OEM Construction Plastic Rebar Spacer Cap Plastic Rebar Chair

A Plastic Rebar Chair is a pre-formed component used to accurately support and fix reinforcement bars (rebar) in place prior to concrete pouring. Its primary functions are: To Ensure Concrete Cover: It positions the rebar at the specified height to maintain the correct concrete cover-the distance between the rebar and the formwork. This is critical for structural durability, corrosion protection, and fire resistance. To Stabilize the Rebar Cage: It prevents rebar from shifting, sinking, or defor

Key advantages include: High Strength & Durability: Made from engineered polypropylene (PP) or polyethylene (PE), they offer excellent compressive and impact strength, and are less prone to crumbling or breaking. Dimensional Accuracy: Factory-produced for consistent height and performance, ensuring uniform concrete cover. Non-Magnetic & Non-Conductive: Ideal for structures requiring electromagnetic neutrality, such as MRI suites, laboratories, or sensitive electronic facilities. Lightweight & Ea

Our chairs are manufactured from virgin, modified Polypropylene (PP) or High-Density Polyethylene (HDPE), formulated for optimal strength and longevity. The material is non-corrosive, non-toxic, and does not react with concrete. Most of our products are 100% recyclable, aligning with sustainable construction practices.

Selection is based on two critical parameters: Required Concrete Cover: This is the design-specified distance from the rebar surface to the finished concrete face, as per structural drawings. The chair's height (H) should match this required cover minus the diameter of the lower rebar (if supporting an upper layer). Refer to our sizing chart for guidance. Load Capacity: Choose a chair with a safe working load (SWL) rating that exceeds the anticipated dead weight of the rebar mat, workers, and we

Load capacity depends on the rebar spacing and diameter. Standard chairs typically support 150kg to over 500kg. For heavy-duty applications (e.g., thick slabs, large diameter rebar), we offer Heavy-Duty and High-Chair models with enhanced rib design and load ratings. Consult our technical datasheets or our team for project-specific advice.