection rates without sacrificing accuracy.

Farrow Orbis Slam 3d scanner in action at Ludlow Castle
The new Farrow Orbis slam scanner in action at Ludlow Castle
3d laser scan of Ludlow Castle by the Great Tower & inner bailey gate
3d laser scan of Ludlow Castle by the Great Tower & inner bailey gate

The Basics of a Measured Building Survey

A measured building survey isn’t just about taking a few measurements. It’s a detailed process involving experienced surveyors who use advanced tools like laser measurement devices alongside traditional methods to ensure every data point falls within acceptable accuracy tolerances. After all, the success of any building project hinges on the accuracy of its measurements. That’s why a measured building survey service is essential for a successful outcome.

The procedure aims to reduce problems arising from inaccurate measurements, minimizing errors and blunders. Think about it: if the initial measurements are off, the resulting architectural drawings will be too. This can lead to cost escalation, project delays, and non-compliance with planning conditions and building regulations. Conducting a detailed survey is an essential first step in any building project.

The Role of Modern Technology in Accuracy

The impact of modern technology on measured surveys is considerable. Take the 3D laser scanner, for instance. This sophisticated device captures the existing surroundings in three dimensions, providing precise measurements of a property. And when we say precise, we mean it. For example, the Faro S70 & S350+ 3D laser scanners can capture up to 1 million points per second with an accuracy error of only +-2 mm.

This level of accuracy is indispensable for any building project, whether small home renovations or large commercial ventures. The rapid and precise data collection enabled by 3D laser scanning allows for efficient collection of a large volume of information within a relatively brief timeframe. This includes capturing both internal and external elevations of a building, providing a comprehensive understanding of the structure.

The Importance of Precision in Measured Surveys

Precision is the linchpin of measured surveys. After all, accurate measurements translate into accurate drawings, which are the foundation of a building project’s planning, design, and construction phases. But what happens when precision is lacking? To avoid such issues, producing accurate drawings from the beginning is crucial.

An inaccurately measured building survey can cause numerous problems, including:

On top of these, there are also potential legal issues arising from miscalculations of required project materials. To avoid these pitfalls, both measured building surveys and topographical surveys are conducted to provide accurate information about the building and the site’s terrain and features, respectively.

Ensuring Accurate Data for Informed Decisions

Measured building surveys with inaccurate data can result in unexpected expenses, project delays, legal disputes, and environmental issues. Accurate survey data, on the other hand, establishes a reliable basis for design, providing precise measurements and comprehensive information about the existing structure, layout, and utilities.

This is crucial not just for architects and planners, but also for facilities managers. Precise data from measured building surveys supports better decision-making in facilities management, providing detailed information about:

This data also aids in the design and construction processes, enhancing the accuracy of architects’ plans, reducing risks, and providing a comprehensive understanding of a building’s physical characteristics.

How Many Floors? Detailing Vertical Accuracy

While horizontal measurements are crucial in a measured survey, vertical accuracy is just as important. It plays a key role in determining the number of floors in a building, facilitating precise indoor positioning, and estimating the floor count.

Attaining vertical precision in building surveys is a challenging endeavour. It requires the use of:

Despite the challenges, surveyors are adept at ensuring precision in their calculations, providing accurate vertical measurements essential to any building project.

Tools and Techniques for Reliable Measurements

A building structure being monitored for deformation with a total station
A building structure being monitored for deformation with a total station

Land surveyors use various tools, from pocket tapes to terrestrial laser scanners, to guarantee accurate and precise measurements in building surveys. These tools offer the precision necessary for precise building measurements, making them indispensable for any project.

Reality capture methods have also become part and parcel of modern surveying. These methods enable rapid and efficient data collection, maximizing productivity and efficiency, and lowering long-term costs. With over 30 years of experience in measuring buildings for conservation, restoration, and renovation, our surveyors have mastered using these tools and techniques to provide reliable measurements.

From Tape Measures to Terrestrial Laser Scanners

Surveying tools have come a long way over the years. What started with simple pocket tapes and electronic tape measures has now evolved to include high-performance terrestrial laser scanners. These advanced tools offer surveyors the precision necessary for precise building measurements.

Moreover, terrestrial laser scanners have revolutionized the field of surveying. Emitting laser pulses towards specific points on the terrain, these scanners can acquire XYZ coordinates for multiple points, providing a wealth of precise data. These tools are frequently employed in intricate construction projects, playing a crucial role in:

terrestrial 3d laser scanner measuring a church
Terrestrial 3d laser scanner measuring a church
Ground based laser scan - blue areas are shadows with no points
Ground-based laser scan point cloud data of the church

Reality Capture: From Point Cloud to Precision

Reality capture is a game-changer in the field of surveying. This method involves using technology to gather site data and generate 3D models of physical assets, providing a comprehensive understanding of the site’s design layout.

Data acquisition in reality capture methods involves photogrammetry, which creates point clouds from images captured by digital cameras. This can be with terrestrial photogrammetry using DSLR cameras or aerial photogrammetry using drones. Point cloud data is then generated and converted into CAD drawings or BIM models, providing accurate and detailed information. This level of accuracy and detail is crucial for ensuring precision during the survey process, making reality capture an invaluable tool in measured surveys.

Drone creating a point cloud using slam lidar
Drones can create a point cloud using slam lidar as part of a measured building survey.

Cost-Effective Solutions for Your Measured Survey Needs

While precision is paramount in a measured survey, it’s also crucial to consider the cost. Several factors influence the cost of a measured survey, including the project’s size and complexity and the specific tools and techniques employed.

It is important to remember that larger buildings require more time and resources, resulting in higher costs. However, potential additional expenses may arise due to the intricacy of the property, challenges related to accessibility, and the necessity to survey concealed or enclosed elements. Despite these potential costs, the benefits of a measured survey, such as avoiding costly mistakes and ensuring the project’s success, far outweigh the expenses.

What Determines the Survey Cost?

Several factors determine the measured survey cost. The size of the project has a direct impact on the cost as larger projects demand more time and resources. The required detail level also influences the cost of a measured building survey. A comprehensive survey that includes specific features and complexities, such as creating interactive 3D building models, requires more time and expertise, resulting in higher costs.

Using sophisticated equipment, like a terrestrial laser scanner, also comes with distinct financial considerations. While these advanced tools may incur higher initial expenses, their ability to provide greater accuracy and expedited results makes them potentially cost-effective for extensive or intricate projects in the long run.

Competitive Pricing and Value for Money

Survey professionals understand the importance of providing high-quality services at competitive prices. They:

When providing a quote for a measured building survey, factors such as the property size, required level of detail, and the surveying method used are considered. Each survey is priced based on these distinct characteristics. While the starting price for a 3D BIM model or measured building survey in the UK is approximately £550 per model, it’s important to remember that the final measured building survey cost can vary based on the project’s size, shape and specific requirements.

Comprehensive Services Offered by Survey Professionals

A risk assessment being conducted on a building structure
A risk assessment being conducted on a building structure

Survey professionals provide a broad spectrum of services customized for various industries, including:

They have the skills and expertise to deliver precise and accurate measurements.

Detailed Specification of Surveying Services

Surveying is not a one-size-fits-all service. It must be tailored to the client’s needs and the project’s specific requirements. This could include:

The procedure for conducting these surveys depends on the type of survey. For example, a topographical survey involves using precise GPS equipment to survey the area and generate accurate site measurements. On the other hand, a building survey involves a qualified surveyor physically examining the property to assess its condition.

For more complex projects, surveyors also offer underground utility tracing, which involves identifying the type and position of subsurface utilities.

The Experienced Team Behind Accurate Measurements

An experienced team is at the heart of every accurate measurement. Building surveyors require a bachelor’s degree in building surveying or a related field, along with relevant work experience. Their training often includes an apprenticeship that spans around five years and may encompass coursework in building surveying, construction, land, and property.

The team’s extensive experience ensures proficiency in precision and reliability during experiments and data interpretation. Each team member plays a pivotal role, such as:

All of these contributions contribute to accurate measurements. They stay updated on the latest advancements in surveying technology to ensure they possess the current knowledge and tools.

Project-Specific Considerations for Measured Surveys

Measured surveys are not a universal solution. They need to be tailored to the specific requirements of each building and project. This involves:

Whether the project involves restoration, renovation, or conservation, measured surveys are essential for gathering precise measurements of architectural features, materials, and layouts. This data is crucial for accurately documenting historical structures and serves as a baseline to ensure that changes remain faithful to the original design.

Adapting to Different Building Types and Needs

Different types of domestic and commercial buildings necessitate distinct survey approaches. Residential building surveys, for instance, offer a detailed assessment of the structure and condition, identifying potential issues or defects. On the other hand, commercial building surveys require a more comprehensive analysis that includes evaluations of structural integrity, condition, regulatory adherence, and environmental considerations.

Industrial building surveys emphasize functionality, focusing on aspects such as structural elements, layout, access, storage, compliance with safety regulations, handling of hazardous materials, environmental impact, and risk assessment.

Regardless of the building type, survey professionals are adept at adapting their services to meet specific needs.

Integrating Measured Surveys with Planning Applications

Accurate measured surveys play a vital role in the planning application process. These surveys ensure that the architect’s plans are precise, encompassing floor areas, room widths, and heights of rooms. This streamlines the planning application process by providing the exact data necessary for regulatory adherence and design precision.

The process of integrating measured survey data into a planning application includes:

This seamless integration of accurate measurements with planning applications makes measured surveys invaluable for architects, developers, and construction companies.

Summary

Measured building surveys are the cornerstone of successful construction projects. They provide the precision to create accurate CAD drawings or BIM models, ensuring informed decision-making in building projects. With the help of modern technology, experienced professionals, and a focus on providing cost-effective solutions, these surveys offer invaluable insights into the structure and layout of a building. Whether you’re an architect, a developer, or a construction professional, incorporating measured building surveys into your project planning process is an investment that pays dividends in accuracy, efficiency, and cost savings.

Frequently Asked Questions

What is a measured survey?

A measured survey is the process of accurately surveying and producing detailed drawings, such as floor plans and elevations, which form the basis of any design work. It involves taking measurements of sites or buildings and representing the data as drawings or models at a reduced scale.

How much does a surveyor cost UK?

The cost of a home survey in the UK ranges from £400 to £1,425 on average, based on factors like property price, size, location, and the type of survey required.

Why are measured building surveys important?

Measured building surveys are important because they provide precise measurements of a building’s structural and architectural elements, essential for accurate CAD drawings or BIM models used in a building project’s planning, design, and construction phases.

What role does modern technology play in measured surveys?

Modern technology, like 3D laser scanning and high-resolution photogrammetry cameras, ensures accuracy and efficiency in measured surveys by enabling rapid and precise data collection, resulting in accurate drawings.

How does the size of a project influence the cost of a measured survey?

The size of a project significantly affects the cost of a survey, as larger projects typically require more time and resources, leading to higher costs. The level of detail and specific tools and techniques used also play a role in determining the overall cost.



David Walker McInstCES AssocRICS avatar