Your Source for concrete accessories

Dependable • Quality • High Strength

Industry Focused Products

Concrete Dobies

The term “Dobies” has become the trade name for concrete rebar supports over these last fifty years.

They come with, or without tie wire inserted in the concrete brick. We manufacture these in regular strength, 4000 PSI mix design, or higher strength for specific jobs.

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Form Supports & Spreaders

These are typically used by general contractors in bridge decks and other concrete forming applications. They come in longer sizes such as 24” or 48”, and depending on length, will be reinforced with rebar. Form supports are also stocked in 5”, 5 ½”, 6”, and many other heights.

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Plastic Spacers & Wheels

We first designed the On Grade Square Chair application almost thirty years ago under a different name. Now we have three plastic chair types: Square Chair, Tilt Chair, and Hi Chairs.

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Slab Bolster

We spared no expense on the new bolster, and have re-engineered the buckles.

Available in both boxes or pre-assembled in 10’ lengths, we have had incredible success with the new and improved bolster. Currently, we do not manufacture a lightweight-use bolster, but have chosen to provide a super strong slab bolster to meet the demands of the toughest commercial projects. Available with or without staple down legs.

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Marketplace leaders

Concrete Accessories for all jobs, large and small

ICP continues its legacy of innovation 25 years after developing the industry’s original plastic on-grade chair.


By definition, to be dependable means to be trustworthy and reliable. You can count on us at ICP. We boast the largest inventory of dobies in the country, ready to ship when your order is placed. If you’ve ever been told you have to wait for dobies, the word wait is not in our vocabulary.


We test our mix designs daily to ensure that your orders meet the criteria you expect. Our plastic parts are free of flash and produced from injection molds with the latest technology.

High Strength

Our regular strength dobies will average a compressive strength between 4,000 and 5,000 psi. We regularly stock higher strength dobies for DOT work in many sizes. Our range of bricks, dobies, and form spreaders is the largest inventoried product line in the industry. For our line of plastic bar supports we use engineered resins and our load strengths are among the best in the industry.

50 Strong Years of manufacturing excellence

50 Strong Years

of Manufacturing Excellence

ICP has a long-running legacy of innovation in the concrete accessories industry. Starting in 1966, George Hartzheim founded our first concrete company, manufacturing dobies for the rebar fabricators and placers. Since the inception of the company, the rebar fabricator and placer was our primary product for concrete reinforcement. Today we continue the legacy of innovation with new products and new markets. We service dealers and contractors nationwide with high quality concrete spacers, plastic spacers, rebar ties, slab bolsters, and more. If you’re looking for a supplier with a proven history and excelling in performance, look no further. 

100% made in the usa

Plastics use 100% recycled material

Resources for Concrete Reinforcement

Concrete Construction During Economic Uncertainty

As we deal with tough and unsure times, developments and improvements keep the concrete market moving forward. These have certainly been a few of the strangest and most difficult days modern Americans have ever faced. While some concrete contractors have had the fortune to keep working despite the pandemic quarantine, others have seen tasks halted. Whether you’re working consistently or trying to find out how to jump-start your business upon a return to normalcy, now might be an exceptional time to learn more about the current technologies, innovations, developments, and skilled ideas that are driving the industry forward. New Technologies: Robotics, Big Data, and More From robotic demolition that allows big work in tight spaces to state-of-the-art atomized dust suppression machines, brand-new technological innovations increase

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Dos and Don’ts of Tying Rebar

The Do’s and Don’ts of Tying Rebar

At a glance, the process of tying rebar may look easy. However, the reality is that is it quite a lengthy and complicated process. While it isn’t exactly rocket science, there are still a lot of things one needs to take into consideration when tying rebar. Do it improperly, and you risk endangering the entire integrity of a structure. In this short guide, we highlight the dos and don’ts of tying rebar. The Dos Do Your Homework Do your homework on what sizes, configuration, and placement of rebar will be required, as well as what type of chairs would be best for the job. Both concrete and plastic chairs have their pros and cons, and it will depend on your situation and budget in deciding

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