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Customized Construction Accessories Plastic Rebar Support Plastic Chair Concrete Rebar Spacer
Plastic Rebar Chair for concrete support are used to support the rebar mats or cages at the desired heights in order to achieve proper concrete coverage and maximize the benefit of reinforcing steel.
Plastic Rebar Chair are made out of durable non-corroding high density plastic which is both strong and light. Our rebar chair systems cannot change shape and will provide uniform concrete cover.
Plastic Rebar Chair for concrete support can be used in tilt up and slab work. They are stable and economical. Its fastening system is strong and versatile. 
♦ High strength and good stability. Corrosion and rust resistant. Durable and long service life.
♦ Certificate: ISO 9001, SGS.
♦ Package: By Pallet suitable for sea transportation or as requested.
♦ OEM service available.
♦ Samples are available.
| Item No. | Concrete cover | For bar diameter | ||
| MM | INCH | MM | #=2.54MM | |
| JFSLZ1-01 | 25/30mm | 1"-1 1/4" | 6-20mm | #2-#8 |
| JFSLZ1-02 | 25/40mm | 1"-1 1/2" | ||
| JFSLZ1-03 | 40/50mm | 1 1/2"-2" | ||
| JFSLZ1-04 | 50/65mm | 2"-2 1/2" | ||
| JFSLZ1-05 | 65/75mm | 2 1/2"-3" | ||
| JFSLZ1-06 | 70/80mm | 2 1/2 "-3 1/4" | ||
| JFSLZ1-07 | 75/90mm | 3"-3 1/2" | ||
| JFSLZ1-08 | 85/100mm | 3 2/5"-4" | ||
| JFSLZ1-09 | 90/100mm | 3 1/2"-4" | ||
1. We are ODM&OEM, design according to your drawing.
1. Tooling (Mold) design and Manufacture.
* We have specialized QC testers to check the quality of the products according to different customers
Material Testing:
Raw material certification and batch testing
UV stability testing per ASTM G154
Compression strength testing
Chemical resistance verification
Temperature cycling tests
Production Control:
Precision injection molding equipment
Consistent wall thickness control
Dimensional accuracy verification
Color consistency monitoring
Regular mold maintenance
Performance Validation:
Load testing to failure
Long-term durability testing
Installation performance testing
Compatibility testing with various rebar types
Field performance validation
Certifications:
ISO 9001:2015 Quality Management
ISO 14001 Environmental Management
CE Marking for European markets
Local regulatory compliance
Q: What materials are your chairs made from?
A: Our primary material is High-Density Polypropylene (HPP) due to its excellent strength, durability, and chemical resistance against the alkaline environment of wet concrete. For heavy-duty applications, we use Reinforced Nylon Composites. All materials are UV-stabilized for outdoor storage.
Q: How do I choose the correct height for a rebar chair?
A: The chair height equals the required concrete cover (e.g., 40mm cover needs a 40mm high chair). This is specified in your structural engineering drawings or local building codes. We offer a wide range of standard heights and can produce custom sizes.
Q: What is the load capacity of your chairs?
A: Load capacity varies by product type, size, and material. Our standard HPP chairs typically support 50-200kg, while heavy-duty reinforced chairs can handle 200-500kg. We provide specific load ratings in our technical datasheets. Always ensure the chair's capacity exceeds the expected load from the rebar grid and concrete pour.
Q: Are your products resistant to chemicals in concrete?
A: Yes. Our HPP and Nylon materials are highly resistant to the alkaline environment (high pH) of fresh and cured concrete. They will not corrode, rust, or degrade, unlike metal alternatives, and will not cause staining or spalling.
Q: Do you have products for special applications like columns or beams?
A: Absolutely. Beyond standard slab chairs, we offer:
Wheel/Cylinder Spacers for walls and columns.
Beam Bolster Chairs for supporting bottom rebar in deep beams.
High Chairs for foundations and thick slabs.
Continuous Line Chairs for supporting multiple parallel rebars.
Q: What information do you need to provide a quote?
A: For an accurate quote, please provide:
Product Type & Model (e.g., Standard Slab Chair, Heavy Duty Wheel Spacer).
Height/Size required.
Estimated Quantity for the project.
Color Preference (if any).
Any special requirements (custom markings, packaging).
Q: What is your Minimum Order Quantity (MOQ)?
A: Our standard MOQ is 10,000 pieces for common items to ensure production efficiency. For custom designs or special sizes, the MOQ may be higher (typically 50,000 pieces) to cover mold costs. We are flexible for large projects or ongoing partnerships.
Q: Can you produce custom sizes or colors?
A: Yes, we specialize in OEM and custom manufacturing. We can create custom injection molds for unique sizes, shapes, or integrated features. Custom colors are also available, often used for project or company identification. Please discuss your requirements with our sales team.
4. Quality & Compliance
Q: What quality standards do you comply with?
A: Our manufacturing is ISO 9001:2015 certified. Our products are designed and tested to meet relevant international standards such as ASTM A884, BS 7973, and EN 13670. We can provide test reports and certificates of compliance upon request.
Q: How do you ensure consistent quality?
A: We implement a rigorous quality control system:
Raw Material Inspection: Certified polymers from reputable suppliers.
In-Process Control: Monitoring of molding parameters (temperature, pressure, cycle time).
Dimensional Checks: Regular sampling against product drawings.
Performance Testing: Batch testing for load capacity and durability.
Q: Do you provide test samples or reports?
A: Yes. We can provide free samples of our standard products for evaluation. For project specifications, we can also supply load test reports and material certification from third-party labs if required.
Commercial Construction:
High-rise building foundations and slabs
Shopping center floor slabs
Office building structural elements
Parking garage construction
Industrial facility floors
Infrastructure Projects:
Bridge decks and abutments
Highway and road construction
Tunnel lining reinforcement
Dam and water treatment structures
Airport runway construction
Residential Construction:
House foundations and slabs
Basement wall construction
Driveway and patio slabs
Pool construction and surrounds
Retaining wall systems
Specialized Applications:
Nuclear and power plant construction
Marine and coastal structures
Historical restoration projects
Precast concrete manufacturing
Shotcrete applications
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