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[quote user="ChuckCobleigh"]Yet the interesting thing to me is that when the full mechanical track equipment is in use, the cut spike is the easiest to deal with going in and coming out, or so it would seem. Looking at some tie replacement videos sure leads to that conclusion.[/quote] What you see as advantage in maintenance I see as shortcoming in operation. Over the time spikes can be worked out of the tie by train movement. I've seen many spikes having no contact with rip plate or rail. The difficulties with lag screw in the USA astonish me. As said before the above linked Oberbau K is over 90 years old. After WWII it was adjusted to higher loads, higher speeds and higher dynamic forces as Oberbau KS: <a href="http://www.holzschwellenoberbau.de/files/layout/fotos/image001.png">http://www.holzschwellenoberbau.de/files/layout/fotos/image001.png</a> It is still used in Europe mostly with elastomer rail pad up to 155 mph and 33 tons. <a href="https://www.vossloh.com/01_product_finder/VFS/System-KS-24/Vos_Produktbroschuere_KS-24_EN.pdf">https://www.vossloh.com/01_product_finder/VFS/System-KS-24/Vos_Produktbroschuere_KS-24_EN.pdf</a> There is a lot of experience with this kind of rail fastener of my side of the great pond. Regards, Volker
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