Heavy-Duty Plastic Chair Spacer

Product code: H25; H30; H35; H40; H45; H50; H55; H60; H65; H70; H75; H80

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

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, including H50 (50 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.

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Need assistance choosing cover height or wire-tied options? Product code H50 provides a 50 mm cover on this heavy-duty plastic chair spacer. For the standard rebar chair spacer range including R50 (50 mm cover), see the linked rebar chair spacers product.

Heavy-Duty Plastic Chair Spacer Sizes

Product Code	Concrete Coverage (mm)	Diameter (mm)
H25	25	6-50
H30	30	6-50
H35	35	6-50
H40	40	6-50
H45	45	6-50
H50	50	6-50
H55	55	6-50
H60	60	6-50
H65	65	6-50
H70	70	6-50
H75	75	6-50
H80	80	6-50

Product variations

Sizes and codes extracted from the legacy product table.

H25
Concrete Coverage (mm):
25
Diameter (mm):
6-50
H30
Concrete Coverage (mm):
30
Diameter (mm):
6-50
H35
Concrete Coverage (mm):
35
Diameter (mm):
6-50
H40
Concrete Coverage (mm):
40
Diameter (mm):
6-50
H45
Concrete Coverage (mm):
45
Diameter (mm):
6-50
H50
Concrete Coverage (mm):
50
Diameter (mm):
6-50
H55
Concrete Coverage (mm):
55
Diameter (mm):
6-50
H60
Concrete Coverage (mm):
60
Diameter (mm):
6-50
H65
Concrete Coverage (mm):
65
Diameter (mm):
6-50
H70
Concrete Coverage (mm):
70
Diameter (mm):
6-50
H75
Concrete Coverage (mm):
75
Diameter (mm):
6-50
H80
Concrete Coverage (mm):
80
Diameter (mm):
6-50

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. Cover options from 15 mm to 150 mm including R50 (50 mm); confirm the required size against your project specification.

Concrete Chair Spacers / Cover Blocks

Code: CR30

Concrete chair spacers — also called concrete cover blocks — 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 include CR30, CR40 and CR50 as listed in the product specification table.

Wheel Spacer / Circular Spacer

Code: WS36

Rebar wheel spacers — also called circular spacers — are plastic clip-on supports that 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.

Heavy-Duty Plastic Combination Chair Spacer

Code: C20

Heavy-duty 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.