HETEROARYLETHYLAMINES,PROCESSES FOR THE PREPARATION THEREOF,AND THE USE THEREOF AS PRODUCTION PROMOTORS IN LIVESTOCK

摘要

The invention proposes a load-bearing floor structure having a multiplicity of struts (16) which are connected to one another at junctions and form at least two three-dimensional grid layers (10, 11) which are connected to one another by such struts (16). Said layers comprise a network-type three-dimensional grid, whose meshes are each formed by a three-dimensional-grid structure arranged around an opening. The three-dimensional-grid layers (10, 11) are connected to one another by connecting parts (12) which themselves form a three-dimensional grid. This load-bearing floor structure permits the construction of load-bearing floors of a greater effective span than conventional load-bearing floors, the overall installation being rendered less expensive and mounting being simplified with a lower weight and shorter, lighter struts.