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Screw dowels (trenails) on the Santa Fe

This article is about trenails, also called screw dowels. These are described in the 1904 Proceedings of the American Railway Engineering & Maintenance-of-Way Association:

"Attention has been called to a method developed abroad, whereby the wear under the rail or at the spike in a soft wood tie can be materially decreased. This consists of the insertion of a hardwood trenail, so-called, being a wood screw of two or three inches diameter, having a spike hole bored in the center. This trenail is screwed into a hole tapped in the tie, and a spike driven or screwed into it..."

Site URL: http://pages.uindy.edu/~oaks/Articles/trenails/Trenails.htm
Date resource added: 29-Jan-2001
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