I just came across this catalogue of equipment manufactured by the Seattle Car and Foundry Company. It contains beautiful illustrations and specifications of the cars and equipment they produced in 1913. This would be an exceptional resource document for anyone modeling the early steam era and, particularly, any logging or mining activity. The document is published by gutenberg ebooks and is free to use and share. Check it out!
Tim
https://www.gutenberg.org/files/49341/49341-h/49341-h.htm#FLAT_CAR_DEPARTMENT