It shows the level of ribs as well as cuts and elevations
Drawing labels, details, and other text information extracted from the CAD file (Translated from Spanish):
cross-section, longitudinal cut, reticular slab design, column, even strands, corner detail, block v.n., corner detail, odd yarns, details, dimension:, scale:, teacher:, key:, date:, draft:, tit. of the plane:, draft:, General notes, Specifications, matter:, notes, location:, north:, ground