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Structures include, but are not limited to:
underbridges and subways of enclosed length less than 150m
culverts greater than 0.9m in diameter
structural maintenance of high fences, walls, screens and environmental barriers
lighting columns or catenaries and
There will also be non-structural elements such as:
cross carriageway ducts
ducts through structures
technology equipment cabinets and
all ancillary equipment...