Palallin, That sounds great! I will be happy to look at a photograph to see if it will help.
Chris, Mike is right! That is a good catch! Thank you! I just finished checking my engines. I lowered the bridge, put down a piece of cork and fastened a piece of flex track to the switch with the track pins just to make sure it was lined up true. (I see my cork shifted, but no matter for this) My first suspect is the one that is the closest to touching. It is an SD40-2 that has a wide swing. The snowplow pilot isn't the closest to the bridge sides, but the deck of the 'long porch' comes extremely close to touching. It in fact just makes it over the to top the girder. To close to count on if there is any sway.
This is an engine that has proven to be troublesome for me before, and I have been thinking of putting it up for sale. It also catches the door frame of the engine house because the curve of the wye switch is so close to the front of the engine house. (You may not have seen that discussion since it is a couple pages back.)
My steam engines that have the widest swing are the H9 Consolidations. They are okay on the bridge. I did try the Shay for kicks, and I see the side pistons come very close to the near corner of the girder. I forgot to take a photograph of that.
I'll have to think about whether to go with the deck girder sections suggested. I already plan to get some Plexiglas for along the edge of the layout. That particular switch feeds a siding that is parallel to the edge of the table. It is the one place I think a derailment could fall off the table.
