| 摘要 |
A temporary trench cover comprises a number of cover elements (1) which are of prefabricated or cast metal construction. Interlink means for interengaging like cover elements on assembly comprises a male head part (35) at one end and a female slot at an opposite end. The male part (35) engages with the female slot in such a way as to allow limited controlled relative movement between adjacent cover elements on assembly in both the horizontal and vertical planes. In this way the cover elements readily follow the contour of the ground in which the trench is dug providing an even surface over the trench and, on assembly, unauthorised removal of a cover element is prevented.
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