Is 30# braid with a diameter of .012'' strong enough to pitch docks?

The docks I fish don't contain very much cover other than rocks and boulders.

Short answer.....yes.  30lb braid is strong enough to do a lot of things with.  I've punched and flipped with it and use it for frog fishing.  You shouldn't have any problems.

#30 is plenty but be aware that braid isn't the most abrasion resistant against things like rocks. 

Awesome. Thanks a lot for your replies!

Not in my book, no. If you insist on 30# braid, at least use a leader for abrasion resistance.

I fish 30lb. Seaguar Kanzen on both Geneva and Delavan pitching and skipping docks.  The only problem is the pike cutting off, but braid, fluoro, or mono that is going to happen.  Landed a 39in. pike with that line, no problem.