Okay, here's the idea:
a wall that has a tube running through it. If the wall is destroyed, the tube would still act as any other tube would, and rebuilding the wall would require removing the tube first.
reason: to provided added security to structures that require a tube connection.
pros:
- Line of Sight (LS) weapons cannot hit the structures, as there is a wall completely surrounding them
- Provides more cover for structurs close to an exploding structure.
cons:
- Rebuilding the wall could require you to have a disabled/idled structure for a while
- Repair vehicles would need a hole in the surrounding wall to get in and out--which is only a problem if you don't keep one repair vehicle dedicated to the building inside.
Note: this would only be available with normal walls, as it would be kinda rediculous to do it with a specialized wall. I mean, if you have a lavawall up, a hole in it is the last thing you need
*Awaits the imminant critisizm for this idea and any spelling/grammer errors which may be pointed out for no reason in particular*