What are four professions associated with designing and constructing a bridge?
I have Civil/Construction Engineer and Surveyor so far. I need 2 more please.
You may find some more ideas in these search results:
http://www.google.com/search?q=jobs+involved+in+bridge+construction+&rls=com.microsoft:en-us:IE-SearchBox&ie=UTF-8&oe=UTF-8&sourceid=ie7&rlz=1I7SUNA