CMTX 465 and TKX 700 are those high-walkway cars most likely built by Pennsylvania Tank Car in the early-mid Teens, using the underframe that Standard Tank Car adopted when it started up. QTX 6108 is

Yep, Intermountain PS-1 ends. I just pulled the exact same sprue out of an IM 40998 kit to confirm. David Thompson

Whose reefer conversion is behind the MP gon? David Thompson

It's a pre-war Pullman-Standard lightweight welded box car. NKP's were 20000-20199, built at Michigan City in 1-2/40. David Thompson

There were still tracks the last I was there in the late 1980s. I would assume they’re gone now, but one never knows This is the 21st century, so of course there's a Youtube video: https://www.youtube

D&H 4651 is a sample car of very similar construction, but I do not know of any other examples. https://pullman-lib.smugmug.com/Railroad-D/i-TjBGHWW/A https://pullman-lib.smugmug.com/Railroad-D/i-3xjB

Top chord reinforcements weren't intended to resist vertical sagging so much as to keep the sides from bowing in and out sideways. David Thompson

Yes, it is an additional angle piece to stiffen the top of the side. Retrofitting this angle was typically done some time after the car was built, but sometimes it was an as-built feature. David Thomp

Atlas Powder tank car built 9-15 (with a raised walkway) and an AC&&Y hopper car built 10-19 APCX 1058 is one of those high-walkway cars (probably) built by Pennsylvania Tank Car with the underframe l

The PA&McKR 90-ton Andrews trucks were used under PSCX 1091, a sample battleship gondola built by Pressed Steel Car in 1921 that shows up in the '20s CBCs. This car was leased to Virginian for most of

B&LE is the likely candidate, though Carnegie Steel also had cars of this design. Ralston builder's photo: http://columbusrailroads.com/Ralston%20photos/ralston-142-1914-B&LE.JPG David Thompson

The USRA drawings show four courses for the 10,000 gallon tanks, and three courses for the 8,000 gallon cars, with 5-course radial tanks as alternate constructions for both sizes. David Thompson

As repainted by Greenville in 1930: https://pullman-lib.smugmug.com/Railroad-G/i-VTv5dd7 https://pullman-lib.smugmug.com/Railroad-G/i-t2r6hgK/A https://pullman-lib.smugmug.com/Railroad-G/i-ZdthJTf/A h

A nice complement to the article in PRM Vol. 5: https://pullman-lib.smugmug.com/Railroad-N-Q/i-3DTdsTD/A David Thompson

Nice view of the straight-sill version of the Pressed Steel hopper: https://pullman-lib.smugmug.com/Railroad-N-Q/i-Sv2m93j/A David Thompson

There are some nice photos in there, including this rather fascinating Gl hopper rebuild: https://pullman-lib.smugmug.com/Railroad-T/i-8XP6Ksn/A David Thompson

The poling pocket location on the bolster is typical for the GATC Type 30 underframe. David Thompson

1923 is fairly late for a safety valve elbow, but the dome is rather skinny. David Thompson

Nice B-end view of a later GKd rebuild (the earlier rebuilds had Murphy-style ends). David Thompson

They look like typical L-section Andrews-style trucks. Nothing unusual there for a car built in 1910. David Thompson