909
« on: January 25, 2010, 04:59:30 am »
Leave it alone until you're ready, that goes without saying.
Read the wiki article on magma for more info apart from what I say.
Using magma safely requires two Z-levels unless you want your forges on the surface (hint - you don't). For this diagram, I'm assuming you use the first two layers, but you probably want to work further down a bit.
.,.,`.`,`.`.`~~~
#############~~~
#############~~~
#############~~~
The surface is unimportant for now. The first layer you use for smithing needs to have a narrower magma area than the next Z-level. Dig through until you are a few tiles short, doesn't matter. The next level down, dig until you are two tiles away from the magma. On the second-to-last tile, smooth and carve a fortification. Install a door, wall or floodgate locking this layer away from the rest of the fort, unless you like floods. I prefer walls as they can't be deconstructed by building destroyers. On the layer above, channel out the last square on the layer below. This will give you a tunnel full of magma, prevented from flooding your fortress thanks to walls being indestructible. On the layer above again, channel out holes every three tiles or so so that magma runs underneath. Since magma furnaces / forges need an empty space (with magma at least 4/7 deep below it) to work, this will provide them with the necessary power. The fortification you carved prevents fire / magma men from reaching the floodgate / door to deconstruct it, and fire imps (which may get pushed through) can't destroy those buildings, you are safe from flooding. Fire imps may pop up through the chanelled holes, but this is unlikely. Stationing a military dwarf nearby to protect your smiths is wise if you haven't killed the imps yet.
TL;DR: Use doors / floodgates / walls, channel out holes for power, use fortifications ( and/or grates) to stop enemies from coming through.
Have a nice Fun.
ungulateman
EDIT: Dammit, ninj'd.