The Aka seesaw was designed as seating furniture for the campus of the State Academy of Fine Arts. The 7 m long and 2.40 m wide seesaw has a stepped seating area on both sides. Wooden frames made of 15 mm thick OSB panels form the substructure. The seating area is spanned by a roof made of plastic sandwich elements with herringbone folding structure. The standard sandwich panels were cut to size as individual elements, the intermediate layer was reinforced along the edges and glued together flush. The folding gives the roof surface increased rigidity, so that with a material thickness of only 26 mm a length of 7.0 m can be spanned self-supporting.