Failure Diagnosis

Detailed survey of all wooden covering elements allowed to determine the structure geometry and the failures listed below:

- large deformations were observed on the vault with relevant depression of its flat part;

- the connections of the chestnut trunks that constitute the tie beams underwent slips up to 11 cm in the lower trusses and 24 cm in the upper trusses;

Figure 7. Flat vault suspended to the trusses.

- almost all tie rods, which connected the vault to the tie beams of the upper trusses, were highly stretched to advantage of the ones (almost all released) that connected the vault to the tie beams of the lower trusses;

- the most part of trusses joints had inadequate connections;

- more bars were highly deflected (tie beams and struts), twisted or disjoined;

- the most part of the trusses had lack of planarity;

- local deformations were observed on the lower covering flush coat;

- compression cracking of masonry was localized near the truss supports;

- some wooden elements were locally rotten or subjected to biological attacks;

- some tie beams and struts were cracked;

- wide water infiltrations were concentred in small zones of the covering.

A zone of the flat vault suspended to the lower trusses can be observed in Figure 7.

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