The self-bearing composite steel truss and concrete NPS® CLS Beam offers integrated fire resistance in conformity to Eurocode 2-2. It is ideal for fire-resistant structures with large overloads and/or spans; it is particularly suited to coupling with hollow core slab or slab ceilings.
The metal structure, made of structural steel (UNI EN 10025-2), with EN 1090-1 CE marking, is made of one or more trusses welded using metal active gas welding (Process UNI EN ISO 4063-135).
The lower chords are inserted in a class C28/35 concrete footing (UNI EN 206-1:2006), precast and equipped with reinforcement and surface reinforcement sized to support the load of the heavy ceilings on NPS® Cls Beam.
| Metal structure | Made of structural steel in conformity with UNI Standard UNI EN ISO 10025-2 |
| Footing | C28/35 or higher class concrete (UNI EN 206-1:2006) designed and equipped with reinforcement and surface reinforcement. Acts as a ceiling support and formwork for the casting formwork |
| Casting framework | C25/30 when not otherwise noted by the designer |
| Self-supporting | Yes. NPS® Cls Beam bears itself and the ceiling that rests on it, already from the moment it is placed on the column (1st phase), already before the formwork cast (2nd phase) |
| Welding | Using metal active gas welding (Process UNI EN ISO 4063-135) |
| Mechanical resistance to fire ( R ) | Up to 240 minutes |
| Standards referenced | In the 1st phase Eurocode 3 In the 2nd phase Eurocode 4 For anti-seismic Eurocode 8 |
| Design | Elaborated with the System calculation procedure conforming to the current Standard, and signed by a qualified technician. |
| Countable length | Distance between theoretic supports used in the calculation |
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Eng. Alessandro Fedrigo,
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CLS beams are connectable with all types of columns, and adapt to different support shapes in use. It is ideal for realising decks with jumps in height, thanks to the footing that can be shaped with different heights on two sides. |
