Two-layers jacketing for column drums

Strengthening and repairing of archaeological handmade are very important issue for structural engineers, and require specific techniques fully consistent with needs of arts prevention. Interventions of rehabilitation are often invasive, they operate directly on the structure changing appearance, so they are not acceptable in application to relevant archaeological constructions. On the other hand, durability of materials used in restoration and preservation of archaeological arts is a very relevant aspect of the design process. In the present paper, a jacketing technique for multi-drum classical columns is presented. In particular, some aspects related to structural design of belts and to limitation of stresses on stone surfaces are discussed. The technique is based on utilisation of metallic belts and elastomeric pads, able to avoid direct contact between belt and stone, reduce localisation of stresses due to surface irregularities and ensure a full reversibility of the intervention.