Roof Renovation for "Locanda alla Posta" in Venice, Italy
In 2017 Scaldaferro, a Torrone manufacturer in Dolo (Venice) and owner of the historic building "Locanda alla Posta", contracted Ri-Legno S.r.l., a leading company in timber reconstruction, to deal with the building's 55.7 ft x 52.4 ft 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 RFEM structural analysis software 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 took into account the existing construction scheme: Piedmontese timber roof trusses (orditura alla piemontese) and Italian roof trusses (capriata all'italiana). The roof trusses have a span of approximately 55.7 ft 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 the 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 of this roof renovation is that the 2,906.2 ft² roof was completely constructed on the ground (to ensure that 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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In this article, the adequacy of a 2x4 dimension lumber subject to combined bi-axial bending and axial compression is verified using RF-/TIMBER AWC add-on module. The beam-column properties and loading are based on example E1.8 of AWC Structural Wood Design Examples 2015/2018.
10-Story Office Building Made of Timber and Concrete | Palazzo Meridia, Nice, France | Architecture-Studio, France | www.architecture-studio.fr
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Programs Used for Structural Analysis
Module Extension for STEEL EC3 and RF-STEEL AISC
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