Four standard sizes differing in height and width but with the same length have very simple design. All sides can be opened. The four lateral sides are equipped with the hole formers to make holes in the finished products before they moving after moulding. The sides also have places for the hole formers and the screed holders which prevents sides deformation and can be taken off when demoulding.
The outer pans are U-shaped. When concrete is setting, the are removing and flipping for subsequent installation and connecting with similar pans to form the trays or tunnels. You can be sure that manufacturing of trays on Vladivostok very soon would be put into the assembly line.
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