Re: question about truss rods and brake wheel staffs - Wrong question ??


bill_d_goat
 

--- In STMFC@yahoogroups.com, Malcolm Laughlin <mlaughlinnyc@...>
wrote:

Perhaps asking when truss rods were outlawed is asking the wrong
question. The more relevant questions are:

1. When were the rules changed so that truss rods alone would not
do ? -- requiring steel center sill.

After that time, truss rods might still have been used for
additional suupport.

2. At what time were strnght requirements for underframes
increase to the extent that the additional support provided by truss
rods became irrelevant.



Malcolm Laughlin, Editor 617-489-4383
New England Rail Shipper Directories
19 Holden Road, Belmont, MA 02478

[Non-text portions of this message have been removed]
Good questions!
I know GN had rebuilt reefers with steel underframes which still
retained trussrods. Was it done that way because it was cheaper than
rebuilding with stronger steel underframes (and it was allowed) or
was there another reason?
Bill Williams

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