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.
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.
Slab matches
NPS® Cls Beam - hollow core slab
NPS® Cls Beam - slab made of EPS
NPS® Cls Beam - cellular reinforced concrete
NPS® Cls Beam - predalles slab
Support beam on column
Support beam on column
Structural continuity
Structural continuity
Customising
NPS® Cls Beam joints using anchor bolts
NPS® Cls Beam with bore holes
NPS® Cls Beam joints using Halfen
Graphic preliminary design
Graphic preliminary design
Assembly
APPLICATION-TECHNIQUE RECOMMENDATIONS
Eng. Alessandro Fedrigo, NPS® Designer
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.