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Rebar Chairs

Rebar Chairs Collection: Top-Quality Concrete Spacers

Rebar Chairs are a time-tested solution for all your concrete reinforcement needs. They provide reliable support and spacing for your rebar, ensuring proper concrete cover and alignment…Read more.

Whether you're a professional contractor or a DIY enthusiast, Certified MTP is committed to providing high-quality concrete spacers designed to meet all your concrete needs. 

Explore the features of our collection of the most popular, top-quality concrete spacers below or shop Certified Material Testing Products for other concrete support tools.

3in Rebar Spacer Wheels For 3-6 Bar (120/Ct)

Hercules 911, 1-1/2 In. Rebar Chair (50-Pack)

Rebar Impalement Safety Cover Protection For Rebar #3-#8 (100/Ct)

Dayton Superior HC Rebar Individual High Chair, 2" Plastic Dipped (Case Of 100) 

Hercules 924 Rebar Footer 3-Bar Chair (30-Pack)


The rebar holder helps keep the rebar in place when you're pouring concrete. 

Some of the advantages of these, sometimes called rebar seats, includes:

  • It makes concrete more resistant to failure by several times.

  • It gives tensile strength, allowing it to last much longer during construction.

  • It provides far better support to hold rebar and for structural concrete structures than any other conventional alternative, including reinforcing fiberglass, steel wires, or wire tying.

Other Concrete Support Accessories

For all of your rebar projects, Certified MTP has support systems for many different concrete applications. Our 2-inch rebar support chair is the most popular choice. In addition, we offer every elite brand manufactured in the US, such as Deslauriers, Paragon Products, Dayton Superior, Hercules, Mako, Lotel, and Rebar Support Products.

Unibar Centralizer

A unibar centralizer supports cage alignment for concrete or  other reinforcement. Typically made of non-corrosive plastic, these durable tools are used to achieve proper design ability and ensure quality.

Steel Plated Rebar Cap

Made to fit all rebar sizes, rebar caps are used to comply with safety requirements and local regulations. Plastic caps are placed on the end of vertical rebar and other exposed areas of plastic, to protect workers from abrasions, cuts, and other injuries.

Rebar Spacer Wheel For Wire Mesh And Wire Tying

In concrete applications, where vertical concrete armchair is used, spacer wheels keep the rebar in the center of the area where the concrete will be poured. Rebar spacer wheels are often made from metal and are essential in keeping wire mesh and rebar in place for concrete wall reinforcement.

FAQs about Rebar Chairs:

Have questions about the right rebar chair and its usage? You're in the right place. Below, you'll find answers to some of the most asked questions construction professionals like you want to know.

What is rebar spacing used for when concreting?

The rebar is laid in a grid format, and spacing of rebar ensures the even distribution of reinforcing steel reinforcement, preventing cracks and structural weaknesses in concrete. This is why the chair is sometimes called a concrete bar stool.

What material is used in making rebar spacers?

The materials used in making rebar spacers can be divided into three raw categories:

Concrete spacers for rebar
Plastic spacers for rebar
Metal spacers for rebar
Deck footing rebar

Plastic spacers are utilized more frequently because they are corrosion-resistant and more affordable.

What Are Plastic Rebar Chairs Used For?

Plastic rebar chairs, also known as rebar support and concrete bar, is specially designed components for securing the pouring and holding embedded reinforcement bars in place as fresh concrete is poured and cured.

They come in many shapes, length. and rebar sizes. They are commonly used in:

Bridges and Bridge Decks
Roads and highways
Natural cement

Is a chair for rebar really necessary?

Plastic rebar chairs are crucial for holding rebar above the ground for stability. They provide stability, ensure optimum concrete flow when it is poured in, and reduce the job time. This helps ensure the structural integrity and longevity of the concrete structure.

Are there different types of plastic rebar chairs available, and how do I choose the right one?

Different types of commercially available rebar chairs exist, including the standard rebar support chair, rebar chairs menards, bar stool, or concrete bar, tip or round cap, plastic chair spacers, the multi-level chairs for rebar, etc. The right one will depend on several factors, including the surface type underneath the concrete, the type of concrete formwork, and the design specifications.

What number of chairs do I need for rebar?

The amount of rebar chairs needed will depend on the need of the concrete calculator. As a best practice, space them about 2 to 3 feet apart along about half the length of the rebar.

Does the rebar size or bar stools that I use matter?

Yes, rebar size matters as it influences the type and size of the rebar support you need for your project. If you require more power, you will need bigger pieces and longer length of rebar.

To learn more, read: How to Measure Rebar Diameters.

Does a rebar chairs have a weight capacity limit for supporting rebar?

The rebar chairs has weight capacity limits based on their design and material. Exceeding these length limits may compromise their effectiveness. Please read through our product specifications for guidance when making a selection.

How do I determine the appropriate size of a rebar support chair for my project?

To determine the correct size of a rebar support chair, you first need to determine the weight the chair bar will support from the upper reinforcement layer. Typically, the diameter of the reinforcement bars on a rebar chair is taken above 12mm. Refer to engineering guidelines and product information for proper sizing.

What is the appropriate chair spacing for rebar?

The appropriate rebar spacing of the chair varies depending on your specific specification, rebar size, and load requirement. Only laborers skilled in reinforcing steel placement should install rebar chairs. Nevertheless, on average, allow for one chair for each square meter of length.

To learn more, read: Concrete Testing: Rebar Spacing and Mesh Spacing.

Are there specific installation guidelines for rebar chairs?

There are specific guidelines to adhere to if you want to install rebar chairs properly. Hence, only workers skilled in rebar chair installation in concrete footings should install rebar chairs in order to achieve effective structure.

What are the advantages of using plastic rebar chairs over metal ones?

Industries all over are realizing the advantages of using plastic rebar chairs over metal bars for concrete reinforcement. There are many reasons to choose a plastic chair rebar over pouring concrete over metal ones, including:

Quick and convenient implementation
Low cost per unit
High power
Secure footing
Counter stools

Keep your projects ahead of schedule and under budget with plastic rebar chairs. These rebar supports are stackable for deeper concrete slabs and strong enough for workers to stand on during pours. Discard metal rebar chairs for cost-saving durability with plastic rebar chair supports.

Overview of Rebar Chairs

Rebar chairs, also known as rebar stands or supports, are essential tools in the industry, used for positioning and securing rebar (reinforcing steel bars) within concrete structures. The "100 chair," a notable design within this category, exemplifies innovation in rebar support systems. Here's an overview highlighting their function, utility, and design aspects:

Function and Utility Rebar chairs are designed to hold rebar off the ground and keep it positioned accurately within a concrete slab or structure. This ensures that the rebar is optimally placed for structural integrity when the concrete is poured. Knowing how to put rebar in concrete correctly is crucial for the integrity of a building's structure, and rebar chairs play a pivotal role in this process.

Materials and Designs Traditionally, rebar chairs are made from steel or plastic. Plastic rebar holders are increasingly popular due to their corrosion resistance and ease of use. Innovations in this field have led to various designs, accommodating different sizes and configurations of rebar.

Sustainability The concept of discarded chairs being repurposed as rebar supports is an intriguing idea in the realm of sustainable practices. While not a standard industry practice, it represents a creative approach to recycling and sustainable building.

Architectural and Design Significance Rebar chairs, especially designs like the "100 chair," have even found their way into exhibitions at places like the Triennale Design Museum, highlighting the intersection of technology and design aesthetics.

Importance in Structural Elements In any project, the stability of structural elements is paramount. Rebar chairs ensure that reinforcing bars are correctly positioned to bear tensile loads, which is vital for the structural integrity of concrete elements in buildings, bridge decks, and other infrastructures.

In summary, rebar chairs are not just functional components but also represent a fusion of practicality and potential design innovation, crucial for maintaining the structural integrity of concrete installations.

Related Blogs for Rebar Chairs

Top Rebar Chairs for Concrete: Stability for Your Project

Choosing the Best Rebar High Chair

Footer Rebar: Stability in Foundation

Top Safety Caps for Rebar

Plastic Rebar Chairs

Rebar Chairs: Support for Concrete Reinforcement Projects

Rebar Wire Ties: Guide for Strong Concrete Reinforcement

Rebar Detection: Tools for Detecting Rebar in Concrete

How to Measure Rebar Diameters

Concrete Testing: Rebar Spacing and Mesh Spacing

Rebar Chairs for Footings: Stability in Concrete