High walkways, Low walkways, Platforms... on Tank cars

Richard Brennan <brennan8@...>


Browsing through Kaminski's AC&F Centennial History book; the last ACF tank car builder's photo I see with high walkways is circa-1915, and the first with a modern (or should that be moderne?) tank-top operating platform is dated 1934 .

What occasioned these changes.. and why was there such a long transition period to the now universal top platform design? It appears that cars without platforms were built well into the late 1950s... Was it simply buyer preference... or was there a change in AAR or DOT regulations?

Richard Brennan - San Leandro, CA

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