| 摘要 |
The invention relates to a gully grating and comprises a grating 14 and a frame 12. A top surface 26 of the frame 12 defines two notional planes (44, 46 figure 2, preferably in a V formation. The grating 14 includes at least one barrier bar (70 figure 2) and a rib (77 figure 2) comprising an elongate raised portion (79 figure 2) which extends in the direction of the length of the barrier bar (70 figure 2) and protrudes above the notional plane (44, 46 figure 2) defined by the portions of the frame 12 which the longitudinal axis of the barrier bar (70 figure 2) extends through such that when water flows in a direction perpendicular to the barrier bar (70 figure 2), the raised portion (70 figure 2) causes deflection of water so that an increased amount of water flows clown through the grating 14 directly before the rib (77 figure 2) in relation to the direction of water flow. Dropped bars (72 figure 4) may also be provided in a later embodiment. |
