Grating material for trench covers

Abstract

This article is intended to be used as a structural material for drainage ditch covers installed in road gutters and the like. A drainage ditch cover can be constructed using multiple of these articles arranged in parallel and multiple connecting pipes that pass through these articles. In such a drainage ditch cover, the connecting pipes inserted through the through-holes on the sides of the articles can be compressed and deformed to fix them in place.

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