A prefabricated, modular and single anchorage galvanized steel system consisting of a three-dimensional structure capable of containing the snow so as to prevent its breaking loose and sliding dowhill. Main structural characteristics
- SUPPORT STRUCTURE for the capture and/or containment structure; consisting of a pair of open section HEA 140-type beam in a cruciform configuration being overlaid to each other and rigidly bolted together, each provided with a yielding element for the purpose of ensuring controlled deformation;
- CAPTURE AND/OR CONTAINMENT STRUCTURE, consisting of a net of rings interlinked in at least four points, with each ring having a diameter of 350 mm; individual steel wire diameter of 3.00 mm (R ≈ 1570 N/mm2) wound on itself at least seven times forming a continuous strand with an external diameter of 9.0 mm. Zinc coating on 3.00 mm diameter wires exceeding 330g/m2; the rope of perimeter panel is worked in strands, hot-dip galvanized and blocked by aluminium-alloy sleeves suitably pressed or terminating in two eye loops complete with thimble and mechanically pressed at the end of the rope, and joined by means of high-strength hot-dip galvanized shackles; backup containment net of the double-twisted type, 80x100mm mesh, with individual galvanized steel wire of 2.7mm diameter;
- LINKING STRUCTURE, consisting of a hot-dip galvanized tubular steel strut equipped with all the devices for linking it to the SUPPORT STRUCTURE and to the GROUND FOUNDATION; the four guylines of the support structure are in hot-dip galvanized multi-strand rope ending in two terminals, one of which is complete with eye loop, galvanized thimble and pressed aluminium sleeve while the second is finished on site during installation and fastened by means of “U” clamps. For the guyline-to-structure connection use is made of high-stength hot-dip galvanized shackles;
- GROUND FOUNDATION, consisting of a double rope anchoring system where the rope is provided with thimble and protective pipe in galvanized steel of suitable length and cross-section.
Design parameters(see the Swiss guidelines “Instructions for the erection of avalanche protection structures in avalanche starting zones” – Issue 2007): z: height above sea level = 3000m
µ: slope angle: 40° N: sliding factor: 2.4 “VELA-Fermaneve” models availableThe Swiss guidelines set the parameter D k as the layer snow thickness assessed in the vertical plane to the slope; Artigiana Costruzioni builds and markets the following “VELA-Fermaneve” models: - Dk = 2,50
- Dk = 3,00
- Dk = 3,50
- Dk = 4,00
ADVANTAGESThe recourse to “VELA-Fermaneve” systems to contrast the issue of snow breaking loose, ensures the following advantages: - REDUCTION OF ERECTION TIMES
- EASE OF HANDLING OF COMPONENTS
- EASE OF ASSEMBLY OF THE STRUCTURE
- QUICK GROUND ANCHOR BEDDING TIME
- PERFECT CEMENTATION OF GROUND ANCHOR
- TOTAL BLENDING INTO THE ENVIRONMENT
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Formazione ancoraggi
 TRACCIAMENTO E FORMAZIONE ANCORAGGITracciamento preventivo degli elementi sulla base delle normative vigenti , effettuato da tecnico abilitato con qualifica di esperto valanghe; successiva operazione di livellamento in quota dei filari di opere fermaneve e disbosco definitivo, se del caso, per una fascia di rispetto utile al posizionamento delle strutture. Esecuzione delle perforazioni, introduzione degli ancoraggi e successivo getto di idonea miscela cementizia per l’inghisaggio degli stessi e la solidarizzazione al terreno.
Montaggio elementi
 MONTAGGIO DEGLI ELEMENTIMontaggio a terra degli elementi “VELA – Fermaneve” in accordo a quanto previsto nel manuale d’uso dell’opera e stoccaggio in attesa di trasporto alla definitiva destinazione.
Trasporto elementi
 TRASPORTO DEGLI ELEMENTISollevamento e trasporto in quota degli elementi fino alla sede definitiva
Fissaggio elementi
Fissaggio elementi Vela
 FISSAGGIO DEGLI ELEMENTIFissaggio degli elementi VELA agli ancoraggi preventivamente realizzati; movimentazione delle strutture fino alla configurazione definitiva.
Photo Gallery elemento “VELA-fermaneve"
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Compliance with standards
All materials used in the construction of VELA - Fermaneve systems are in accordance with the provisions of the ruling national and international standards
Maintenance schedule
Artigiana Costruzioni’s design department, thanks to its valuable experience gained through many years of operating in the field of soil protection, has drawn up a management plan called “Inspection, Monitoring and Maintenance Plan”. The Plan is to assess the working order, the condition of the work and to draw up suitable intervention schedules.
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