National Tube Works: 1910

Pittsburgh, Pennsylvania, circa 1910. “Furnaces, National Tube Works.” 8×10 inch dry plate glass negative, Detroit Publishing Company.

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There is so much information in this photo that you could spend a long time just slowly looking at every little thing. Quite wonderful.

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About etraxx

Retired from the Army in 2006. Served during Vietnam - 1969-1972 as as 72B - Communications Center Specialist (Teletype Operator). Got out .. and went back in 1987 as a 19K - Armor Vehicle Crewman - (M1/M1A1 tanker) getting out in Korea in 1999. Went into the Reserves .. got mobilized in 2001 .. stayed active until my retirement with 20 years in 2006.


National Tube Works: 1910 — 2 Comments

  1. Wonderful photo. It was photos like this at Mount Savage that got me interested in US Railroads many years ago. The detail about the industry and the people is all teher to be seen & pondered over.

  2. Ken,
    Yeah. That’s why I decided to start posting up those that I find really interesting and worth sharing. I found that .. I would remember seeing a photo and not be able to find it again!

    In this photo I just now focused on one thing .. that L.S.&.M.S. hopper sitting on the end of that lead. The trestle has been all but buried. I understand they did that to prevent the wood from catching fire as easy.

    Between the stringers and the bent caps they have used corbels. That’s the first time I have see that used. In “A treatise on wooden trestle bridges” by Wolcott Cronk Foster pub 1897 … on page 42 (Chapter V. Floor Systems) it says –

    “Corbels are pieces of timber placed lengthwise of the stingers, between them and the caps. They are usually from 4ft to 8ft long, extending equal distance on either side of the cap. They are not much in favor. for good reasons. To a certain extent they are useful, but hey also have many disadvantages. They give extra support to and consequently strengthen the stringers; but for various reasons, as the stringers should not be made lighter on this account, this does not count for much. They also add stiffness to the stringer-joint, but sufficient stiffness for all intents and purposes may be obtained from a well-designed joint without them. They add to the cost, not only in labor and lumber, but also require the use of a considerably larger amount of iron. They increase the number of joints, and hence the places for lodgement and beginning of decay. If, however, it is thought desirable to use them, the different ways of fastening the stringers to them, and they in turn to the caps, may be seen in Figs. 54 to 61.
    Corbels should be notched down about 1 in. over the caps. A peculiar and rather commendable method of separating the corbels from each other by cast-iron blocks, as adopted by the Chicago & Northwestern Railroad, is shown in Fig. 60.”

    I was in the middle of my first cup of coffee looking at that and thought at first that they probably uses those because of that trestle mounted car stop .. at least that’s the only thing that came to mind. I then noticed they used them on all the other caps too. Huh. Still .. adds to the interest the photo provides!

    The other thing is how they braced the thing against the shock of the car hitting that car stop. I need to do something like that with my pier. I had thought of it but it had slipped my mind.

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