Editing Warhammer 40,000/7th Edition Tactics/Fortifications (section)

===Obstacles===
Any fortification can take up to SIX of any of these in any combination. All of can be up to 6" long, and can be placed anywhere within 6" of a fortification.
*'''Tangle Wire''' - Lines of dangerous terrain that grants 6+ cover. Meh. Take these if you just want to slow an enemy down while they try to approach since they don't give (good) cover to the enemy so you can just use these as a speed bump. Tangle wire is also cheap so basically any model that dies in the wire makes all the points back on your investment.
**While they're basically shit for cover, they can do wonders for your overwatch. Adding dangerous terrain casualties on top of the 2" loss to charge range can be a big boon to forces with strong overwatch and less need of cover (Dark Angels). 
**Alternatively, saturate portions of the board with dangerous terrain to make deep striking difficult.
*'''Barricades''' - Line of difficult terrain and 4+ cover. Basically a sections of ADL without that GtG cover bonus that you can spread more freely. Nothing regulates their height, so make sure yours are high enough to hide at least 25% of your tanks' profile.
*'''Tank traps''' they give a 4+ cover thats great, but not the real reason. The real reason to use these is hilarious, as they are Impassible terrain for all non skimmer/flyer vehicles, including super heavy walkers.