Issue 47

M. Marchelli et alii, Frattura ed Integrità Strutturale, 47 (2019) 437-450; DOI: 10.3221/IGF-ESIS.47.34 444 mesh system requires a sudden maintenance, while A1 identifies a partial loss of functionality that can be recovered in larger times. In addition, the number of damaged components directly relates to the extent of the required intervention works. Component Local or potential damage CoI Wire mesh Significant amount of debris in the foot of the slope Presence of debris in the mesh Presence of weeds, bushes or trees interacting with the mesh Lacerations in the mesh Deformations or bowing of the mesh Presence of corrosion and/or removal of the corrosion protections of the mesh C3 C2 C2 C3 C3 C1 Top rope Absence of the rope Presence of corroded zones and/or significant damage of the rope Absence of the anchors Missing rope-anchors connection elements Corrosion of the anchors Damage on the plate and/or on the head of the anchors Unthreading of the anchors C3 C3 C3 C3 C1 C2 C3 Bottom rope Presence of corroded zones and/or significant damage of the rope Partially visible rope as hidden by debris/vegetation Absence of the rope Non-visible anchor Absence of the anchors Missing rope-anchors connection elements Corrosion of the anchors Damage on the plate and/or on the head of the anchors Unthreading of the anchors C2 C1 C2 C1 C2 C2 C1 C2 C2 Intermediate ropes (if present) Presence of corroded zones and/or significant damage of the rope Partially visible rope as hidden by debris/vegetation Absence of the rope Non-visible anchor Absence of the anchors Missing rope-anchors connection elements Corrosion of the anchors Damage on the plate and/or on the head of the anchors Unthreading of the anchors C1 C1 C1 C1 C1 C1 C1 C1 C1 Connection between mesh panels Missing elements Presence of corroded zones and/or damages of the connection elements C3 C2 Mesh-top rope connection Missing elements Presence of corroded zones and/or damages of the connection elements C3 C2 Mesh-bottom rope connection Missing elements Presence of corroded zones and/or damages of the connection elements C2 C1 Mesh- intermediate ropes connection Missing elements Presence of corroded zones and/or damages of the connection elements C2 C1 Table 3: Classes of importances (CoI) for the assessment of the residual efficiency for all the considered components in simple drapery net systems (maximum equal to 113).