NPS® Cls Plus Beam

The NPS® Cls Plus Beam with prestressed concrete footing with mixed steel-concrete structure is fire-resistant according to Eurocode 2-2 requirements. Recommended for fire-proof structures with large overloads and/or spans, particularly resistant to chemical-physical aggressive agents.

It differs from NPS® Cls Beam due to the presence of precompressed reinforcements, strands or cables, on the concrete footing.
Precompression guarantees the self-supporting aspect of the base slab, and contributes to the overall capacity of the beam, allowing truss size to be reduced, while deflecting to the beam itself.
Lower chords are inserted in precast class C32/40 concrete footing (UNI EN 206-1:2006), and equipped with reinforcement and surface reinforcement sized to support the heavy load of the ceiling on the NPS® Cls Plus Beam.

Product Details

Technical data

Metal structure Made of structural steel in conformity with UNI Standard UNI EN ISO 10025-2
Footing C32/40 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 Plus 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) according to NTC 2008 in force
Mechanical resistance to fire ( R ) Up to 240 minutes
Standards referenced In the 1st phase § 4.2 NTC 2008 and Eurocode 3 In the 2nd phase § 4.3 NTC 2008 and Eurocode 4 For anti-seismic § 7.6 NTC 2008 and 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

Slab matches

NPS® Cls Plus Beam - hollow core slab NPS® Cls Plus Beam - hollow core slab

Support beam on column

Support beam on column Support beam on column

Structural continuity

Structural continuity Structural continuity

Customising

NPS® Cls Plus Beam joints using anchor bolts NPS® Cls Plus Beam joints using anchor bolts
NPS® Cls Plus Beam joints using Halfen NPS® Cls Plus Beam joints using Halfen
NPS® Cls Plus Beam with bore holes NPS® Cls Plus Beam with bore holes

Graphic preliminary design

Graphic preliminary design Graphic preliminary design

Assembly

CONSIGLIO TECNICO-APPLICATIVO

China Eng. Stefano China,
Technical Director

com@tecnostrutture.eu  

The use of the precompression technique makes NPS® Cls Plus Beam the ideal solution to adopt for thin structures with medium or large span (starting from 10 m), and in environments defined as "aggressive" or "very aggressive".

 

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