@OTS posted:Never having done this scale..feeling the weight of the two locomotives I have now.. I'm concerned going too wide on the shelf for two reasons.. the leverage put on the wall anchors and if I go two tracks I will probably elevate the one closest to the wall so you can see that track better. That's the plan.. SMH..lol.
I think you'll find that any decently supported one foot wide shelf will easily support two good sized O-gauge trains comfortably. Even decent drywall anchors will support 50-60 pounds. I don't recommend that, I'd make sure I was connected thoroughly to the studs, that should alleviate any issues with weight, assuming the actual shelf and supports themselves were up to the task. I wouldn't be that concerned about the weight handling of the shelves providing good construction practices are used in their creation.