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[McWaffle]

I'm constructing a tower and am trying to use ramps instead of staircases (for the hell of it mainly) but the seem to stop working after a while. Dwarves will initially be able to go up, and will start to build on the next level, but then after a little while nobody can get up or down and I have to build a little staircase up to the level to save them.  Am I doing something wrong or is this a bug?  Sorry if it's just me messing up and/or this has been covered.

[Align]

Are the ramps supported by walls?

[N35t0r]

ramps only work in one direction. Things entering one of them can only exit on the opposite tile on the level above/below, as appropiate, so, for example, a 3x3 block of ramps wouldn't work. check if you've got free space appropriately.

[JoRo]

I had this problem, and it later turned out in the 3d visualizer that the dwarves had somehow dug ramps facing the wrong direction.

[Sowelu]

Does the visualizer actually have that kind of information?  I always thought it made it up.  That's really neat though.

[Ziusudra]

Here's an example: When a dwarf builds that last piece of the wall, the bottom ramp breaks and the dwarf is stranded on that bit of floor.

Here is the dwarf now, building a wall he could only get to using the ramps.

So it would seem that they can move diagonally from the top of the ramp, and the top of that bottom ramp is on its south side. (While the top of the upper ramp must be on its west.)

I think what's needed is a way to specify the ramp direction, like for drawbridges.

[Nesoo]

I can't say that I usually use ramps, but from what I've heard and if my understanding is correct, if that's a constructed floor between your ramps and NOT a wall on the same level as the down ramp (in the first picture) that would probably be your problem. It would think that the ramp can only go to the 3 walls it's touching along it's southern side, and not to the "floating" floor to the west. So, if that is a constructed floor, removing it and building a wall on the level below there instead would probably work.

[Ziusudra]

It was a constructed floor, but it was constructed after the lower ramp. I think reconstructing the ramp after it broke would probably have then linked it to that floor.

I'm using stairs to finish the outer wall. The final design includes ramps that will be constructed in a way that removes any doubt of their intended direction.