Prefabricated installation*) units for residential and multi-story buildingsPorschitz, Hans R.1, Schwarz, Bernhard21. PROJECTPrefabricated houses offer very good conditions for construction efficiency due to their high degree of prefabrication. Themargin for decreasing costs, however, is not yet fully utilized. Considerable potentials for cost savings is in the field ofinstallations. The project ‘Installationskern’ marked the first step to explore installation savings in prefabricatedconstruction of residential homes (one-family houses). Due to the higher requirements in terms of fire resistance andnoise reduction a second project was established to adapt installation units for the use in multi-story buildings.Both projects included the intensive co-operation between the Fachhochschule Rosenheim (University of appliedscience), house manufacturers and the installation supplying industries. Main subject of the second project for examplewere three apartment buildings in wood construction in Flensburg, in the north of Germany. They were built by‘Regnauer Fertigbau GmbH & CO KG’, a manufacturer for prefabricated buildings.The aim of the projects was to develop concepts and systems for prefabricated installation units in prefabricated houses todecrease costs and help avoid mistakes in the co-ordination of the trades. Next to the documentation about planning andinstallation, the practicability for the concepts was examined.project 1: building-high installation units for one-family-houses (fig. 1) [1]project 2: story-high installation units for an apartment building in Flensburg, Germany (fig. 2) [2]2. REQUIREMENTSThe integration of installations into buildings has to follow the severe German building regulations. There are strictdemands in...
