I was searching architectural drawaings of gridshells and I found this really interesting project of a gridshell, curved and with diferences of height. It is a student project of University of Technology and Design of Singapore. It is interesting to notice that the model is made with various type of triangules. Each type has a specific number that will lead to the different curves in the volume. This is really close of what I wanted the bridge to look like in volume. About the cladding, in order to control the view, it is not so closed.
Reference: http://archinect.com/features/article/75126636/student-works-singapore-university-of-technology-and-design-library-pavilion
Reference: http://archinect.com/features/article/75126636/student-works-singapore-university-of-technology-and-design-library-pavilion