ABSTRACT
The queen-post timber truss evaluated belongs to the roof structure of an old warehouse of Adico industry, located at Avanca (55 km South from Oporto). The exact date of the construction is not known but the industry exists since 1920 and some plans of the village from 1942 already show the warehouse. Trusses are the main elements of the roof structure, covered with ceramic tiles, 27◦ slopes and rafters spaced 50 cm over the purlins and the ridge. The free span of the trusses is 11.8 m and the average distance between their centres is 3.5 m.
