The “Blue Box” meets the requirements of the brief by providing a flexible, low-cost, temporary structure with a pleasant internal ambience. The modular system consists of a basic unit 3 m wide and 9 m long. Three modules are combined here to create a single structure 9 x 9 m on plan with a room height of 2.50 m. The elements are laid on a supporting base, consisting of three beams. The wall, roof and floor panels are in timber-frame construction with insulation. To reduce the span of the minimally sloping roof, a row of columns was inserted along the middle of the space. A room-height window can be installed in every module, with pivoting louvres to provide sunshading. The system can also be used for exhibition or information pavilions.