Po’latdan yong’inga chidamli eshik – po’lat materiallardan yasalgan eshik ramkasi, eshik bargi ramkasi va eshik bargi paneli. Eshik bargi materiallar bilan to’ldirilgan bo’lsa, u inson tanasi uchun zararsiz bo’lgan yong’in va issiqlik izolyatsiyalash materiallari bilan to’ldiriladi. Po’lat yong’inga qarshi eshiklarning turli xil yong’inga chidamlilik ko’rsatkichlariga ko’ra, ularning yong’inga chidamliligi uchta sinfga bo’linishi mumkin: A, B va C. Turli xil darajadagi po’lat yong’inga qarshi eshiklar turli joylarda ishlatilishi mumkin.

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