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PostPosted: Mon Sep 21, 2009 11:29 pm 
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Joined: Mon Sep 21, 2009 1:32 pm
Posts: 2
Are the ties required for switches? As my staging yard will require about 20 switches I was wondering are the wooden ties required, as I think PCB ties will provide the strength. Am I correct?


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PostPosted: Tue Sep 22, 2009 9:55 am 
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Joined: Sat Aug 13, 2005 10:48 am
Posts: 365
Location: East Texas - USA
Yes and No. The PC ties provide the fixed geometry and give position to the critical dimensions. However, the rails also need a horizontal support - especially under the stress of rail cleaning actions. You can add a few more PC ties to give greater strength and support of the trail bases - but just putting some extra wooden ties will be just as well - provided the wood ties are the same height as the PC ties. The track needs good solid support to keep from becoming 'wavy'. That does not mean the ties as placed for cosmetic and appearance purposes are all required in a staging area.

-ed-

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COSLAR RR - http://www.coslar.us/
NMRA Standards and Conformance Department
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I estimate I have about 5 pounds of coupler springs somewhere in the vicinity of my workbench.


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