Issue 40

M. Mentzini, Frattura ed Integrità Strutturale, 40 (2017) 95-107; DOI: 10.3221/IGF-ESIS.40.09 98 Drum 4.4 The only remains of the member are three ancient pieces (see Figs. 1, 2 and 3). Figure 2 : The aforementioned complex is joined to a new supplement along the height of the drum (depicted in the foreground on the left). The final join was accomplished by inserting titanium bars which were parallel to the member’s upper side from the new fractured area created (for the sake of the volume’s formation). This reinforcement is the proper one in order to avoid overturning of each one of the two parts, before the overturning of the drum as a whole. The ancient fragments were captured between the two supplements. Also some of the reinforcement bars penetrate the fragments. Figure 3 : Sketch of the cross-section of the fractured surface of the drum between the two main supplements. The position of the inserted reinforcing bars is fully documented. It is noteworthy that some of the bars determined from the structural study, were re- placed by “Π” shape titanium connectors (highlighted by green colour) to avoid further loss of material. The combination of bars’ diameter (i.e. strength) and position provides the required stability moment. Drum 5.11 Only a part of the drum, less than one quarter of the original volume was maintained (symbolized by the letter B, see Fig.4). To restore the member and form the initial shape two supplements of mew marble were created (A and Γ, see Fig.4). The procedure includes first the join of the supplement A to the ancient volume B (Fig.5 on the left) and afterwards the join of