“Fred” means flexible living in a timber container. This model is the younger brother of “Su-Si”, the first workshop-built mobile home the architects developed. Fred is somewhat smaller than the earlier version and can be more quickly assembled. The unit was delivered to the site only five weeks after the order was placed. The mobile home consists of two boxes, one of which is slid inside the other to form a 3 x 3 x 3-metre element that can be transported on an articulated lorry. On site, the two sections are drawn apart to form a living space with a floor area of 16 m2. The kitchen and bathroom cells and the entire electrical installation are incorporated in the container. After only two hours’ site assembly, the dwelling is ready for occupation. The closed box is set on four steel feet. Two bearers are then extended and supported on two further feet. Finally, the inner box is slid out by means of a chain drive. Metal gratings drawn up in front of the windows can be lowered to form a terrace. Fred is not conceived as a long-term dwelling, but it can be set up in a garden quickly and at relatively little cost as an office or additional living space when an existing house becomes too small. To create a completely independent unit, a connection to the public sewage system would be required.