The company Travelli srl, thanks to its many years of experience, expands its qualification certification for the execution of public works in 2019 with the increase of new rankings in addition to the already existing ones (such as the OG1 and OG2 Qualification) in fact it has acquired the newcategory OG11 for the construction of technological systems, obtaining the qualification for design and construction perfomance up to the V ranking, thus making TRAVELLI srl with the same categories, among the forts companies operating in Tuscany.