Po’latdan yong’inga qarshi eshikning po’lat konstruktsiyasi zarba deformatsiyasi va tashqi kuch bilan zararlanishi oson emasligini ta’minlashi mumkin va uzoq vaqt davomida almashtirilmasdan normal ishlatilishi mumkin.

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45 daqiqa yong’in darajasi,tijorat po’latdan yong’inga qarshi eshiklar,cho’ntak eshigi yong’inga qarshi eshik,ichki uy yong’inga qarshi eshiklar,yong’in eshigi yong’inga qarshi reyting,45 daqiqa yong’in darajasi,yong’inga chidamli tashqi eshiklar, yong’inga chidamli eshiklar 30 x 80,ichki uy yong’inga qarshi eshiklar,uy-joylar uchun yong’inga qarshi eshiklar,45 daqiqa yong’in darajasi,yong’inga chidamli kirish eshigi,45 daqiqa yong’in darajasi,qattiq yong’inga chidamli eshik,ichki uy yong’inga qarshi eshiklar,60 daqiqa yong’in eshigi, 1 soat nominal eshik,45 daqiqa yong’in darajasi