It seems like a recipe for disaster with obvious better ways to do it.
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Ladders because they need to be carried up glaciers on peoples backs, their strong and light and long. Spikey shoes (crampons) are used for walking on glaciers and theres not much point in removing them for a ladder crossing, you need them at the lips of a crevasse to stay stable on the ice and you can step on a ladder easily with them, there are no spikes in the middle section generally, so you aim the centre of your boot for each rung while crossing. Also with ropes on each side as handrails and if your tied in its pretty safe, Ice screws or snow anchors used to secure ropes can be very strong.
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