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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When designing many members in one design case, it is sometimes difficult to recognize the governing designs. To improve the overview and to display the relevant designs in a compact way, you can use the filter options under the result tables. These are included in all design modules of steel, aluminum and timber structures in RFEM and RSTAB.
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The cross-section resistance design analyzes tension and compression along the grain, bending, bending and tension/compression as well as the strength in shear due to shear force.
The design of structural components at risk of buckling or lateral-torsional buckling is performed according to the Equivalent Member Method and considers the systematic axial compression, bending with and without compressive force as well as bending and tension. Deflection of inner spans and cantilevers is compared to the maximal allowable deflection.
Separate design cases allow for a flexible and stability analysis of members, sets of members, and loads.
Design-relevant parameters such as the stability analysis type, member slendernesses, and limit deflections can be freely adjusted.
- I have defined temperature loads, strain loads, or a precamber. As soon as I modify stiffnesses, the deformations are no longer plausible.
- Can the properties, such as B. the cross -section or the surface thickness as well as the material of a surface of an existing element for a new element?
- In RF-/TIMBER AWC and RF-/TIMBER CSA, I receive the error that says torsion limit exceeded. How do I bypass this error message?
- Can I consider a reduction of the stiffness according to the German regulation NCI NA.5.9 in TIMBER Pro?
- Why is the strength always reduced by the kmod value of 0.6 during the calculation in the RF‑LAMINATE add‑on module, although I have load combinations with variable loads?
- I have selected all available members for design in RF-/TIMBER Pro. Why are tapered members not designed?
- When performing the fire resistance design with TIMBER Pro, I get the error 10001. How can I fix the error?
- Is it possible to set user-defined values when viewing solid stress results?
- How can I create a curved or arched section?
- How are the signs for the release results of a line release and line hinges interpreted?
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