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RE: (erielack) Guard timber, rail, and rerailers
From RMC May 2007 pp 84,85 (paraphrased)
The Manual of the American Railway Engineering Association, in it's edition
of 1911 defines a guard timber as [A] longitudinal timber framed over the
ties outside of the track rail to maintain the spacing of ties ... Great
Northern ... The so called outer guard rails on bridges function only as
tie spacers and should not be dependent to hold derailed cars in alignment
... UP common standard 326 ... the UP refers to this timber not as a guard
timber but as a tie spacer
The tables in the article, source of my original question, were compiled
from the railroads answers to American Railway Engineering Association
"circular letter" questionnaires circa 1910, 1920, 1960 ... to participating
railroads. Apparently the lack of DL&W information in the tables is
because they didn't answer the mail ... or [another question] maybe the DL&W
didn't participate in the American Railway Engineering Association?
Thanks
Frank
- -----Original Message-----
From: Dlw1el2_@_aol.com [mailto:Dlw1el2@aol.com]
Sent: Tuesday, April 10, 2007 6:51 AM
To: erielack_@_lists.elhts.org
Subject: Re: (erielack) Guard timber, rail, and rerailers
In a message dated 4/9/2007 11:57:21 P.M. Eastern Daylight Time,
schuyler.larrabee_@_verizon.net writes:
Bob, that's because part of the purpose of the guard timbers, besides the
bloody obvious one of guiding things along the track direction if it
derails, is to provide additional strength in holding the ties
longitudinally along the track in proper spacing, both from the creeping
action a train causes (Think about when you smooth out a blanket, you push
the material ahead of your hand - the weight of the train does exactly the
same thing to the rails), and from the sliding action a derailed car or
locomotive could cause. Without the lap joint (not really a
dovetail) the guard
timbers would pull apart at that joint.
SGL
Schuyler
Yep, I understand all that. Just didn't know if there were rules that
said you had to do that, or that everyone just did it on there own, cause
it was a good practice, that helped the cause.
Bob
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