The warehouse is unheated, so dress warmly.
The street in front (NW 29th Ave) of the building is currently closed part of the block and may still be so on Jan 30, so you may want to approach from another street. If you do not find street parking, they do have a parking lot as you can see in the satellite view. The street on the north side is NW Industrial St. The street on the west side is NW 30th Ave.
Staver Locomotive web site
Below are two views that may aid you in finding Staver locomotive.