11-20-2014, 08:16 AM
In the first plan that NSHO posted on this page about the brewery he has 2 boxcars on spots A and B, using the ruler at the bottom of the diagram I saw they're about 14 inches long. Now if you look at the the tank car on spot C in roughly lines up with the edge of the building at the bottom of the plan. If you start from the edge of that building and go left 14 inches, 2 boxcars will end up right on the switch making switching either very close or not possible. NSHO then extended the siding for the tank cars towards the right which definitely helped but adding a 3 way switch will extend both siding towards the left that could make a difference of cars just barely passing each other to giving it a few more scale feet of clearance. Adding a 3 way switch added about 7-8 inches and about 3 inches extending the siding to the right.