This structure allows the rock mass support inside a mine; as part of the support necessary to prevent collapsing. This consists of two columns and a semicircular arc; formed by beams H.
Drawing labels, details, and other text information extracted from the CAD file (Translated from Spanish):
technical specifications for, approved, scale, support for sleeve, focus, taco, wood, board, water, pipe, cemented, air, up to the top level of the sleeper, revised, CAD drawing, layout, title, line trolley, accessories , ventilation, manga, supports, alcayata, electric, cable, date, file, acad, mine morococha, mining company argentum and minera natividad