| 摘要 |
FIELD: road building; barriers of bridges and overhead roads. ^ SUBSTANCE: proposed guard railing contains posts with longitudinal beams secured on posts by means of cantilevers. Novelty is that each post rests on apron of height H made of sheet steel, thickness S, and provided with vertical and horizontal members of different areas and with inclined widening downwards trapezoidal member in between, whose side edges of width (1.7-1.8)S are bent inwards the railing through 45°. Hole is made on vertical member for fastening to post. Holes on horizontal member are designed for anchor bolts. Angle of inclination of trapezoidal member to horizontal is 60° at its length being (o.64-0.67)H. Intermediate vertical member of width equal to width of horizontal member and with height within (0.110-0.125)H is made between trapezoidal member and horizontal members. Ratio of widths of vertical and horizontal members is 0.30-0.34. Apron can be provided with second inclined and second vertical members arranged symmetrically relative to vertical axis of post relative to other inclined and vertical members. ^ EFFECT: improved reliability of guard railing and increased service life. ^ 2 cl, 2 dwg |
