Re: Flat Car Load Placement

Gatwood, Elden J SAD
 

Nelson;

Loading at one end, unless balanced, was highly frowned on. I know we've seen a few of those loads at one end, but it was not acceptable practice. The unloaded end could lift under certain circumstances, and potentially cause a derailment. Loading and securing instructions from the AAR show all loads centered, with the exception (theoretically) of diagonal loads. The ORERs also show info on how some individual flats and gons should have the load distributed. Depressed center and well flats were especially vulnerable to collapse if loaded wrong.

Elden Gatwood

-----Original Message-----
From: main@RealSTMFC.groups.io [mailto:main@RealSTMFC.groups.io] On Behalf Of Nelson Moyer
Sent: Tuesday, August 13, 2019 10:44 PM
To: RealSTMFC@groups.io
Subject: [Non-DoD Source] [RealSTMFC] Flat Car Load Placement

A while back, there was a thread on transformer loads on flat cars, and there was no consensus on where to place a single heavy load, i.e. in the center of the car or over one of the trucks. I was cutting out decals for the Owl Mountain SP F-50- 10 flat car tonight, and there is a stencil to be placed on the center of the side sill that reads:



CONCENTRATED LOAD HERE MUST

NOT EXCEED 50000 LBS



The car has a capacity of 100000 lbs. and a load limit of 134900 lbs. with a light weight of 34100 lbs., so any single load between 50000-100000 lbs. would be placed over one of the trucks. I don't know if this load restriction is unique to the SP, or SP is following a standard practice for heavy single loads. Apparently the fishbelly center sill on the F-5--10 had a deflection at the center of a linear load restriction of 50000 lbs.



Nelson Moyer

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