The new factory in Lessay accomodates an assembly line for racing cars as well as administrative and exhibition areas. The building has a steel skeleton frame with alternating axes at 5 and 10m centers. A membrane roof construction suspended from steel columns allows daylight to illuminate the central zone, extending over the whole length of the building. The membrane is braced in radial form at the 'crests' where it is held by steel caps. It is fixed to a longitudinal tubular space frame and to a lateral tubular element set within a U-section sheet steel arch. The PVC-coated polyester membrane is impregnated an the upper face.