Fuksis were dipped and became teekkaris with tolerance tested cages!

In Teekkari dipping, each year hundreds of fuksis are turned to teekkaris. Without doubt, the Tampere way of performing this procedure is the most magnificent one in Finland. In the core of the event are two dipping cages. These cages are being dipped hundreds of times during the day with the help of mobile cranes. 

Teekkari dipping has been around for several decades. In one go, a maximum of 10 fuksis are being dipped with one cage. The cage is being dipped approximately 3-6 times, on average 4,5 times per group. Each year around 930 students visit the warm waters of Tammerkoski. Add a few non-fuksis, who also get to go to the rapids, is the amount of people dipped roughly 1000. With this information, the total dipping amount of the cages can be calculated.

At least 100 groups are dipped 4,5 times. Altogether 450 dips are made, or 225 dips per crane. In a lifespan of a dipping cage, this means approximately a great deal of dippings. That’s why maintaining the cages is very important to ensure a safe Teekkari dipping. This year, the floors of the cages were renewed, after which they were ready to be tolerance tested!

Tolerance test were run and sponsored by concrete- and bridge structure research team in civil engineering laboratory. The research team kindly transported the cages to laboratory from their storage. The cages were inspected visually and the team determined how to run the tests. Customer, in this case Tampereen Teekkarit, determined the level of stress to test with. In the tolerance test, cages were hanged from a garage lift, and test load was directed to the floor of the cage with pull rods. Effective load was determined as 10 persons weight, 80kg per person. Additionally, a 40kg secondary load was added per person, and the sum was multiplied with a backup multiplier of two (2). This resulted in a test load of whopping 2400kg. As expected, the cages endured this load without difficulties.

We also got an interesting report about the tolerance tests. From those we got to know that the peak of load directed to the floor of a cage was 24,8kN, meaning roughly 2500kg of load. All the deformations observed in the cages during the tests were almost fully restored. Lasting deformations were estimated to be because of the brand-new wooden floor, which settled in during the tests. Many thanks to concrete- and bridge structure research team for testing the cages! Fuksis became teekkaris safely again! More information about the activities of the research group and the tolerance test laboratory can be read from their web page.