These concrete dobies have grooves built into them to create a cradle for the rebar to set in. This can create many usable dimensions from one brick. For instance, the 3 x 4 x 3 inch combo has an outside dimension of 3 inches by 4 inches. With the two grooves this product will provide cover heights of 2 ½”, 3”, 3 ½”, and 4”. All our concrete spacers meet standard PSI specs and can optionally be customized to add more strength for your specific rebar reinforcement needs.
Multiple cover heights.
Designed with multiple heights within a single unit.
Standard 4000 PSI (Additional strength available at added cost).
D.O.T. Approved (In most states).
Meets all requirements and qualifies as a CRSI Class 1 Bar Support.