A sensor system for monitoring hall roofs - TZÜ®

  • The balance is tragic, the prognosis worrying: Hall roofs pose a serious and still underestimated risk. The tragedy of Bad Reichenhall, the ice rink that was a death trap for 15 people, is not an isolated case. The disastrous series of hall roof collapses continues to this day. The real trigger for the collapse of a roof is usually environmental influence - design flaws, construction defects, material weakness and lack of maintenance further complicates the situation. Possible causes include compressed snow, clogged rain drains, frozen drain pipes, etc.. This can cause a static overload that can overwhelm even the most stable hall roof. The failure probability is high. He who plans ahead acts now. With the proven preventive concept: the innovative TZÜ® Sensor System from Richard Jahre GmbH.
  • Where as targeted visual inspection was the rule up to now, for the first time the Richard Jahre early warning system provides a permanent status check of hall roofs. With the development of this unique solution and its totally new approach, the engineers from Richard Jahre have made a breakthrough in terms of structural stability. The patented "Made in Germany" global innovation is a TZÜ® Sensor System (girder status monitoring), that continuously and independently monitors the deformation of roofs made from wood, steel, prestressed and reinforced concrete. The sensitive sensor system converts mechanical stress into electrical signals and immediately raises an alert when critical measured values are reached e.g. due to weather conditions or material weakness. Risk warnings are reported visually and acoustically as well as transmitted electronically (e-mail, SMS). The hall display unit was developed in collaboration with Siemens AG. Action can be immediately taken in cases of overloading.
  • The installation of the TZÜ® Sensor System provides a decisive contribution to hall quality assurance which the authorities as well as the public urgently demand. Even in times of scarce resources, hall operators bear the full responsibility for the safety of visitors as well as for the value retention of the building.With the tried and tested Richard Jahre GmbH early warning system it is now possible to monitor the risk of a hall roof collapse within a manageable budget. This entirely new one-of-a kind technological approach ensures low maintenance and reduces the overall operating costs.

There are many danger points


Inadequate maintenance, servicing and hidden construction defects can lead to overloading of the roof structure. But also:

  • 1) Clogged run-offs.
  • 2) Lack of emergency overflows.
  • 3) Snow and snow build-up.
  • 4) Unaccounted loads (e.g. solar panels).
  • 5) To much gravel.
  • 6) Corrosion and material fatigue.

The system components and its distribution in the hall

Installation examples

Installation in August 2010 in Wilhelmshaven

  • Quantity TZÜ sensors: 5
  • Installation date: 2010
  • Fixing to the cross bar: screwed connection
  • Type of cross bars: gluelam
  • Wingspan: 29 m
  • Number of cross bars: 10
  • Year of construction: 1978

Installation in September 2010 in St. Gallen

  • Quantity TZÜ sensors: 5
  • Installation date: 2010
  • Fixing to the cross bar: screwed connection
  • Type of cross bars: gluelam / framework
  • Wingspan: 24 m
  • Number of cross bars: 10
  • Year of construction: 2010

Installation in April 2011 in Oldenburg

  • Quantity TZÜ Sensors: 3
  • Installation date: 2011
  • Fixing to the cross bar: Bonding
  • Type of cross bars: Prestressed concrete
  • Wingspan: 29,4 m
  • Number of cross bars: 7
  • Year of construction: 2011

Information about our TZÜ-System / Static monitoring