In the structural drawing of railings of separated overpass, the material list of the drawing is: steel plate, round steel, welded steel pipe, pea gravel concrete, C30 concrete, N7 reinforcement, etc; The design contents include: block A of railing base, block B of railing base, block C of railing base; The height of railing block ABC is 1.32m; The standard section width of railing block A is 2m; Railing block