At one time it was explained that the UPS material handling system max out just short of adult size bike boxes.
It was a crapshoot for the boxes, and if the didn't make the gates, the box would be hand "handled". Horizontally, vertically,
inverted or some combination.
And then there are the drivers who just don't care a whole lot.
I did hear that if you label your boxes as large screen tv's , they get better handling.
Hmmmm.
Anyone use Fastenal shipping ?