Heavy-Duty Plastic Combination Chair Spacer

Product code: C20; C30; C40; C60

Contact Konsa for pricing and availability. Specifications are confirmed during enquiry.

Konsa heavy-duty plastic combination chair spacers provide several cover heights from a single spacer, simplifying stock selection across slabs, walls, columns and precast concrete work. The compact formwork contact area and support for rebar from 6 mm to 40 mm make them a practical alternative to fibre-cement spacers. They can be supplied with or without galvanised binding-wire ties for faster placement and secure positioning.

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Unsure whether a combination chair or fixed-cover spacer is best? Our team can help select cover options and tying preferences for your project.

Specifications

Product Code	Concrete Coverage (mm)	Diameter (mm)
C20	20/25/35/35	6-40
C30	25/30	6-40
C40	40/40/45/50	6-40
C60	60/60/75/75	6-40

Product variations

Sizes and codes extracted from the legacy product table.

C20
Concrete Coverage (mm):
20/25/35/35
Diameter (mm):
6-40
C30
Concrete Coverage (mm):
25/30
Diameter (mm):
6-40
C40
Concrete Coverage (mm):
40/40/45/50
Diameter (mm):
6-40
C60
Concrete Coverage (mm):
60/60/75/75
Diameter (mm):
6-40

Related products

Rebar Chair Spacer / Cover Block

Code: R15

Konsa rebar chair spacers support horizontal reinforcement in suspended slabs, beams and floor slabs while maintaining the specified concrete cover. The concave seat accommodates rebar from 6 mm to 40 mm, with cover options from 15 mm to 150 mm. Sizes from 60 mm to 100 mm are manufactured with a wider base for improved stability on softer supporting surfaces. Typical usage is approximately 2–4 spacers per square metre, subject to the reinforcement layout and project requirements.

Concrete Chair Spacers / Cover Blocks

Code: CR30

Konsa concrete chair spacers provide stable support for reinforcement while maintaining the required concrete cover. Manufactured from 32 MPa concrete and supplied with blackened wire ties, the spacers are water-cured for 15 days and dry-cured for a further six days to develop their intended strength. Available cover sizes and spacer diameters are listed in the product specification table.

Heavy-Duty Plastic Chair Spacer

Code: H25

Konsa heavy-duty plastic chair spacers support horizontal reinforcement in slabs and precast concrete applications. Their small contact area helps minimise the visible footprint against the formwork, while the concave seat accommodates rebar from 6 mm to 50 mm. Cover heights range from 25 mm to 80 mm. Spacers can be supplied with galvanised binding-wire ties by adding “W” to the product code, and custom sizes are available subject to manufacturing requirements.

Wheel Spacer / Circular Spacer

Code: WS36

Konsa plastic wheel spacers clip onto reinforcing bar to maintain consistent concrete cover around vertical reinforcement. The circular design provides support through 360 degrees, making these spacers suitable for columns, walls and beams. Multiple models are available for different rebar diameters and cover requirements; select the correct product code from the specification table for the reinforcement used on the project.