Sorry I can't raise the image or grid you mention. My tape measure and the Atlas Dual Bridge width I researched says it won't work for 36" and 40-1/2" Radi curves in the bridge at the end of an 8' wide layout hemmed in by walls.
The "U" is 81" wide which leaves 15" for track-to-wall clearance on two sides which means only minor inches of straight for a bridge in the 081 curve.
It will however work for a Drop Section or homemade much wider "lift" Thru Plate Girder Bridge that will accommodate the wide curve arcs.
There must be some kind of magic that my ancient brain is missing so I will retire from aggravating everyone.
