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19/07/2021  /  Martina Strazzer
news

Mast installations in mountain regions.

Impressive and exciting, but also time-consuming.

We have wonderful mountain regions in Switzerland, which beckon holiday-makers to go hiking and skiing. The mobile phone is our daily companion in all our activities. Mountain railways are in operation and restaurants cater for their guests. Network reception is guaranteed by mobile communications antennas. The masts for the antennas are sometimes flown in by helicopter. A time-consuming but very exciting task, which is coordinated by our WIRELESS team.

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Most important criteria: Well-coordinated team, good planning, flexibility and good weather


Nous avons demandé à Daniel Müller, technicien téléphonie mobile, directeur des travaux et chef de projet chez cablex, quels étaient les plus grands défis de l’installation d’un pylône avec l’aide d’un hélicoptère :

« La météo est l’un des plus grands défis lors des interventions en région montagneuse. Après une longue phase de planification impliquant tous les participants au projet, il faut décider très spontanément si l’intervention est finalement possible ou non. En montagne, le temps peut changer très vite. Il est utile de prévoir quelques jours tampons afin de pouvoir réagir à d’éventuelles perturbations. »

Quel genre de planification faut-il pour une installation de pylône et d’antenne aussi spectaculaire ?

« Cela varie d’un site à l’autre. Le principe général est de bien tout examiner, documenter et discuter au préalable. Il est essentiel de discuter sur place de l’exécution détaillée avec une entreprise de construction métallique expérimentée qui assure l’héliportage du pylône. Le lieu de chargement approprié est défini avec l’entreprise d’hélicoptères et il faut obtenir les éventuelles autorisations nécessaires.

Et, bien sûr, la coordination avec l’équipe de montage est extrêmement importante pour s’assurer que tous les gestes soient maîtrisés pendant les quelques minutes que dure l’installation du pylône. Chacun doit connaître ses tâches et les accomplir. Car il est impossible de répéter une telle opération. »

To Dos of those involved in the project.

cablex plans and coordinates the project and performs the task of construction management on site. The metal worker is responsible for installing all steel parts such as platform, mast and anchor points. The mast is flown in by the respective helicopter company. The special feature of a helicopter is that it has two rotors, one above the other, and can thus fly heavier loads. How much weight can be carried strongly depends on the altitude at which it is flown. For this reason, the mast usually needs to be flown into mountain regions in two parts.

At the actual installation of the two mast parts, the flight assistant from the helicopter company and two fitters from the metalworking company are on the mast. The subsequent installation of the antennas, radio units and high-frequency cables is performed by the cablex team. Regional electrical companies provide support for electrical connections and fibre optic connections as well as fibre optic cables.

Further facts about the project:

Client for cablex:                           Swisscom

Preparation time:                          3 to 6 months

Approval of mast construction:   The procedure goes through the respective municipality/canton

Weight of mast:                             1st mast section approx. 850 kg, 2nd mast section approx. 430 kg

Antenna installation:                     3G and 4G antenna, 5G prepared for future commissioning

Here in Switzerland, the helicopter is used as a means of transport for cell towers in rough terrains or mountain regions, whenever traditional transport routes are not possible. Daniel Müller tells us that he has between five and ten assignments each year in his area. 

We thank Daniel for the brief glimpse into his impressive area of activity and wish all colleagues continued success in their fascinating projects. Of course, when working on the mast and in impassable regions it is always important to remember: SAFETY FIRST!

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cablex AG | Tannackerstrasse 7 | 3073 Gümligen | Phone 0848 222 539 | cablex.info@cablex.ch