At another place along the same backdrop behind Hammil Yard as Alden Corrugated, a similar gap for a road exists between two buildings. It's dark enough that you can't really see anything in there. A pipe bridge was scratch built out of Plastruct trusses and styrene to cover up the plywood edge. The supports are leftover tops from the Walthers conveyor supports. And the large "insulated pipe" is a piece of styrene wrapped with very narrow masking tape, the ends Cyanopoxied to prevent unraveling.