C Chong,
I would just like to caution you against trying to design bridge falsework or other temporary work if you have no personal experience in the field, and if you do not have access to a senior supervising engineer who has substantial experience in that type of work.
Just remember that fatal accidents due to falsework failures are all too common. Many of them have been due to incompetent engineering. It is not the sort of work that should be undertaken by beginners.