| 摘要 |
The present invention relates to a heavy load grating installed as a cover of a drainage path crossing a vehicle entry, capable of simultaneously satisfying smooth drainage and passage of a vehicle, easily enduring a load of the vehicle passing by at any time, remarkably reducing noise generated when the vehicle passes over and preventing overspeed of the vehicle. A heavy load grating according to an embodiment of the present invention comprises: a metal mount frame mounted on an upper edge of a drainage path; a noise prevention rubber mounted on both sides of an upper part of the mount frame and having a cutting groove with a specific depth from an inner surface; and a grating having a body comprising a plurality of drainage holes, a wing unit integrated with the both sides of the body to be inserted into and coupled with the cutting groove, vertical and horizontal frame units integrated with a bottom surface of the body, wherein the body comprises an arch-shaped overspeed prevention curvature unit which upwardly protrudes toward the center from the both sides thereof. |
