There are many ways of covering a surface. This paper describes the solution adopted for a prototype of an archaeological excavation shelter in Bibracte, France. A nexorade or reciprocal frame system covered with fabric has been designed by French architect Paul Andreu and French engineers Bernard Vaudeville and Simon Aubry (RFR first stage and T/E/S/S second stage). The shelter was built in 2008 and is currently in use.