The individual slabs are joined by a tongue and groove method
Slabs are twisted together with threaded rods with precisely chosen hardness and thickness (10mm), which pierce the board throughout the entire length in three appropriately designed distances from each other
The edges of the boards are made of semi-closed C profile which is galvanized
Boards are covered with a carefully selected impregnating film that protects against sticking of concrete products and maintains a constant humidity of the board