Re: Photo: Wrecked Freight Cars (Undated)
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Very interesting observation, Dennis. I was surprised at how well the wood-framed cars retained their structural integrity as a rectilinear box, though the corner of the metal roofed car suffered considerably.
But I was curious about the evidently dismembered car number 1776 in the upper left of the photo. Cleanly chopped off, it appears, and where is the rest of that car?
From: main@RealSTMFC.groups.io <main@RealSTMFC.groups.io> On Behalf Of Dennis Storzek
Sent: Tuesday, June 22, 2021 12:36 PM
Subject: Re: [RealSTMFC] Photo: Wrecked Freight Cars (Undated)
On Sun, Jun 20, 2021 at 10:07 AM, Bob Chaparro wrote:
Coming in late here, but this photo is an excellent example of the problems with early steel roofs, and why they were so slow to be adopted. Looking at the wrecked cars in the pile, only one has a steel roof. The cars with the double board roofs are mostly intact, while the one steel roof is completely destroyed; all of the seams between panels have split open. Admittedly, the car has likely endured extreme racking, but wood framed house cars ( and the early steel framed cars with less than optimal stiffness in the roof structure) where known to rack in normal service, termed "weaving" in the trade press of the day. Because of this the sheets of the early steel roofs would loosen from the car, and leak. The initial solution to this problem was to add heavy metal clasps to the edge of the roof, the theory being that this allowed larger screws into the eave, to better hold the sheets in place. The car in the photo has these, two per panel. However, as the photo illustrates, this really was not effective because it didn't address the basic problem.