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Philadelphia Style/Paoli line 1910s
Bryn Mawr station
Philadelphia catenary expansion 1920s
North Philly lattice structures circa 1920s
Brill steel tubes
Lamokin steel tubes 1920s
Marcus hook lattice 1920s - 80s? Utility overbuild
Claymont DE steel tubes & wire spans
Beyond Philadephia 1930s Riveted catenary
poles and K braced (Portal) structures
The K braced catenary poles started to appear when riveted H beam sections were made
available. They start on the main line beyond at North Philadelphia and on the main line
beyond Paoli
Frankford Junction
Large K braced Structure Union NJ