Improvements in the grooved, flanged profiles, in particular for the shoring of mines, in which the ribs that are narrowed from the bottom towards the wings describe an opening angle of less than about 45º, for example for the shoring with sliding arches, wherein the grooved profiles fitted one inside the other in the same direction are fastened together in the area of overlap and rest one on top of the other by means of the wings dimensioned with greater thickness above the bottoms, characterized in that internal and external side of the profile, the nerves have lines of limitation in curve form and the bottom is limited on the inside by a curved line of continuous transition to the nerves, while the outer side of the bottom is, in essence, flattened in rectilinear form, and because the ratio between the thickness of the bottom and the width of the flattening is at least about 0.2. (Machine-translation by Google Translate, not legally binding)
展开▼
