Anchorless fastening channel – redesigned and verified

Figure: PohlCon

Fig. 1: Profiled metal sheet façade fastened in a JTB-uni lightweight channel with anchors [PCN1998]

Figure: PohlCon

Fig. 2: Cross-section of the anchorless JTB-LA
fastening channel (left) and secure anchorage due
to lateral die cuts (right)

Figure: PohlCon

Fig. 3: Concrete failure cone of an undercut
anchor [ELI1994] (left) and an anchorless JTB-
LA channel (right)

Figure: PohlCon

Fig. 4: Simulation model in half-section, anchorless channel with load above the die cut (left), and conventional anchorage (right)

Figure: PohlCon

Fig. 5: Development of the concrete failure cone under tensile stress in the anchorless JTB-LA
channel (left) and the JTB-uni channel (right)

Figure: PohlCon

Fig. 6: Comparison of loading above the web (left), die cut (center), and corresponding failure pattern (right)

Figure: PohlCon

Fig. 7: Load direction normal (z), transverse (y) and longitudinal (x) to the axis of the channel and associated resistance values with concrete failure

Figure: PohlCon

Fig. 8: Safety between approved values and tests with relevant steel failure of screw and back of channel along the loading axes, using as an example the smallest channel, JTB-LA-60x2-L150

Figure: PohlCon

Prof. Dr.-Ing. Mazen Ayoubi
Professor of Building Materials Science at Frankfurt University of Applied Sciences, Nibelungenplatz 1, 60318 Frankfurt am Main;

M. Sc. Ing. Sacha Sobotta
Research engineer at PohlCon GmbH, Nobelstraße 51, 12057 Berlin;

Figure: PohlCon

Fig. 4: Simulation model in half-section, anchorless channel with load above the die cut (left), and conventional anchorage (right)

Figure: PohlCon

With increasing load requirements and, at the same time, significantly reduced installation space, products for load application must be developed which meet the requirements without the need for deep anchoring. The recently approved anchorless JTB-LA fastening channel from Pohlcon allows loads to be applied to much more slender precast concrete elements.

With increasing load requirements and, at the same time, significantly reduced installation space, products for load application must be developed which meet the requirements without the need for deep anchoring. In addition, material and resource savings are increasingly becoming a must in requirements specifications along with typical parameters such as the transferable forces. The recently approved anchorless JTB-LA fastening channel from Pohlcon allows loads to be applied to much more slender precast concrete elements, thus minimizing the design effort and increasing creative freedom.

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