GPR & Radio Detection used to Locate Conduits in a Slab at a School in Ann Arbor, MI Prior to Saw Cutting

GPR & Radio Detection

A lot of times in older schools, electricians placed conduits in the pour of the concrete. It’s always hard to know the actual paths of the conduits 20-30 years after. There is technology such as ground penetrating radar & radio detection that can help identify where the conduits were placed. It is always good practice to have the floors scanned prior to any saw cutting to ensure existing utilities don’t get compromised.

In this situation, a general contractor began to saw cut the floors without having GPR & radio detection utilized. Once they began the saw cutting, numerous conduits were struck immediately. GPRS of Michigan was contacted by the general contractor to investigate the concrete floors before saw cutting any further. Once notified of the situation, GPRS was able to mobilize to the site the following day. They used a high resolution concrete antenna along with a radio detection device to scan the rest of the proposed saw cutting areas. As you can see from the photos it was a great idea for the general contractor to contact GPRS to scan the floors going forward. Numerous conduits were marked directly on the surface with the depths provided. It would’ve have taken days to figure out the paths of where the conduits ran to if they were cut & had to be replaced. Plus, the school was still in session so there would’ve been some power knocked out that was feeding the classrooms. The GPRS technician walked the site contact around to ensure everyone was on the same page with what had been located. In the future the general contractor mentioned they will no longer saw cut without having the floors scanned prior.

GPR & Radio Detection-2

Ground Penetrating Radar & Radio Detection are both great methods to locate underground utilities, sub-surface voids, conduits, reinforcing steel, etc. If you would like more information regarding the capabilities of GPRS, please contact Regional Manager of Michigan, Thaddeus Bullock, at 734.377.4551 or thaddeus.bullock@gprsinc.com. You can also visit the website at www.gprsinc.com.

GPRS Locates Utilities outside First Energy Stadium

Ground Penetrating Radar Systems was recently called by a general contractor to locate utilities for a project just outside First Energy Stadium in Cleveland, Ohio.  The scope of work was to locate any underground utilities for a new pole location that needed to be installed.  By using GPR and Radio Detection, a gas line, electrical lighting conduit, and communication duct bank were located in the area of concern.  GPRS was able to designate areas to safely install new pole locations.  GPR and Radio Detection is an accurate and effective way of locating underground utilities prior to excavation.  Give us a call prior to your next project and we will find what’s below the ground.

Below lists further details of the equipment used.
GPRS Locates Utilities outside First Energy Stadium

Equipment

Equipmenttool

Ground Penetrating Radar (GPR)

  • GSSI SIR – 3000
    • GPRS uses a Geophysical Survey Systems Inc. (GSSI) SIR-3000 Radar unit. This is the most advanced GPR available. It allows for onsite interpretation, as well as stores data for later processing. This equipment is self-calibrating, allowing more precise depth and location measurements.
  • 1600 MHz Antenna
    • This antenna allows data collection to a maximum depth of approximately 18”, depending on concrete conditions

Radiofrequency Detection System (RD)

  • RD 7000+
    • This is an electro-magnetic tone locating device manufactured by Radio Detection. This specific model detects live power and RF signals underground, allowing us to locate electrical or telephone lines even if they are below the minimum size requirements to be detected by GPR.  It also allows us to detect utilities via induction or conduction with an exposed or known surface of the utility.

For more information on how GPRS, Inc. can help you on your next project, please contact Micah Stair at 330-639-8933 or by email at micah.stair@gp-radar.com.  We also have the capabilities of locating conduits, rebar, and post tension cables in a concrete slab.


GPRS Makes Demolition Project Safer at Ann Arbor University

University in Ann Arbor

Having information on what lies beneath the concrete floors prior to saw cutting is essential to ensure the safety of the workers involved with the demolition. Also, having the information of where existing embedded conduits & plumbing run throughout the areas allows everyone to devise a plan as to where future utilities should be placed. The last thing you would want to do is cut through an electrical conduit that is feeding a portion of the University. Ground Penetrating Radar should be used to provide as much information as possible so that the saw cutting process goes smoothly.

A plumbing contractor had a project inside a University building in Ann Arbor, MI where they needed to saw cut portions of concrete slabs to install new utilities throughout the space. There was a need to locate all the existing plumbing lines that passed through the areas so that a plan could be devised on how to place the new plumbing. There was also a concern considering the main electrical panel was in the same area as the future saw cuts. The contractor didn’t have any information as to where the electrical passed through. The risk of possibly damaging multiple live power feeds during the saw cutting was too great to continue without added information. Ground Penetrating Radar Systems of Ann Arbor, MI was contacted by the plumbing contractor to conduct a concrete investigation to determine the paths of any embedded conduits & existing plumbing lines. GPRS performed the project using a 1600 MHz high resolution concrete antenna accompanied with a RD8000 (radio detection wand). The equipment used allowed GPRS to identify the main live power feeds passing through the saw cut areas & mark the findings directly on the surface in real time. All of the plumbing lines were also identified throughout the areas. All the findings were then communicated clearly to the onsite Superintendent.

University in Ann Arbor2

Don’t saw cut, core drill or dig without calling GPRS first. For more information in the Ann Arbor, MI area, contact Regional Manager, Thaddeus Bullock at 734.377.4551 or Thaddeus.bullock@gp-radar.com. You may also visit www.gp-radar.com.

GPRS Locates Electrical/Data Conduits at the Cleveland Clinic-Richard E Jacobs Health Center in Avon, Ohio

On December 19th 2016, Ground Penetrating Radar Systems (GPRS) was requested on site by a general contractor to perform a Ground Penetrating Radar (GPR) survey at the Cleveland Clinic-Richard E Jacobs Health Center.  The contractor needed to saw cut a trench to install new plumbing lines and remove existing drains.  The contractor needed to know if there were any conduits in the area to avoid saw cutting through them.  GPRS located two active electrical/data banks of conduits going directly through their saw cut area.  The conduits were painted on the surface with depth indications so that the contractor could safely saw cut over or around them without hitting the conduits.  The hospital had no drawings showing the banks of conduits.  Without GPRS on site, the contractor would have saw cut through them as they were right at the bottom of the concrete slab.  Before you saw cut or core drill, call GPRS to know what’s underground!

The pictures below show the banks of conduits marked out on site.

Avon1

Avon2
 

Equipment

Equipment

Ground Penetrating Radar (GPR)

  • GSSI SIR – 3000
    • GPRS uses a Geophysical Survey Systems Inc. (GSSI) SIR-3000 Radar unit. This is the most advanced GPR available. It allows for onsite interpretation, as well as stores data for later processing. This equipment is self-calibrating, allowing more precise depth and location measurements.
  • 1600 MHz Antenna
    • This antenna allows data collection to a maximum depth of approximately 18”, depending on concrete conditions

Ground Penetrating Radar Systems is the best way to ensure the locations of reinforcement and conduits prior to saw cutting/drilling through concrete.  For more information on how GPRS, Inc. can help you on your next project, please contact Micah Stair at 330-639-8933 or by email at micah.stair@gp-radar.com.  We also have the capabilities of locating underground utilities, UST’s, and voids.

Concrete Scanning used to Locate Pre-Stressed Cables Prior to Core Drilling Holes inside a Nursing Home in Ann Arbor, MI

Ann Arbor Cover

It’s always essential to have as much information as possible prior to making any floor penetrations. There are many unknowns prior to core drilling holes in an elevated slab such as what type of reinforcing steel is present, potential for beams being in the area & embedded conduits possibly passing through proposed coring locations. Ground Penetrating Radar (GPR) is an excellent source to provide some answers to those unknowns.

A general contractor had a project inside a nursing home being renovated in Ann Arbor MI where they had to core drill numerous holes in an elevated slab. The nursing home was being transformed in to an updated space for the residents. The new plans had bathrooms, sinks & janitor closets that were going to be added along with numerous floor boxes. The contractor had to connect the new plumbing to the existing plumbing on the floor below. They also had to connect new electrical for the floor boxes. Before making any floor penetrations, the contractor needed to know the type of floor that was present & if any existing utilities were in the slab. Ground Penetrating Radar Systems of Ann Arbor MI was contacted to scan the areas for the future floor penetrations. While scanning in real time, GPRS was able to determine the concrete slab was of hollow core construction. That was important information since hollow core slabs have pre-stressed cables that run in the grouted portions of the slab. It’s essential to avoid cutting any pre-stressed cables when core drilling since doing so would compromise the structural integrity of the floor & could potentially injure the drillers. GPRS was able to mark the hollows directly on the surface & explained to the plumbers to core drill in the hollow portions (labeled by the H). The project was able to continue without having any setbacks.

Ann ArborIt’s always a good practice to scan prior to core drilling or saw cutting concrete structures. Please contact Regional Manager of Michigan, Thaddeus Bullock, for more information on the capabilities of GPRS at 734.377.4551 or Thaddeus.bullock@gp-radar.com.

 

GPRS Locates Electrical Conduits at Kent State University

On December 19th 2016, Ground Penetrating Radar Systems (GPRS) was requested on site by a general contractor to perform a Ground Penetrating Radar (GPR) survey at Kent State University.  The contractor needed to saw cut a trench to install new sanitary lines to replace the existing sanitary.  The contractor needed to know if there were any conduits in the area to avoid saw cutting through them.  GPRS located many live electrical conduits that would have been damaged during saw cutting operations.  The conduits were painted on the surface with depth indications so that the contractor could safely saw cut over or around them without hitting the conduits.  The site had no knowledge of the electrical conduits found.  Without GPRS on site, there could have been serious damage to the electrical lines.  Before you saw cut or core drill, call GPRS to know what’s underground!

The picture below shows live electrical conduits in red along with the contractor’s saw cutting in orange.

Kent State University1
Kent State University2

Equipment

Equipment

Ground Penetrating Radar (GPR)

  • GSSI SIR – 3000
    • GPRS uses a Geophysical Survey Systems Inc. (GSSI) SIR-3000 Radar unit. This is the most advanced GPR available. It allows for onsite interpretation, as well as stores data for later processing. This equipment is self-calibrating, allowing more precise depth and location measurements.
  • 1600 MHz Antenna
    • This antenna allows data collection to a maximum depth of approximately 18”, depending on concrete conditions

Ground Penetrating Radar Systems is the best way to ensure the locations of reinforcement and conduits prior to saw cutting/drilling through concrete.  For more information on how GPRS, Inc. can help you on your next project, please contact Micah Stair at 330-639-8933 or by email at micah.stair@gp-radar.com.  We also have the capabilities of locating underground utilities, UST’s, and voids.

GPRS Locates Rebar at the Akron Children’s Hospital

On November 29th, 2016, Ground Penetrating Radar Systems (GPRS) was requested on site by a general contractor to perform a Ground Penetrating Radar (GPR) survey at the Akron Children’s Hospital in Akron, Ohio.  The contractor needed to saw cut and remove 2”-3” of the slab in multiple areas.  The contractor needed to know where the top and bottom rebar was as well as how deep they were to determine how much reinforcement would need to be removed.  GPRS located and marked the rebar with depth indications in the area of concern.  The contractor was told that the top rebar was 3” deep.  GPRS advised that the top rebar was only 1.5” deep.  The contractor was able to chisel down to expose the top rebar and confirmed that the rebar was only 1.5” deep.  Thanks to GPRS, the contractor was able to approve a 1” cut to prevent the rebar from being saw cut.   Call GPRS before you saw cut or core drill the concrete to prevent reinforcement or conduits from being hit!

Below are pictures of the areas scanned with the top (dashed lines) and bottom (solid lines) rebar marked on site.

GPRS Locates Rebar at the Akron Children’s Hospital1

GPRS Locates Rebar at the Akron Children’s Hospital2

Equipment

Equipment

Ground Penetrating Radar (GPR)

  • GSSI SIR – 3000
    • GPRS uses a Geophysical Survey Systems Inc. (GSSI) SIR-3000 Radar unit. This is the most advanced GPR available. It allows for onsite interpretation, as well as stores data for later processing. This equipment is self-calibrating, allowing more precise depth and location measurements.
  • 1600 MHz Antenna
    • This antenna allows data collection to a maximum depth of approximately 18”, depending on concrete conditions

Ground Penetrating Radar Systems is the best way to ensure the locations of reinforcement and conduits prior to saw cutting/drilling through concrete.  For more information on how GPRS, Inc. can help you on your next project, please contact Micah Stair at 330-639-8933 or by email at micah.stair@gp-radar.com.  We also have the capabilities of locating underground utilities, UST’s, and voids.

GPRS Ensures Safe Excavation

Ground Penetrating Radar Systems (GPRS) Inc. of Pittsburgh was contacted by the owner of a private residence to locate utilities on the property to ensure safe excavation for the installation of a retaining wall around the driveway.

Ground Penetrating Radar (GPR) was used to locate the existing gas lines from the valve near the street to the gas meter at the house.  The GPR was able to clearly see 4 feet into the ground to locate the line at 2.5 feet.  A foreign line was also located which, when excavated, turned out to be an inactive gas line that was previously replaced.  Both of these lines crossed into the work area which, if left undetected, could have potentially led to a dangerous accident.

For this residential utility locate job, the GPRS technician also used radio detection and induction methods to locate the water line and sewer lines into the home.  These methods require the technician to directly connect to a conduit with wire passing through it or a metal line and send a signal along it.  The water and sewer lines were found to not pass through the work area, giving peace of mind that no interaction with these utilities was possible and costly accidents due to hitting these lines were not going to occur.

Using these methods, the GPRS technician was able to locate the gas lines, water line and sewer line at the residence.  With the field markings clearly in place and communicated with the owner and the construction foreman, excavation was able to be completed quickly and safely.

Water line located using induction method and flagged to indicate path.

Water line located using induction method and flagged to indicate path.

In construction, professionalism is everything, and completing your projects without incidents can make or break your bottom line. When you are excavating, it is important to have utilities privately and publicly located. Utilizing GPRS for your project will help reduce injury, increase productivity, and maintain incident-free professionalism that your clients demand.

GPRS uses the latest and greatest technology to locate power lines, fiber lines, water lines, UST’s, storm drains, and sewer drains under the surface. Utilizing GPRS on your project can help mitigate costly repairs, prevent severe injuries, and maintain the integrity of your project.

Ground Penetrating Radar Systems of Pittsburgh is available to service the private utility locating and concrete scanning needs of Western Pennsylvania.

Urgent Request Met By GPRS Technicians At Pittsburgh International Airport

Ground Penetrating Radar Systems (GPRS) Inc. was contacted to locate underground utilities by a construction company that is completing an overhaul of the communications and power stations around the Pittsburgh International Airport.

An urgent request was made by the contractor to have a same day underground utility locate done, and with over 150 GPRS technicians across the country, the request was met by the GPRS technicians out of Pittsburgh.

The job required the location of an underground power line that would be tapped into and run directly to the energy shelter to reduce redundancy and material.  Ground Penetrating Radar (GPR) along with passive and direct connect radio detection were used to locate the power line and the communication lines that crossed through the prospective trench dig path.

The GPR and direct connect radio detection methods were able to accurately locate the position of four underground lines that would impact the project.  Along with location, GPRS technicians were able to determine the depths of the lines as well.  Knowing the location and depths of the lines helped the contractor save time and eliminate potential stress, injury and additional costs for this project.  Communicating with the contractor and documenting the utility locations with clear and accurate field markings and site photos were helpful methods to ensure the safe completion of the project.

pittsburgh

In construction, professionalism is everything, and completing your projects without incidents can make or break your bottom line. When you are excavating, it is important to have the utilities privately and publicly located. Utilizing GPRS for your project will help reduce injury, reduce lost productivity, and maintain incident-free professionalism that your clients demand.

GPRS uses the latest and greatest technology to locate power lines, fiber lines, water lines, UST’s, storm drains, and sewer drains under the surface. Utilizing GPRS on your project can help mitigate costly repairs, prevent severe injuries, and also maintain the integrity of your project.

Ground Penetrating Radar Systems of Pittsburgh is available to service the private utility locating and concrete scanning needs of Western Pennsylvania.