FREQUENTLY ASKED QUESTIONS

GPRS is the only company that provides a comprehensive suite of both above and below-ground infrastructure visualization services. This includes utility locating, precision concrete imaging, 3D laser scanning, video pipe inspection, leak detection, and mapping & modeling.

We also have an unmatched, nationwide network of highly-trained Project Managers who can respond to your job site, no matter where it’s located, usually within 24-48 hours of contact.

And nobody can match our dedication to the safety of you and your team. Contact us today to experience the GPRS difference yourself.

Read our Statement of Qualifications to learn about what makes GPRS the leader in Intelligently Visualizing TheBuilt World^®.

Yes we do! Please contact our corporate office at 419-843-9804 to discuss equipment sales.

GPRS routinely services and calibrates all our equipment to ensure the most accurate results on your project.

Please visit our sales page to request a quote today!

Our team members are the key to the sustained success that GPRS has enjoyed since we first opened our doors in 2001. We’ve maintained that consistent excellence by prioritizing certain qualities that set us apart from our competition when hiring new team members, because we only want the best representing our brand and helping keep your projects on time, on budget, and safe. Our strong sense of integrity, proven competency in our field, and commitment to our customers are just a few of the qualities that make GPRS a cut above the rest.

While we do not provide engineering services, we use Subsurface Utility Engineering (SUE) Level 2-equivalent methodology and equipment to locate underground utilities with a 99.8% rate of accuracy. We don’t conduct SUE work ourselves, but our services allow a SUE Level 1 investigation to be performed more efficiently, eliminating the need to waste thousands of dollars on exploratory potholing.

Every member of our team of nationwide ProjectManagers completes a three-month training process which includes two weeks a tour state-of-the-art Training Center in Sylvania, Ohio. This facility features roughly 6,000 s.f. of dedicated test slab designed to simulate most conditions we encounter in the field. Riddled with buried utilities, this test slab is designed to provide an immersive training experience for our ProjectManagers-in-training.

In total, each Project Manager completes 320 hours of field training and 80 hours of classroom training to achieve Subsurface Investigation Methodology (SIM) 101 certification – a requirement to work as part of GPRS’ field team.

Yes! With a nationwide team of specially trained Project Managers, we can respond to your project site when you need us, wherever you need us. That includes working nights and/or weekends to help you stay on time, on budget, and safe.

Contact your local GPRS representative to learn more about our rates and availability.

We can usually have a Project Manager on your site within 24-48 hours of contact.

Click here for an online quote form.

GPRS strongly believes that our team members are the key to our sustained success over our 20+ years in business. We look for certain qualities that set us apart from the competition when hiring new team members, because we only want the best representing our brand and helping you keep your projects on time, on budget, and safe. Our strong sense of integrity, proven competency in our field, and commitment to our customers are just a few of the qualities that make GPRS a cut above the rest.

We’ve strategically stationed our team of specially trained Project Managers across every major market in the U.S., so you always have precision concrete scanning, utility locating, 3D laser scanning, sewer line inspection, leak detection, and mapping & modeling services near you.

GPR scanners emit radio waves into the ground or a surface such as concrete, then detect the interactions between those waves and any subsurface materials such as buried utilities, rebar, or underground storage tanks (USTs). GPRS uses GPR scanners for both precision utility locating and concrete scanning and imaging, utilizing varying antenna strengths for different applications depending on the scanned material and how deep objects are buried.

GPR is highly effective at locating subsurface utilities and other materials. However, it does have certain limitations. Performing locating services on suboptimal ground and soil conditions, inclement weather, and the material of the object being located are just a few potential limiting factors. We can provide alternative recommendations if conditions are unsuitable for GPR scanning.

Yes, GPR can be used to locate unmarked graves for site planning purposes. GPRS can locate most grave sites, even those that have experienced material decomposition.

Yes, GPRS can use GPR scanners on concrete masonry unit (CMU) walls and structures. GPR can also determine the presence or absence of grout, bond beams, vertical rebar, horizontal rebar, and joint reinforcing within the CMU structure.

Yes, GPRS regularly uses GPR scanners to locate rebar in concrete columns and walls. We also can use GPR to examine the underside of a floor to mark out the reinforcing steel and any embedded conduits.

No. While GPR scanners can identify the area where the void is occurring and the boundaries of that void, it cannot measure the void’s depth.

While accuracy depends on various external factors such as ground and soil conditions, the GPRS standard ensures that we can obtain the best results possible in each situation. Through experience, we've found that when using a concrete antenna for scanning, the accuracy is typically +/- ¼" to the center of the object and +/- ½" to the actual depth. When locating an object using a utility locating antenna for scanning, the accuracy is +/- 6" to the center and +/- 10% to the actual depth. The results of the concrete antenna are generally higher resolution and therefore considered to produce better quality results. However, the concrete antenna cannot penetrate the ground as deeply as the utility locating antenna. It is critical to understand the benefits and limitations of both when performing scanning work.

Yes, GPR is a safe, non-invasive tool used to identify subsurface objects. Unlike X-Ray technology, it does not emit any harmful radiation or other byproducts. It also does not create any noise, and the area can remain undisturbed during the scan. Please contact us with any questions regarding the safety of GPR usage.

It depends on the type of application. When concrete scanning, the GPR antenna can typically penetrate 18”-24” into the ground. For private utility locating on grass, asphalt, or concrete, the antenna can typically penetrate up to 8’ depending on site conditions. In certain situations, a larger antenna can be used for greater penetration. Please contact your local GPRS representative for more information on selecting the right GPR service for your project.

Contact us! Call or visit our website, and we will help you determine how GPR services can meet your needs.

GPRS uses a variety of infrastructure visualization tools, including concrete scanning and utility locating GPR antennae.

We offer elevated concrete slab scanning and concrete slab-on-grade locating. Elevated concrete slab scanning involves detecting embedded electrical conduits, rebar, post tension cables, and other embedded objects prior to a core drilling project. Concrete slab-on-grade locating services typically involve scanning a trench line for conduits before saw cutting and trenching occurs to install a sanitary pipe, water line, etc.

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We can typically differentiate between tendons versus rebar in post-tension slabs due to the expertise of our Project Managers. Their rigorous training helps them recognize the differences in patterns, depth, spacing, and GPR reflections. Because all of our Project Managers are SIM-certified, they’re experts with their equipment, professionally trained, and up-to-date on the most effective GPR methodologies.

Ground penetrating radar (GPR) is highly effective at distinguishing between rebar and electrical conduit in most scenarios. We consistently achieve a high success rate in identifying electrical lines within supported slabs or slabs-on-grade prior to saw cutting or core drilling. In addition, GPRS utilizes electromagnetic (EM) locators to pinpoint conduit locations within concrete. When a signal can be transmitted through a metal conduit, we can locate it with exceptional precision. If the conduit carries a live electrical current, we can also detect it passively. By combining GPR with EM induction, we deliver one of the most thorough and accurate conduit locating services available.

In post-tensioned construction, it's common to see a single layer of support rebar positioned near the bottom of the slab. This reinforcement mat is typically evenly spaced and set at a uniform height. Post-tensioning cables are usually placed above this mat and are “draped” throughout the structure. These cables tend to sit higher near beams and column lines, dipping lower in the spans between them. Understanding these structural distinctions enables us to clearly identify each component. Our Project Managers ensure you feel confident in our assessments and fully prepared to drill or cut without concern.

GPRS provides two specific but different scanning services in this area: Elevated concrete slab scanning and concrete slab-on-grade locating. Elevated concrete slab scanning involves detecting embedded electrical conduits prior to core drilling a hole through the slab. Concrete slab-on-grade locating – a concrete slab poured directly over dirt – involves scanning a trench line for conduits before conducting saw cutting and trenching to install a sanitary pipe, water line or something similar.

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Ground penetrating radar (GPR) is highly effective at distinguishing between rebar and electrical conduit in most scenarios. We consistently achieve a high success rate in identifying electrical lines within supported slabs or slabs-on-grade prior to saw cutting or core drilling. In addition, GPRS utilizes electromagnetic (EM) locators to pinpoint conduit locations within concrete. When a signal can be transmitted through a metal conduit, we can locate it with exceptional precision. If the conduit carries a live electrical current, we can also detect it passively.  By combining GPR with EM induction, we deliver one of the most thorough and accurate conduit locating services available today.

Whether you're excavating for new construction or renovating an existing structure, there are numerous subsurface hazards that must be identified before any excavation, core drilling, or saw cutting begins. Choosing not to schedule Utility Locating services can have serious consequences for your job site and your company. Overlooked hazards can lead to safety incidents, project delays, and unexpected costs—potentially putting the entire project at risk. We specialize exclusively in this work, which is why we’re the best at it. When you need to know what lies beneath the surface, trust the nation’s leading utility and concrete scanning experts. The success of your project may depend on it.

We’ve established a thorough and proven methodology for leak detection. When all conditions are met and our technologies are fully utilized, we stand by the accuracy of our leak location markings with confidence.

While it can vary, our Project Managers typically can test up to 10 miles of pipe a day on a metallic system (cast iron/ductile), and one contact point (hydrant/valve) per minute.

Our acoustic listening devices are extremely sensitive, capable of amplifying leak sounds as well as other ambient noises that can obscure leak signals during daytime hours. In urban environments, background noise is often substantial — ranging from airplanes and traffic to lawn equipment, machinery, and, most notably, people using water. It’s the responsibility of the Leak Detector to assess whether nighttime work is necessary to reduce these distractions and better isolate the leak signal.

After reviewing data from thousands of previously detected leaks, we asked clients to share photos of the repairs. These images have allowed us to compare our detected leak signals with the actual leak locations. We estimate the size of a leak based on how far the signal travels between contact points and the pitch of the tone received. However, we do not provide formal leak size estimations.

Water naturally follows the path of least resistance. It can travel through fractures in subsurface rock or enter storm drains, sanitary systems, and conduit piping. In areas with sandy subsurface conditions, water tends to migrate even farther downward. In over 99% of the leaks we detect, no water is visible at the surface.

GPRS’ leak detection services support municipalities and facilities in maintaining safe and efficient water distribution across pressurized domestic supply networks and fire protection systems. Aging or damaged infrastructure often leads to water loss, resulting in unnecessary expenses for clients. By accurately locating these leaks, GPRS helps reduce the number of costly excavations needed for repairs.

Our NASSCO-certified Project Managers can inspect pipes from 2” in diameter and up.

Absolutely! Our SIM- and NASSCO-certified Project Managers utilize Video Pipe Inspection (VPI) technology equipped with sondes — specialized probes that help determine the location of underground utilities from otherwise inaccessible areas. This capability allows them to perform electromagnetic (EM) locating simultaneously while assessing sewer systems for structural defects.

GPRS robotic crawler cameras have a reel length of 1,000 linear feet. We typically inspect miles of the pipeline but can check 1,000 linear feet from any point continuously.

When laser scanning is part of your workflow, CAD technicians transform point clouds into practical deliverables. Many software platforms now offer automated tools for classifying, grouping, or de-noising point cloud data, streamlining the conversion process. In the laser scanning industry, this is often referred to as “artificial intelligence” or “machine learning.” Artificial intelligence (AI) describes software that performs decision-making or classification tasks traditionally handled by humans, while machine learning refers to the software’s ability to improve those tasks over time through repetition and human-guided training.

If you’re using laser scanning as part of your workflow, CAD technicians take point clouds and turn them into useful deliverables. Many software packages offer automated classification, or point grouping, or de-noising to quickly turn point cloud data to useful deliverables. In the industry of laser scanning, this process is called “artificial intelligence” or “machine learning”. Artificial intelligence (AI) refers to software that makes decisions or classifications that would have traditionally been made by humans, and machine learning refers to that software’s ability to get better at those tasks through repetition and training via human input and feedback.

When evaluating the cost of a laser scanner, it’s essential to look beyond the initial purchase price. Additional expenses often include qualified personnel, software licenses, training, routine calibration, and potential legal considerations. Understanding the full scope of these costs can highlight the value and potential savings of hiring an experienced professional instead of investing in your own equipment.

GPRS is a trusted partner to hundreds of clients for 3D laser scanning and modeling services. Our team operates with integrity, dedication, and professionalism, consistently delivering the highest standards in the industry. At the core of our success is a commitment to client service. We collaborate closely with each client to provide top-quality point clouds, 2D CAD drawings, and 3D BIM models tailored to their needs.

We offer versatile 3D laser scanning solutions across a wide range of industries, including:

• Agricultural Facilities
• Architectural Documentation
• Concrete Construction
• Construction
• Clash Detection
• Design Build
• Energy & Utilities
• Engineering
• Government, Defense & Military Sector
• Healthcare & Pharmaceutical
• Historical Documentation & Preservation
• HVAC & MEP Coordination
• Industrial, Manufacturing, Assembly & Distribution Facilities
• Mixed Reality & 3D Projection Mapping
• Office & Commercial Buildings
• Overhead Clearances
• Oil & Gas Facilities
• Power Plants & Process Plants
• Real Estate
• Stadiums, Arenas & Theatres
• Telecommunications
• Schools & Universities
• Subsurface Utility Engineering
• Virtual Design and Construction
• Water & Wastewater Treatment Plant
• Accident Reconstruction
• 3D Video Gaming & Software Development

There are many benefits of 3D laser scanning your site instead of using traditional means to “as-built” a job site:

• Safer – Eliminates the need for lifts, safety harnesses, etc.
• Faster – Less people are required and more area can be covered. Reduces costs – Associated with field trips to gather initial information or additional details that were missed originally.
• Saves time – Eliminate time out of the office when you could be doing other things while the scanning is being done.
• Saves money – Travel costs, rental of man lifts, inaccuracy of obtaining data and loss of productivity in the office while technicians are in the field.
• Streamlines workflow – When the client receives the deliverables, they are ready to begin their work immediately.

GPRS is one of the most experienced providers of 3D laser scanning services in the industry. We’ve delivered scanning and modeling solutions across a wide range of sectors and can rapidly deploy to any location within the United States. Our portfolio includes work with leading firms on projects involving manufacturing and industrial plants, oil and gas refineries, historic landmarks, stadiums, theaters, hospitals, universities, municipalities, wastewater treatment facilities, and even new construction verification. As a licensed engineering firm dedicated exclusively to laser scanning, our in-house team of scan technicians and engineers collaborates closely with each client to capture accurate existing conditions and deliver customized outputs—from point clouds to 2D CAD drawings and 3D models.

A digital twin is a sophisticated virtual replica that mirrors a physical object in exact detail. At GPRS, we use 3D laser scanning technology to capture real-time data from buildings or facilities and generate a precise digital counterpart. This data can be easily visualized, measured, and analyzed. Digital twins help enhance efficiency, streamline workflows, and identify potential issues before they arise.

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NAICS Codes:‍

• 541370 Surveying and Mapping
• 541330 Engineering Services
• 541340 Drafting Services
• 541690 Other Scientific and Technical Consulting Services

SIC Codes:

•  87130000 Surveying Service

CSI Codes:

•  2073 3D Laser Scanning and Dimensional Survey

PSC and FSC Codes:

• C217 Mapping
• C218 Architectural and Engineering Services
• 1550 Drones
• 6675 Drafting, Surveying and Mapping Instruments
• R425 Engineering and Technical Services
• R617 Data Collection Services

With design intent, deliverables will be shown as a “best fit” to the point cloud working within customary standards. This includes walls being modeled 90 degrees perpendicular to the floor, pipes and conduit modeled straight, floors and ceilings modeled horizontal, and steel members modeled straight. This process produces cleaner 2D drawings and allows for easier dimensioning of the scan area. The deliverables, however, will not exactly follow the scan data to maintain design intent standards.

As-built deliverables are shown as close to possible to actual field capture. It reflects any walls which are out of plumb, sagging pipes and conduit, unlevel floors and ceilings, etc. This will produce reality-capture deliverables, but 2D drawings may show “crooked” or out of plumb lines, floors will be sloped or contoured, steel members may show camber, twisting or impact damage. Dimensioning will not be as easy due being out of plumbness/levelness, etc. This option should be used when the exact conditions of the scan area is imperative. Clients using the data for fabrication, forensic analysis, bolt hole patterns, camber/sag/deformation analysis, and similar needs would require this option.

Most projects which require as-built information can benefit from 3D Laser Scanning Services. Talk with our 3D laser scanning experts today to learn more.

Our engineers and CAD technicians are trained in the following software:

• Autodesk Recap
• Autodesk Revit
• Autodesk 3DS Max
• Autodesk Navisworks
• Autodesk AutoCADCivil 3D
• Autodesk AutoCAD Map 3D
• Autodesk BIM 360
• Autodesk A360
• Autodesk Recap
• AutoCAD
• ArchiCAD
• Bentley MicroStation
• Bentley Descrates V8i
• ClearEdge 3D Edgewise
• Leica Cyclone
• FARO As-Built
• FARO Scene
• Scene 2go
• Scene Webshare
• AVEVA LFM
• Cintoo
• CloudCompare
• Unreal Engine
• FileZilla
• ShareFile
• Dropbox
• Register 360
• JetStream Viewer
• TruView

We can provide 3D modeling in many formats such as:

• Point Cloud Data (Raw Data)
• 2D CAD Drawings
• 3D Non-Intelligent Models
• 3D BIM Models
• JetStream Viewer

Customizable Deliverables Upon Request

• Aerial Photogrammetry
• Comparative Analysis
• Deformation Analysis
• Digital Drawings of GPR Markings
• Floor Flatness Analysis/Contour Mapping
• New Construction Accuracy Analysis/Comparative Analysis
• Point Cloud Modeling Training Webinars
• Reconciliation of Clients 2D Design Drawings
• Reconciliation of Clients 3D Design Model
• Structural Steel Shape Probability Analysis
• Template Modeling
• Volume Calculations
• Wall Plumb Analysis

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Data will be captured with industry-leading survey-grade Leica equipment. Leica ScanStations can tie to survey control, achieve 2-4mm accuracy and have real time liquid filled dual axis compensation to help mitigate movement and ensure level scans. GPRS scan technicians receive formal training from the scanner manufacturer, plus instruction from an experienced scan technician. Our laser scan technicians are highly trained on the following equipment:

• Leica P50
• Leica P40
• Leica RTC360 3D Laser Scanner
• Matterport Pro3

GPRS's clients range from small companies to large nationwide or global firms. GPRS is ready to mobilize to any site in the U.S., usually within the lead time of only one or two days. Additionally, we have the ability to be on-site short-term or long-term, depending on our clients' needs. We are the #1 provider of 3D laser scanning services and 3D BIM modeling services.

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Some projects require special applications due to limitations within the physical setting. Often times this is due to line-of-sight issues and when a scan must be done safely from the ground or with precautionary distance. Some of these applications would include above-ceiling MEP features in hospitals where it is necessary to maintain negative airflow or interstitial spaces that are congested with limited access. Since laser scanning is a non-contact measurement tool (i.e. we can scan from a safe distance or location) this becomes a powerful tool for solving these complex challenges.

SLAM stands for Simultaneous Localization & Mapping. SLAM's purpose is to move through a given space to create a digital map of that space that users can refer to.

For a better understanding, let's break down the term. Localization is to find the location of an object with reference to its surroundings. Mapping is to map the layout and framework of the environment.

In 3D scanning, a SLAM algorithm uses the LiDAR sensor to track a precise estimate of the point cloud scanner’s position as it moves through a space. The mapping software, in turn, uses this data to align your point cloud properly in space.

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LIDAR stands for Laser Imaging, Detection, and Ranging (commonly called Light Detection and Ranging). LIDAR is based on a principle referred to as time-of-flight, which uses a pulsed laser that emits the beam, a mirror that deflects the beam towards the scan area, and an optical receiver which detects the laser pulse and reflects it back to the scanner from the object. Time-of-flight refers to using the known speed of light with the amount of time it takes the laser pulse to be emitted, bounce off of an object, and return to the scanner to determine the distance the object is from the scanner (Distance = (Speed of Light x Time of Flight) / 2). LIDAR scanning collects data at a slower rate than phase-based scanners but is able to be used at greater distances than phase-based scanners.

Phase-based scanners emit a constant laser beam into multiple phases and compare the phase shifts of the returned laser energy. The scanner then uses phase-shift algorithms to determine the distance, based on the unique properties of each individual phase (Time of Flight = Phase Shift / (2π x Modulation Frequency)). Although phase-based scanners collect data at a much high rate than time-of-flight scanners, their effective distance is much shorter. Additionally, phase-based scanners tend to have more "noise," or false data, than time-of-flight scanners.

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GPRS offers high-definition 3D laser scanning for accurately capturing 3-dimensional data in a wide variety of settings, from laser scanning buildings to hospitals or universities to refineries, regardless of size and surface features. We can survey large-scale structures providing you with high definition 3D data quickly. High definition surveying is ideal for digitizing as-built construction and proposed additions or reconstructions. It can also be used to survey large projects during construction, to make sure the design is being executed properly.

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LiDAR is a remote sensing method used to generate precise, three-dimensional information about the shape of an object and its surface characteristics. Much like radar systems that employ radio waves to measure objects, LiDAR uses lasers to calculate the distance of objects with light pulses from 3D laser scanners, gathering 3D information about an object.

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BIM stands for Building Information Modeling and is more than just a 3D model. 3D BIM scanning gives engineers the ability to manage the building data throughout its whole life-cycle. It provides accurate spatial relationships and manufacturer details, as well as geographic information and other pertinent aspects of the building.

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As built 3D documentation is an accurate set of drawings for a project. They reflect all changes made in during the construction process and show the exact dimensions, geometry, and location of all elements of the work.

Many of our clients are relatively new to laser surveying, so we offer comfort and assurance by walking them through the entire process, from pre-planning to the final deliverables. We believe this is why we have had the opportunity to work with some of the best known firms and institutions in the United States.

We know that you have other options when it comes to laser scanning—renting or buying equipment or using a competitor. However, GPRS offers our clients what many of the other options cannot. Among the many reasons to choose GPRS are:

• Cutting-edge technology—GPRS uses the latest technology, equipment, and software.
• Industry trends—Laser scanning is a relatively new technology and, like so many other technologies, the industry changes quickly. Because GPRS uses the technology on a daily basis and because it is our sole specialty, we keep up to date on the trends in the field. Our clients can then focus on their core competencies.
• Training—Not only do GPRS technicians receive formal training directly from the scanner manufacturer, but they also receive thorough instruction from an experienced in-house technician. Furthermore, because our team of professionals are devoted solely to scanning and processing the scan data, we have developed the processes to work quickly, accurately, and knowledgably.
• Expertise—To each project, our GPRS team brings combined expertise in many areas, including engineering, architecture, information technology, and construction. Having this combination of knowledge is integral to providing our clients with the best service and optimal deliverables.
• Professional support—Since our scan technicians spend most of their time in the field completing building scanning, we have a trained office support team that is available to assist clients with questions and other information.
• Client-focused approach— We pride ourselves not only in listening to our clients' requests but also in anticipating their needs in ways that allow us to offer ideas and add value to our service.

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• Millions of real-world data points—A single laser can capture up to a million 3D data points per second, providing incredibly rich detail of every aspect of your project.
• Eliminate error—Individual measurements acquired by tape measures or hand-held devices are subject to errors. Laser scanning is the most accurate form of measurement available, delivering accuracy of a few millimeters or less.
• Answers unanticipated questions—How many times have you left the job site only to discover you need a few more measurements? A 3D BIM scanning will capture extra data, eliminating the need to return to the project to answer unanticipated questions.
• Reduce change orders and waste—The cost of a laser scan pales in comparison to the cost of change orders and construction delays. Incorporating a laser scan into the design of your project assures accurate and complete information, avoiding costly headaches, clashes and wasted material during the construction phase.
• Minimize shut-down times—Laser scanning is quick, safe and non-intrusive – eliminating or minimizing operational shut downs and client inconvenience.
• Increase safety—3D scanning can obtain measurements in hazardous locations while keeping workers out of harm’s way.

3D laser scanners use LiDAR (light detection and ranging) to measure and record precise locations and distances, ultimately producing a point cloud file. The technology enables you to produce highly accurate digital measurements and images quickly and easily for use in construction and engineering projects. 3d laser scanning is a revolutionary tool to document existing conditions. It is invaluable in design, prefabrication, asset management, and facility modifications.

When your GPRS Project Manager places a Green Box within a layout on a concrete slab prior to you anchoring or coring that concrete, we guarantee the area inside that green box will be free of obstructions. If we’re wrong, we’ll pay the material cost of the damage.

The GPRS Green Box Guarantee highlights four essential pillars of every project: safety, efficiency, cost-effectiveness, and transparent communication. Together, these elements support our industry-leading 99.8%+ accuracy rate and empower clients to actively contribute to preventing subsurface damage.

No, only GPRS. The Green Box Guarantee is an industry-leading, proprietary program we created to help prevent injuries and damages on your job site, keeping you and your team on time, on budget, and safe.

The Green Box Guarantee is designed explicitly for elevated concrete slabs, indicating areas free of obstructions such as rebar, post-tension cables, and electrical conduits. While the Green Box Guarantee does not apply to all concrete, utility, and video pipe inspection jobs – we stand by our work. We have a 99.8%+ accuracy rate on over 400,000 projects completed, and we continue to pursue 100% subsurface damage prevention.

No. Our green boxes communicate to you that an area is free of rebar reinforcement, electrical conduits, post tension cables, and any other critical targets. We only place green boxes on elevated concrete slab locations that we’re confident are clear to core, cut, or drill through. If we aren’t confident that you won’t hit anything, we won’t place a green box on the slab.