Freight car roof construction

[Lee Gustafson]

There was an article on early narrow gauge freight car roof construction written by I believe Randy Hees. Does anyone have a source and recommendations I where I can find that article? Thank you in advance.

Lee Gustafson

[Chris Walker]

 https://www.pacificng.com/pdf/web/viewer.html?file=/ref/freighttech/TheRoofProblem_By_Randy_Hees.pdf

[Lee Gustafson]

Chris,

Thank you very much. That is the article. 👍

Lee Gustafson