Colour light installation in Seville’s Carthusian monastery
HELIOS suspended on fischer anchors
The modern art of the HELIOS colour installation by the Stuttgart artist rosalie in the Gothic Carthusian monastery of Seville met the historical architecture of the 16th century from October 2008 until January 2009 – and the fischer group of companies of Waldachtal created the link between space and time.
One of the most spectacular works at the the 3rd International Biennale for Contemporary Art at the Centro de Andaluz de Arte Contemporáneo – Monasterio de la Cartuja de Santa María de Las Cuevas was that of Stuttgart artist rosalie: the “HELIOS – La nube luminosa” light sculpture. Using 24 projectors, the light is fed into thin plastic tubes. Eight different colours are available which, controlled by a sophisticated programming sequence, create a fascinating light composition.
Holding the delicate tubes in place high above ground required a virtually invisible load-bearing construction which needed to be anchored into the historical masonry walls. To solve this demanding design and engineering task, rosalie asked two professionals for help: the Memmingen-based Pfeifer Seil- und Hebetechnik GmbH and fischer. The rope ties had to be anchored in the nave of the church so that the light installation weighing 1,680 kg including the technical equipment could be suspended safely in space.
According to the structural design computations, each anchoring point had to be designed and dimensioned for a minimum load of 10 kN or 1,000 kg. To demonstrate that the required safety standards were maintained, pull-out tests were carried out. Eventually, high-grade stainless steel threaded bars with a diameter of 14 mm were fixed in the building structure with fischer injection resin. The anchoring reached the required load transfer with 10.5 kN and with an embedment depth of 120 mm.
A total of 48 anchors were ultimately surveyed and set at heights of about 6.00 metres and 8.65 metres above ground, with M16x190 A4 threaded bars used in connection with fischer’s FIS V 360 S power resin. Rings holding the rope ties were then bolted on to the masonry anchors. The cable ties, 12 in total, consist of two separate ropes with a diameter of 6 mm. Similar to a suspension bridge, both the top suspended rope and the lower rope stretching upwards are connected with seven vertical ropes of different lengths. The space between the fixing points in the walls is 2.65 metres.
The Helios light installation measures about 24 x 8 x 3.5 metres and is suspended freely in the rope construction, positioned and fixed in place with standard cable ties. The 24 grey projectors which supply the sculpture with the coloured light are also suspended in the rope structure. The actual load input of the total light installation is between 4.88 kN and 5.86 kN per anchor. Both companies involved in the project sponsored the project with work and material.