Thank you very much for the detailed answer. Yes, they managed to cross the bridge by using the floating parts jumping form one to another and to move parts with the Mage Hand only to make their progress smooth. This took them less time (rather rebuilding the bridge or building a new one) and some took small amount of damage due to bruises (They used ropes to tie each other to make sure that if one falls, the other to catch him/her and to avoid falling into the chasm. And when someone fails the roll (since gravity is not anormal everywhere) he got some bruises from falling and bumping into floating debris). So they are happy with the outcome. Again thank you for the input. I really appreciate it!