RE: [CBQ] RPO structural requirements

["Rupert & Maureen" <gamlenz@ihug.co.nz>]

Hol

Thanks for the clarification on the RPO strength requirements.

Rupert

 

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From: CBQ@yahoogroups.com [mailto:CBQ@yahoogroups.com] On Behalf Of HOL WAGNER
Sent: Tuesday, 4 June 2013 1:15 a.m.
To: CB&Q Group
Subject: RE: [CBQ] RPO structural requirements

 

Existing cars were not immediately impacted by the strength requirements and many continued in service on wooden underframes/steel center sills with truss rods for a number of years.  Only the ends of wooden cars were required to be reinforced to prevent telescoping in accidents, and this was commonly done on the Q and C&S by placing four vertical sections of rail on each end of such cars.
  
Hol
 

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To: CBQ@yahoogroups.com
From: gamlenz@ihug.co.nz
Date: Mon, 3 Jun 2013 13:47:32 +1200
Subject: [CBQ] RPO structural requirements

 

Re. truss rods and RPO’s.  I’ve had a quick look on the internet but can’t find anything specific other than -

 

“In 1912, the Railway Mail Service developed a set of strength requirements for new cars in an effort to push the car building companies into using steel for the cars' major structural components and underframes. The core of the requirements was that each car should be able to withstand a buffer force of at least 400,000 pounds.” 

There is no mention of the strength requirements for existing cars, although I found a comment suggesting the restrictions didn’t apply to branch-line service.

Can anyone clarify the situation?

Rupert Gamlen
Auckland                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  

 

 

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