Petra slab hanger

Trimmer beam for hollow-core slabs

Fig. 1 Slab hanger for hollow-core slabs.

Fig. 2 Typical shapes of Petra hanger:a) symmetric hanger.

Fig. 2b) Non-symmetric hanger.

Fig. 2c) Hanger with straight plate.

Fig. 3 Cross-section of the front plate.

Fig. 4 Typical layout of a hollow-core floor with Petra hanger.
Abb. 4 Typischer Aufbau einer Hohlraumdecke mit Petra-Auflagerbalken.

Fig. 5 Load distribution during construction stage. Abb. 5 Lastverteilung während der Bauphase.

Fig. 6 State of stress in the front plate of Petra hanger.Abb. 6 Belastungszustand der Stirnplatte des Petra-Auflagerbalkens.

Fig. 7 Load distribution during normal use situation.
Abb. 7 Lastverteilung im normalen Gebrauch.

Fig. 8 Reinforced concrete mechanism during fire situation.
Abb. 8 Wirkmechanismus des Stahlbetons im Brandfall.

Fig. 9 Example of load capacity curve of Petra hanger.
Abb. 9 Beispiel für die Traglastkurve eines Petra-Auflagerbalkens.

Peikko Group is one of the European leaders in providing structural connections for precast concrete elements. It has over 40 years of tradition in manufacturing and innovative R&D. Among others, Peikko Group focuses on the development of supporting systems for precast hollow-core slabs, including steel beams for slim-floor systems [1] and smaller hangers used to support slabs around floor openings. Some of these systems, which were originally developed for the Scandinavian market, are now being offered to customers across Europe.

Some of these systems, which were originally developed for the Scandinavian market, are now being offered to customers across Europe. The slab hangers for hollow-core slabs have been produced in Finland for about 15 years under the name POK. During this time, some 20,000 POK hangers have been used in hundreds of projects (Fig. 1) mainly in Scandinavian countries where they became almost a standard and replaced other types of solutions. The product became popular with designers as well as assemblers mainly because the manufacturer (Peikko Group) was able to guarantee the quality of the product...