The waxed cardboard void former is placed over the bolt, standing on the plate washer. The cone is left in place whilst the surrounding concrete sets. This allows for the lateral, circular movement of the bolt, therefore lining up is much easier. Once the concrete is almost set, the cone can be twisted and removed. After the structure is fixed into position the void around the bolt can then be filled with grout.
We can also supply other types of void formers (sometimes known as bolt boxes). Please contact us to enquire about:
