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The inside of the steam dome shroud joint. Not very pretty, but it works. Unexpectedly, the shroud is a bit tapered, not perfectly cylindrical. The bottom end goes over the outside of the base casting, whereas the top of the unit is compressed into the interior of the top casting, all this in order to shed rain and snow water. The upper portion of the butt joint was trimmed to eliminate overlap, and the bottom region needed opened up to straddle the bottom casting. In this shot, bolts are securing both sides of the butt strap, but only temporarily. One row of bolts is slated to be replaced with round head rivets. The socket style button-head screws of the other row will remain, with the nuts tack welded to the inside of the casing. From the ground this will look like two rows of rivets.
Photo by Rick Brigger