Issue 40

M. Mentzini, Frattura ed Integrità Strutturale, 40 (2017) 95-107; DOI: 10.3221/IGF-ESIS.40.09 99 the unified complex of A+B to the supplement Γ (Fig.5 on the right). During these steps the join of these parts was ac- complished by inserting titanium bars parallel to the member’s upper side from the fractured - contact areas. This rein- forcement is the proper one to avoid overturning of the supplements as well as of the ancient remains, before the over- turning of the drum as a whole. Figure 4 : Sketch of the upper (left sketch) and lower (right sketch) side’s plan of the drum where the place of the two supplements (A highlighted by yellow and Γ by orange color) and the direction of the required reinforcement are depicted. On the right sketch the dotted lines correspond to the upper side of the ancient part. Figure 5 : Joining the supplement A to the ancient volume (on the left). The supplement Γ with the proper reinforcement on it, is ready to be joined to the rest of the drum (on the right). Drum 6.3 The ancient member almost maintains its shape, although two parts are missing: one, which forms a gap of wedge’s shape in the upper side of the drum and an adjacent one, which extends all over the drum’s height. In addition a crack runs across its lower side, which produces, as it was found out, an inclined fracture level (Fig.6a). The supplement used to fill the first mass loss is joined to the main volume by titanium bars which resist shear forces (one horizontal bar - Fig.6b and the remaining ones in different directions after the fitting of the two volumes using suitable cement mortar, from the upper side of the supplement - Fig.7a) to avoid sliding. The supplement used to fill the second gap is joined to the main