For very thick mats.
Double mat rebar.
Choose the method you will use to tie the rebar.
Haala industries offers a complete line of prefabricated and preformed rebar reinforcement mats including base mats centered and eccentric cover mats box culvert reinforcement pib mats con frame and catch basin mats.
The professionals at whitacre engineering can help you select the right bar supports to prevent problems enhance durability and maintain structural integrity.
Multi level chairs are used on mats or other configurations that involve multiple layers of steel the multi level chairs can be placed at multiple heights allowing you to install a bottom layer an intermediate layer and a top layer maintaining proper spacing between all of the rebar layers.
Per code section 7 12 2 2 the bar spacing.
When used with sand plate.
Reinforcing bars need to be precisely and accurately located to adhere to design specifications.
Multi level rebar chairs.
Standard concrete gray color custom colors available inquire minimal surface contact designed for maximum aggregate flow and concrete consolidation.
Single mat rebar or wire mesh bottom layer double mat rebar or wire mesh tilt wall side form spacer on grade.
Depending on the layout configuration the reinforcing bars can be placed in two layers one mat or four layers two mats at both the top and bottom.
The latter are easier for novices to use but somewhat more expensive the former is often the choice of experience rebar tiers rodbusters.