Geberit Group


  • Geberit Group

How strong ist a toilet?

Find out how much weight a wall-hung WC has to be able to bear according to EU rules and regulations by placing the different animals on the toilet.

Solid as a rock

Wall-hung WC and bidet ce­ramic ap­pli­ances have to be de­signed so that they can with­stand loads of up to 400 kilo­grammes. This is a Eu­ro­pean stan­dard spec­i­fi­ca­tion. As a mat­ter of con­sis­tency, Geberit also de­signs the in­stal­la­tion el­e­ments for dry­wall or solid con­struc­tion to be able to cope with such a load. “When a toi­let in front of a dry­wall is ex­posed to max­i­mum loaded, the load-bear­ing in­stal­la­tion el­e­ment is only per­mit­ted to de­form slightly,” ex­plains Oliver Wolff, Head of Build­ing Physics at Geberit In­ter­na­tional. “If the de­gree of de­for­ma­tion ex­ceeds our de­fined limit val­ues, cracks can ap­pear in the wall tiles or other dam­age can occur, which we of course want to avoid at all costs.”

Realistic load test

The Geberit installation elements for wall-hung WCs and bidets are statically designed to be able to bear a load of up to 400 kilogrammes. The maximum load for washbasins and urinals is 150 kilogrammes, and 100 kilogrammes for support handles. For the statics tests in the building technology and acoustics laboratory, the installation elements are built in exactly as they would be at a normal building site. The only difference to real construction situations is that a steel support frame for the test weights – and not a washbasin or WC ceramic appliance – is screwed into the installation elements. This is mainly done for safety reasons.

Narrow tolerances

To be able to precisely measure drops and deformations, the installation elements are equipped with measuring rods at specifically defined points. Laser crosshairs provide the relevant reference points. The drop at the front end of the support frame and the deformation of the installation element are measured before, during and after the test. If they exceed the narrow tolerances defined by Geberit, the design of the installation element has to be revised and improved.

Testing galore

As a provider of comprehensive installation systems for drywall and solid construction, Geberit possesses extensive know-how in structural analysis. In a building technology and acoustics laboratory that is indeed unique in Europe, Geberit’s experienced building physicists carry out several hundred statics tests each year. Thanks to these tests, the product developers can access an extensive database with the results of over 2,500 statics tests. They are also supported in their work by experts who carry out complex statics calculations using powerful simulation programmes.