The arched roof is a system made up of standard trusses with a 29 cm square section and custom components, which allow the structure to be modular in width and depth. Its design makes it suitable for display in squares, shopping centres, city centres, sporting events and small events. Each installation must be provided with an adequate amount of ballast. The use of these systems is governed by laws which vary according to the country in which they are installed. They must be assembled in accordance with local regulations in force.