So it would appear that the Safari Adventure Junglebridge01 (0900F346) is some kind of Anti-Navmesh device. No matter what i did i could not get settlers to use it. Even when I placed floor pieces for them to use instead of the bridge surface itself they would not use it. If I took the bridge away the settlers would use the boards I put down. Even if I put the bridge underneath the boards and not even touching the boards the settlers would not use the boards. Navmesh blocks do not help. My apologies for the cross posting, should have came here first.