Steel Ice Span is the seventh level of the Hail difficulty in Holiday Lemmings 1994.
Strategy[]
Turn the first Lemming into a Builder just before he walks off the first icicle so that he seals the gap. While he's working, other Lemmings will arrive so have the next two land on icicles and build as well. Have the fourth Lemming build alongside the second Lemming to get over the wall. The first Lemming will have to join as well since he will have finished his initial ramp by then. Do not let any Lemmings fall through and if they turn left, make them build under a previous ramp so that they hit their heads and turn back right. Ideally, you will have spent ten Builder skills on this part alone.
Your Lemmings will now find themselves in a wide pit, so have one build to get over the right steel wall. Another one must build over the narrow pit just before he reaches it to seal it off with one tile. Finally, zigzag stairs up to the exit and raise the release rate to 99.
You can also send a Climber out of the wide pit to build up to the exit alone, but you risk having to deal with the Lemmings left behind becoming a clutter and assigning a Builder skill to a Lemming heading the wrong way.