Concrete Coring

“Our project presented unusual obstacles as it involved expanding a facility that was still in operation. At all times the Penhall crew was reliable and available to assist, plan, and resolve any of the tough challenges encountered during construction. They excelled in undertaking demanding tasks including saw-cutting concrete with embedded steel, performing large diameter to small diameter deep coring (all despite a zero contamination environment with strict fire prevention imposed by the client). From bidding and planning, to invoicing and payment, Penhall’s professional and courteous experts helped turn a difficult project into a success, Their Estimators and Field Technicians were always available and ready to mobilize in a moment’s notice to meet our demanding schedule. Penhall is a real pleasure to work with!” – DJ. Lancour, L. Baker Construction Canada, ULC, SC

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Horizontal concrete coring
Throughout the United States and Canada, Penhall offers core drilling (concrete coring) and has done so for many years. Core drilling is a necessary step at some point for virtually all concrete structures – Whether you need to make an opening for a manhole, install plumbing or electrical lines, or to pull a sample of concrete for testing, quality cores are a must. Thankfully for our customers, Penhall’s operators are highly-trained and have decades of experience under their belt when it comes to providing safe, quality work.

At Penhall, we strive to provide the best service possible for all your core drilling needs. Our dedicated team of professionals is outfitted with customized drilling equipment to safely and effectively drill holes through any hardened materials, no matter the size needed. We are able to effectively drill to any depth, in any condition, even in tight or confined spaces. No job is too big or small for our core drilling services.

When it comes to Penhall’s equipment and skill, we are able to apply whatever method is needed to achieve success for your project. Our Electric, Pneumatic, and Hydraulic drilling equipment is maneuverable and adaptable to meet the simple or complex demands of different drilling projects. Whether drilling by hand, using a stand, or operating one of our customized drills, Penhall is equipped to handle concrete core drilling projects of any magnitude, while ensuring quality work every time.

Basics of Core Drilling

Core drilling is a type of service in which a drill is used to remove a cylinder of material, called a core. Penhall utilizes diamond core drills in order to best cut through the concrete and additional material and ensure that the customer’s upmost satisfaction is met. This type of technique of concrete cutting is used in many cases such as but not limited to:

  • Walls, floor slabs, and ceilings for electrical and communication services, cabling, plumbing, or HVAC
  • Slab and roadway holes for doweling drilling, rebar tie-ins, or drainage
  • Recessed lighting and fixtures
  • Sample and analysis of material

IMG_3571However, no matter what the project is, the process to create the hole is virtually the same. In terms of the process, the operator first uses a small threaded anchor to secure the drill post to the wall and then bolts the drill post, which will act as a guide for the core drill itself. This bolting of the drill post allows for the core drill to hit its mark straight on and make one smooth, consistent core – no matter what angle.

Once the drill post is securely fastened, the next step is for the drill bit to be mounted. This drill bit can be to whatever size the customer specifies. We offer bits as small as 0.5” diameter and as large as 4’ in diameter. If Penhall doesn’t currently have the bit specified for your particular job, we are able to have a core bit custom manufactured to any diameter – no job is too small or large in size or scope.

After the drill is properly mounted, it is turned on while water is applied as coolant and pressure is placed on the crank. The hand crank on the core drill itself drives the drill to the surface and cuts through the concrete. Most drill cans are built to accommodate a depth of 12-14”, but can be any length if needed depending on the depth of the core. Also, if necessary, the core drill can cut through rebar steel. Once the surface and existing materials are penetrated, the core comes out with the bit, or the core can be pulled out manually if it is found in a slab. From there the coring of the hole is complete and additional holes can then be cored if need be.

“Penhall has worked with Sun Mechanical on many projects, but most notable was the remodel of the North End Zone at the University of Arizona stadium. Penhall core drilled dozens of pipe penetrations and saw cut numerous duct openings in existing and often finished surfaces on this project. Their people were professional and courteous, went about doing their work and cleaned up their work area to everyone’s satisfaction. Often times they were asked to respond with less than 4 hours’ notice. We perform millions of dollars of retrofit work for the U of A and Penhall is our “go to” company for core drilling and saw cutting.” – M. A. Kinseth, Sun Mechanical Contracting, Inc., AZ

GPR Scanning before Core Drilling

Here at Penhall, we pride ourselves on making sure that your jobsite, crew, and our team are assured the highest level of safety. When it comes to core drilling, it is important for our team and you as a customer to understand what we are core drilling through. Therefore, we make sure that our operators ask if any utilities are running in the path of the cut. However, in cases where there is not one hundred percent certainty of the area of which we are core drilling, we offer our non-invasive Ground Penetrating Radar (GPR) services to ensure that there will be no safety concerns or destruction of existing obstructions.

Our specially-trained scanning team uses the newest technology in order to give our customers fast, on-the-spot imaging that will reveal any electrical conduits or obstructions that might be of danger. This use of GPR allows for the operator to determine materials that should not be cut, mark the obstruction on the wall or surface, and drill in a clear place as to ensure the avoidance of embedded materials. When a Penhall operator employs such technology, you can be assured that no obstructions will be damaged once we core drill. Penhall’s expertise, experience, and top-of-the-line equipment allows for scanning to be a very safe and useful step in the core drilling process.

Another way that Penhall ensures that the highest level of safety is implemented is by making sure that our equipment is the highest caliber available. When it comes to core drilling for our customers, we utilize high quality anchor systems and fasteners, as well as certifying that all our operators who operate our core drills are extensively trained and qualified in proper mounting features. Penhall also cares about making sure that your jobsite is safe and secure in terms of environmental factors. If you need, we can protect any surrounding areas from water or slurry that can run off from this service. Dust control is implemented by the use of water and we vacuum all the slurry that is made. You can be assured that if you choose Penhall, your area will be left clean.

Core Drilling

Penhall operators are rigorously trained and have a wide range of knowledge and skills that can help with whatever core drilling job you might have. No matter the depth, diameter, or angle, we have you covered. So whether you need one 2” core drilled or fifty 4’ cores drilled, we can help. If you are in need of the highest quality core drilling services, please give us a call. We will be happy to give you a free quote on your next core drilling job.

“You guys did an awesome job. Penhall crew members arrived early for the coring job, assessed the situation and scope of work we needed done, jumped on it, and were well-equipped (and/or made due with what was available) to complete a tough job quickly, professionally, cleanly, and with a great attitude.” – J. Owens, Classic Paving Services, Inc., CA 

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