jim currie said:
I have some photos of a H4 hopper before and after a rebuild and where the RO date is on the two bay above , before the rebuild it has NEW 1 44 after the rebuild it has RO 8 51 . also have a photo of a H2 class three bay and it has LP 6 53 in that spot. just for your info.
I'm not familiar with the myriad classes of N&W hoppers, but if the above mentioned H4 was new in 1944, and was a composite car, it was most likely a "War Emergency" car. After the war, many of these cars were rebuilt with steel sides.
The car shown in the first post in this thread is an H26, which were, I believe, originally Virginian cars. It appears to be a standard USRA 50/55 ton all-steel design, and thousands were built long after dissolution of the USRA. While many of these cars may have been rebuilt during their lifetimes, they would have been restencilled to show a revised "Built date", to reflect the actual date of rebuilding, or a "Rebuilt date" would've been stencilled onto the car in addition to the original "Built date". The former would have been the more common practice.
The placement of the dates near the dimensional data indicates a connection to that data, whereas the "Built date" is located towards the other end of the car.
Cars could be extensively reworked without actually being considered "rebuilt", and there are cases where only the original frame or trucks from a car were reused in its rebuilt form.
The example that you cite about the rebuilt all-steel car being 2000lbs lighter than the composite car certainly demonstrates why these cars were rebuilt as soon as steel became more readily available, as a 2000lb reduction in tare translates into a 2000lb increase in revenue-producing payload. N&W was rostering all-steel 90 ton capacity coal gondolas as early as the mid-teens, and the Virginian was running 120 ton hoppers not much later.
Fluesheet, Champ makes reweigh data useable for all areas of North America, and in various eras. Many different reweigh station symbols are included, but you can also cobble together the correct info from just about any dimensional data decal set.
Wayne