Look at the caged area around the service door behind- everywhere near the locks and handles has extra layers of small gauge mesh to keep their fingers out... This 'bridge' seems to have been rather an expensive mistake. At least Rope walkways are less expensive to replace. With this they will just have to keep redoing it over and again, and the orangs will deconstruct it quicker each time probably....
Mali is a very determined orang! She got the 'tool' she's using here from the collapsed bridge and was persuaded by the keeper to exchange it for some strawberries. A poor exchange - she could have had a lot more fun with it