How to choose a rebar spacer: slab chair, chair or star

2026-10-14

Which spacer suits a floor slab, a ground-bearing foundation or a wall — and how to size it for the concrete cover.

The choice depends on the base, rebar position and the design concrete cover.

Horizontal rebar

On loose bases use “Nastil”; its wide footprint keeps it from sinking. On concrete use “Stiika”, “Zashchipka” or “Zasuvka”.

Vertical elements

For walls and columns use “Zirochka”, which fits 6–16 mm bars and keeps an even cover all around.