How the route check works
Straight through: the two smaller sides of the wrapped piece must fit the width and height of the opening.
On the diagonal: a piece that is too wide can sometimes pass tilted across the opening. The app tests the exact rectangle-in-rectangle condition for that.
Corners and stair turns: a long piece carried round a corner needs room to swing. The app works out the longest piece of that thickness that turns the corner, carried flat, on its side or on end. In an elevator it also tries the piece tilted inside the cab.
It is a first check. Handrails, door hardware, the slope of a stair and low beams can take more room, so when a result is tight, ask J&M whether it can check on site.


