Kundalik hayotda yong’in xavfidan ehtiyot bo’lish kerak va yong’in eshiklari ham ko’pchilikning tanloviga aylandi. Chelik yong’in eshigi po’lat ramka va po’lat eshik fanining kombinatsiyasi. Chelik konstruktsiya deformatsiyaga oson ta’sir qilmasligini ta’minlaydi, tashqi kuchlar ta’sirida shikastlanmaydi, uzoq vaqt almashtirilmasdan ishlatilishi mumkin.

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