One piece unit no stapling, taping or banding. Unit is self locking.
Ends are closed no need for end closures. No leakage of concrete.
High vertical strength 1200 pounds per Sq. Ft.
Lateral stability no side bracing required.
Box Voids can be used to create a void area under load bearing beams or slabs allowing space for soil expansion.
Box voids can be quickly and easily assembled on site with no special tools. They are available in the following sizes: 12" wide by depths of 4" and 6" by 4'-0 lengths. They are made from double faced corrugated fiberboard, wax coated and laminated.