UV mapping problem - separated triangles instead of one surface I'm new to blender so this is certainty a simple question but i have searched for a solution and can't find any. 
I am trying to UV map an imported CAD model which is a simple beam (se picture below). The problem is that what is one single surface gets divided into several separated triangles in the UV mapping. How do I merge the triangles into one surface?
Just answering this, so it can be removed from unanswered :).

You need to


Apply scale (its at 0,001)  
Merge double vertices (122 overall)
Then UV unwrap