corrugated iron sheet
Refers to a wavy iron sheet used for roofing or walls. The name comes from the resemblance to the texture of a sea cucumber (海鼠).
The warehouse roof is covered with corrugated iron sheets.
Corrugated iron sheets are light and durable, so they are often used for temporary buildings.
Standard kanji spelling. 海鼠 means sea cucumber, and 板 means board, referring to the wavy pattern resembling a sea cucumber.
Mixed kana-kanji spelling, common in everyday contexts.
Compound of 海鼠 (namako, 'sea cucumber') and 板 (ita, 'board'), from the resemblance of the wavy pattern to the texture of a sea cucumber.