Yong’inga qarshi eshiklar A, B va C toifalariga bo’linadi. Turar-joy binolari odatda C darajasiga ega, ammo yong’inga chidamlilik chegarasi belgilangan standartga yetishi kerak.

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30 yong’inga chidamli kirish eshigi,yong’inga qarshi devor eshiklari,90 daqiqa yong’in darajasi,yong’in eshigiga kirish,tijorat yong’inga chidamli temir eshiklar,Ko’rish paneli bilan 1 soat yong’inga qarshi eshik, 30 x 30 yong’inga chidamli kirish eshigi,90 daqiqa yong’in darajasi,po’latdan yong’inga chidamli garajga kirish eshigi,tijorat yong’inga chidamli temir eshiklar,30 yong’inga chidamli kirish eshigi,ramkasiz yong’inga chidamli eshiklar,90 daqiqa yong’in darajasi,qozonxona yong’inga qarshi eshik,tijorat yong’inga chidamli temir eshiklar,30 daqiqa tashqi yong’in eshigi,30 yong’inga chidamli kirish eshigi