Rheinwelle – a modern sports and leisure swimming bath
Name of the client/building owner
Zweckverband Regionalbad Bingen - Ingelheim
Function of building
Degree of enclosure
Fully enclosed structure
Temperate - cold winters and mild summers
Number of layers
Type of application of the membrane
The so-called "Rheinwelle" owes its name not least to the shape of its building: it undulates through the Rhine-Hessian orchards. Seen in plan view, it resembles the course of a river. And it was the countryside by the river Rhine that inspired the planners of the architectural office of Dr. Krieger when they designed the new building.
The three different swimming bath areas (sports, adventure and sauna area) were roofed by a transparent roof made of ETFE cushions which open the view towards the Rhine-Hessian skies and provide for optimum light conditions inside the swimming bath premises.
Since the roof should also re-create the requested wave form, it was a particular challenge for the art of engineering. A steel substructure with honeycomb girders forms the base structure for the five ETFE-cushions which span the swimming bath over a length of approximately 110m in the longitudinal axis.
Each of the air-supported cushions is made of three layers of ETFE film which are clamped by aluminium clamping strips at the edges. The big cushions, with sizes ranging from 5m x 16m to 13m x 30m, are segmented by parallel arches and suction cables stretched over them. Due to the cut, the top film warps upward in a big arch between the suction cables which leads to an attractive visual effect and at the same time provides for a continuous water and snow discharge.
Description of the environmental conditions
Material of the cover
Main dimensions and form
Covered surface (m2)
Total length (m)
Total width (m)
Form single element
Duration of use
Temporary or permanent structure
Dr. Krieger Architekten + Ingenieure GmbH & Co. KG
form TL ingenieure für tragwerk und leichtbau gmbh
Ceno Membrane Technology GmbH
Marijke M. Mollaert