Roof Renovation for "Locanda alla Posta" in Venice, Italy
In 2017, Torrone manufacturer in Dolo (VE) and owner of the former "Locanda alla Posta" inn Scaldaferro contracted Ri-Legno S.r.l., a leading company in timber reconstruction, to address the building's 17 m x 16 m timber roof.
Locanda alla Posta Srls
Via Cà Tron, 33
30031 Dolo, Italy
|Structural Planning and Construction||
Via della Cooperazione, 163-167
38123 Trento, Italy
|Architectural Design||Arch. Carlo dalla Pace|
Structural DesignThe Ri-Legno planning office designed the structural framework using the structural analysis software RFEM and the add-on modules RF-DYNAM Pro for evaluating the structure's dynamic behavior and RF-TIMBER Pro for the load-bearing timber member design.
The roof geometry considered the existing construction scheme: Piedmontese timber roof trusses (orditura alla piemontese) and Italian roof trusses (capriata all'italiana). The roof trusses have a span around 17 m and include struts providing intermediate support to the rafters. The rafters running perpendicular to the ridge line support the roof covering with slab-like hollow clay bricks as well as monk and nun tiles.
The truss beam joints were reinforced with steel elements to prevent movement of structural components. Additionally, special consideration was given to the structure's placement process by developing an ad hoc model in RFEM to estimate the roof's stress state during lifting.
A unique feature for this roof renovation is that the 270 m² roof was completely constructed on the ground (to ensure construction under the roof could continue during this time) then lifted and placed as a block on the existing, vertical masonry structure.
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Programs Used for Structural Analysis
Structural engineering software for finite element analysis (FEA) of planar and spatial structural systems consisting of plates, walls, shells, members (beams), solids and contact elements
Timber design according to Eurocode 5, SIA 265 and/or DIN 1052
Dynamic analysis of natural frequencies and mode shapes of member, surface, and solid models
Seismic and static load analysis using the multi-modal response spectrum analysis