Concrete Chairs & Rebar Spacers

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Frequently Asked Questions

All concrete chairs must support a minimum load of 200 kg and be manufactured from corrosion-resistant materials like high-density polyethylene or galvanized steel. Saudi authorities mandate load certification certificates to guarantee proper rebar positioning and consistent concrete cover thickness across all commercial and residential projects.
Fix chairs directly onto rebar intersections using heavy-duty clips, maintaining a standard spacing of three per square meter. Matkel chairs feature anti-slip designs that withstand heavy worker loads and fresh concrete pressure. This ensures stable cover thickness despite extreme summer heat and humidity in Saudi cities.
Concrete chairs elevate bottom reinforcement grids to maintain uniform slab cover, while side spacers lock bars against formwork walls. For columns and corridors, side spacers paired with 10 to 12 mm reinforcement bars are highly recommended. They prevent mortar leakage and guarantee precise structural alignment.
Material quality directly dictates structural longevity. Low-grade plastics often warp under intense UV exposure, leading to inadequate cover and rebar corrosion. Premium chairs preserve exact cover thickness, effectively blocking moisture and chloride intrusion. This meets strict Saudi engineering contract durability standards without requiring future replacements.
Multiply the total area by the standard density of three to four chairs per square meter, then add a 10 percent buffer for columns and corner reinforcements. Purchasing full cartons significantly reduces unit costs. Always verify that chair dimensions match your specified slab thickness before final delivery.
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