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[Kadzar]

I just discovered this.

[Scarpa]

Ouch. Yeah I think green glass is only good for magma pumps.

[Quietust]

Odd, since I seem to recall using green glass floodgates in the past for magma without problems. What kind of mechanism did you have attached to the floodgate?

[Kadzar]

Doh! I used diorite!

[bombcar]

It's especially bad because when closed anything works fine.

Then you pull the lever, and it all works!

Then you try to close it off ...

Urist McBurger has died in the heat

[LoneJedi7]

If you attach a non-magma proof mechanism to the floodgate, the floodgate becomes no longer magma proof.   green glass floodgates are magma proof as long as you dont attach any non-magma proof mechanisms attached.   (if you didnt make that mistake its possible that because its an artifact, a bug made it melt) 
im using green glass floodgates on my magma system right now with nickel mechanisms and their holding up fine. (had to mod to make nickel mechanisms because lack of bauxite and nickel is magma proof) 

[NW_Kohaku]

If you attach a non-magma proof mechanism to the floodgate, the floodgate becomes no longer magma proof.   green glass floodgates are magma proof as long as you dont attach any non-magma proof mechanisms attached.   (if you didnt make that mistake its possible that because its an artifact, a bug made it melt) 
im using green glass floodgates on my magma system right now with nickel mechanisms and their holding up fine. (had to mod to make nickel mechanisms because lack of bauxite and nickel is magma proof) 

Ah, I did this one my first time playing with magma... (Oh, so the FIRST mechanism goes in the floodgate! My bad!) fortunately, it was the "empty the magma channel" floodgate, so I just had to wait for the magma to slowly drip down my flush tube to the bottomless chasm before I could safely walk my dwarves in to repair the damage.  (You'd think a bottomless chasm that close to a magma vent might, you know, have some magma in it, too, wouldn't you?)

It doesn't make "the floodgate" no longer magma-proof, it deconstructs the floodgate (and melts the mechanism) when magma passes through, leaving a perfectly retrievable floodgate, provided the floodgate is itself made of magma-proof materials.

[BigD145]

Sometimes you only need a temporary wall before getting your magma forge up and running to make glass or steel. Bauxite is unnecessary for those.

[Dorf3000]

I need to test this, but I do believe that artifacts will completely melt in magma if any part of them is not magma safe.  Also green glass does sometimes melt, depending on what item it is - there was a thread here on the forum testing it out.

[Retro]

Also green glass does sometimes melt, depending on what item it is - there was a thread here on the forum testing it out.

Huh, that's interesting. It's still hardcoded (unless I'm mistaken) so we can't take a look but it seems odd that the melting point would vary so much by object.

[Skorpion]

I need to test this, but I do believe that artifacts will completely melt in magma if any part of them is not magma safe.  Also green glass does sometimes melt, depending on what item it is - there was a thread here on the forum testing it out.

Wrong. I had a steel greaves immersed in magma, and it didn't melt despite the bone spikes.
It was in there for two whole years.

Also, artifact flammables will burn endlessly until put out.

[Dorf3000]

Well that's interesting at least.  So if I can juggle artifact materials so that I get a statue menacing with spikes of lignite, I can set it on fire and have it constructed outside the gate, burning forever?  Awesome.

Oh, here's the thread about glass being magma safe or not: http://www.bay12games.com/forum/index.php?topic=27423.msg333562#msg333562
The answer is 'sometimes'.

[Deimos56]

Well that's interesting at least.  So if I can juggle artifact materials so that I get a statue menacing with spikes of lignite, I can set it on fire and have it constructed outside the gate, burning forever?  Awesome.

It'll cost you at least one dwarf. Probably more like 20.
Flaming things cost dwarves.

[worldspawn]

Well that's interesting at least.  So if I can juggle artifact materials so that I get a statue menacing with spikes of lignite, I can set it on fire and have it constructed outside the gate, burning forever?  Awesome.

It'll cost you at least one dwarf. Probably more like 20.
Flaming things cost dwarves.

You say this as though this is a bad thing. You must remember the life of a dwarf has a monetary value attached to it and an acceptable dwarf to flaming artifact ratio is about 15:1. Factor in the dwarves lost from tapping into the magma as well as ambushes located outside when placing the statue and you have a rough cost of 20 dwarves per flaming artifact statue. Also to be considered is to place such artifacts within the rooms of nobles as they have a negative value attached to them and you'll essentially be making automatic profit from their horrible screaming demise.

[NW_Kohaku]

Or you could just set up your fortress so that your dwarves never go outside, where that statue will be sitting. 

Building an enclosed "greenhouse" for lumber (the only real reason for non-military dwarves to go aboveground past the first year or so) is actually fairly fast, provided you have prepared a large nearby stockpile of stone/blocks.  Just dig up, wall off an area, then build a roof over it between seiges.

... And then there's Tower-caps...