外そと階かい段だん

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Meanings

1

outdoor stairs; external stairway

Refers to stairs located outside a building, often used for fire escapes or access to upper floors from the exterior.

このアパートの外そと階かい段だんは雨あめの日ひは滑すべりやすい。
The outdoor stairs of this apartment building are slippery on rainy days.
火か事じのときは外そと階かい段だんを使つかって避ひ難なんしてください。
In case of fire, please evacuate using the external stairway.