Two sets of eight and seven wooden patterns of frames / ribs used for the shipbuilding of flat bottomed lagoon boats called
respectively "topeta" and "batela" in Venetian. The pattern sets date back to the first half of the 20th century. Dimensions: the floor (the flat and horizontal part, called "piana" in Venetian) have a length ranging from a minimum of 122 cm to a maximum of 140 cm, the frame (the vertical arched part, called "sancone" in Venetian), from a minimum of 85 cm to a maximum of 115 cm.