- What are the advantages of the new design according to ETA?
- What is the meaning of the acronym ETA?
- Can the calculation of the same situation according to ETA and to the old national approval lead to different results?
- What are the changes in the profiles, anchors and spacing?
- Is there a design software for anchor channels?
- What is CEN / TS 1992-4:2009?
- Are there any changes in the installation of the anchor channels?
- How does Jordahl® Expert determine the decisive anchor?
- Is it possible, that other anchors than the decisive are higher utilised?
What are the advantages of the new design according to ETA?
The design for the new ETA, in conjunction with the CEN / TS 1992-4 offers the user the exact knowledge of the safety of fastenings (e.g. in cracked or uncracked concrete) and a various other advantages. Thus, anchor channels can be calculated with different concrete strengths in the future, used with smaller edge distances, can be designed for any load positions and reinforced with stirrups. The existing conditions can thus be considered more accurate and provide a technically and economically optimized design of anchor channels.
What is the meaning of the acronym ETA?
ETA means European Technical Approval. The European technical approval is a proof for the fitness for use of a construction product within the meaning of the Construction Products Directive; transposed in Germany by the Bauproduktengesetz (‘Construction Products Law’).The European technical approval enables the manufacturer to place the CE marking on the construction product and thus the access to the European market.
Can the calculation of the same situation according to ETA and to the old national approval lead to different results?
A design based on the new proofs and conditions for the ETA and the CEN / TS 1992-4 can in some cases lead to different results than the previous channel selection tables for the national approval. The design methods with the new method take into account various boundary conditions and represent the current state of the art.
Can the calculation of the same situation according to ETA and to the national approval lead to different results?
A design based on the new proofs and conditions for the ETA and the CEN / TS 1992-4 can in some cases lead to different results than the previous channel selection tables for the national approval. The design methods with the new method take into account various boundary conditions and represent the current state of the art.
What are the changes in the profiles, anchors and spacing?
With the introduction of the new design minor improvements were made to the products. The larger profiles get higher design resistances, the smaller anchor channels get smaller spacings. This changes will take place in early 2011. The optimized, ETA-compliant items will then have the CE mark.
Is there a design software for anchor channels?
Since the beginning of 2011 the Deutsche Kahneisen Gesellschaft offers a user-friendly software for free download. This facilitates users to switch from the previous rigid design according to tables on a flexible design according to ETA.
What is CEN / TS 1992-4:2009?
The new CEN/TS 1992-4 series is a pre-standard consisting of 5 parts which provides design methods for headed studs, anchor channels as well as post-installed mechanical and chemical fasteners for structural purposes to transmit actions into concrete and reinforced concrete structures. The CEN/TS applies to fasteners with established suitability for the specified application in concrete covered by provisions such as European Technical Approvals (ETAs). The design methods represent the actual state of the art. CEN/TS 1992-4 is valid for all applications that are within the scope of the EC 2 and will now be part of the EC 2.
Are there any changes in the installation of the anchor channels?
As anchor channels are installed in principle straightforward, the installation has remained largely unchanged. Improvements were incorporated in the applied torque moments, which can now be optimised for various applications. Those can be found in the application documents or in the ETA.
How does Jordahl® Expert determine the decisive anchor?
The utilisation is calculated for every anchor and verification along the complete sliding area. The permitted sliding area is shown in the graphic display as thin line perpendicular to the load arrows. Load distances are respected. The maximum utilisation ratio for all anchors, verifications and load positions defines the decisive anchor and the critical load position.
Is it possible, that anchors other than the decisive ones are utilized to a higher degree?
Yes. E.g., if an interaction verification determines the decisive anchor, other anchors may be utilised to a higher degree by shear load while values for tension load are much smaller.
