Variant of the Canadian wood chip rail car.
Pretty easy model to print and build.
Print two each of the sides, ends and covers, one of the bottom.
(I printed in 0.1mm layer with a 0.4mm nozzle.)
Then just glue the parts carefully together, I usally glue one corner at atime.
Finish with the bottom part last.
The bogie in the photo is https://www.printables.com/model/148149-ho-scale-bogie.
After attaching the couplers (made to use with Kadee #5 couplings, or similiar), glue the cover over them.
To attach the bogie to the car, use the pin, best printed with a 0.25mm nozzle.
To assemble the bogie, just tap the pin in after you have set the wheels in the bogie and placed it on the bottom.
The author marked this model as their own original creation.