Philipp Group

New Power Duo approval for cable loop system

Cable loops, individual and rail-mounted, have been recognized by the precast industry as an established means for uncomplicated connection of walls and colunmns for many years and are suitable for creating structural connections or for transmitting static forces. Philipp, as one of the leading manufacturers of such systems, has now extended its Power Duo Rail more customer-oriented.

Until now, only a combination of mortar and rail for effectively connecting two concrete elements was possible. With the new approval, Philipp has now added Grace Bauprodukte GmbH, Essen, Germany, as a second mortar supplier. This opens up more possibilities for construction contractors for using a suitable or preferred mortar. No matter whether P&T or Grace are chosen as possible mortar suppliers, a liquid grouting mortar and a thixotropic mortar is in each case available.

Increasing the design forces

In this connection, higher design forces for shear forces running parallel to the joint could be achieved with the Betec mortars from Grace. Here, the 90 kN/m attained with the grouting mortar and the 70 kN/m attained with the thixotropic mortar set new standards, resulting in an increase of 10 % and 30 %, respectively.

For use of the Power Duo Rail, the direction of installation is predefined and clearly marked in order to achieve optimal load transfer. Where this requirement was nonetheless ignored, a structural analyses used to be difficult to provide. With the new approval, checked, practice-oriented design forces are now available that enable error- tolerant installation.

Maximum faulty position can be calculated

Where vertical lappings of the cable loops do not meet the requirements of the approval (≤ 3 cm), this could previously not be shown in the design calculation. With the new approval, the maximum faulty position of 12.5 cm (half the distance of the cable loops) has now been verified and filed. The safety level achieved is nearly the same as that of correctly installed reference products, although the design values are lower by around 30 % compared to the normal values.

These new extensions make the Power Duo System much more transparent and thus easier to master and calculate for planners/certified structural engineers. A revised version of the online design aid is available on the Philipp Website as support. Only a few entries are required for quick calculation and verifiable results.

Related articles:

A new kind of cable loop connection system with DIBt approval

Precast construction is related to efficient manufacturing of precast concrete components and short construction periods. Therefore, also the connection of the elements among each other has to be...

Issue 2020-02 PHILIPP GRUPPE

Simple design and more power for rope loop connections

The company Philipp has recently expanded its Power Series of approved products for connecting precast reinforced-concrete elements with flexible rope loops by introducing two connection rails at the...

Issue 2019-01 PHILIPP GRUPPE

New connecting rail

The new and approved Philipp Power One connection system is the consequent further development of and supplement to the Power Duo system that has been successful for more than a decade now. It is...

Issue 2016-08 Philipp

Power Duo connection rail approved for fire walls

The Power Duo System – successfully used for more than ten years as a simple means for connecting precast reinforced-concrete elements with flexible steel-wire rope loops – has now been approved as...

Issue 2012-03

Economical connection of precast components

The methods used for sealing the joints between precast components used are to this day often outdated, although (demonstrably) more economical technologies for every-day use are available for a long...