| 摘要 |
1. An element of surface rain catch drainage channel, comprising a rain receiving concrete chute having a rectangular profile of the outer surface and a U-shaped profile of the inner surface in a transverse section, together forming in the upper part longitudinal side walls with horizontal support surfaces of t width, a metal grating resting thereon, projections are provided on one of the end surfaces of the rain-receiving chute, wherein recesses are provided on the second end surface of the rain-receiving chute, characterized in that in the upper part the side walls of the rain-receiving chute spaced from each other at a distance of 4.5-5.5 t, the side wall height comprises 2.5-3.5 t, the walls in their inner profile narrow to the bottom at 9 degree -12 degree and engaged therebetween by radius, the minimum thickness of the rain-receiving chute bottom is 0.9-1.1 t, the projections are arranged symmetrically in corners in the bottom part of the rain-receiving chute and designed in the form of triangular truncated pyramid of at least 8 mm, wherein the greater pyramid base abuts upon the end surface of the rain-receiving chute and is designed as a 45 degree right triangle, equal sides of which are 1.8-2.5 t long, two side faces of each pyramid lie in one plane correspondingly to the side outer surface and to the outer surface of the bottom part of the rain-receiving chute, wherein the third pyramid face is inclined to the end surface of the rain-receiving chute at 35 degree -50 degree . 2. The element of claim 1, characterized in that comprises two removable Pi-shaped metal muzzles arranged on the walls of the rain-receiving chute, the base of each muzzle contacts by its inner surface with the support horizontal surface of the corresponding side wall, and by its outer surface forms a horizontal support surface for the metal grating, and the muzzle side longitudinal sides interacting with the side walls of the rain-receiving chute are elastic and narrow to the muzzle open side, a longitudinal vertical projection is made on the outer side wall of each muzzle, the projection height not exceeding the metal grating thickness. 3. The element of claim 1, characterized in that the metal grating is comprised of two conjugated sections. 4. The element of claims 1 to 3, characterized in that the metal grating has horizontal support surfaces on its inner surface interacting with the support surface of the corresponding wall or with the muzzle horizontal support surface, wherein two longitudinal limiting protrusions are provided to interact with the corresponding inner side of the rain-receiving chute or with the muzzle inner side wall. 5. The element of claim 1, characterized in that includes a lock connecting the metal grating to the rain-receiving chute comprising, for example, a support plate with a treaded orifice arranged inside the rain-receiving chute, an elastic convex plate with an orifice arranged between the metal grating and the support plate and is capable to interact by its ends with the inner side wall surface of the rain-receiving chute, and a coupling bolt or a screw resting upon the metal grating and interacting with the support plate through the thread.
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