It's a shame you didn't mention the 2-piece tramp earlier. We would have understood better where you were coming from. That explains why you were concerned about the look of the beam - it was a bit puzzling as like David said, the beam is hardly noticeable.

Most of us have forgotten 2-piece tramps even existed. The point is the beam does not affect the size and shape of the tramp at all except there needs to be a small cutout (like a U-shape) at each end.

It's more rare but you can also have the track at the front and lace at the back like this: