Oghere ọnụ ụzọ nke UL fireproof ọnụ ụzọ bụ nke galvanized efere efere, na ọnụ ụzọ akwụkwọ ozi nke galvanized efere efere, igwe anaghị agba nchara efere, na mkpuchi ígwè efere. Ime na-ejupụta na perlite fireproof ụzọ isi efere. Ogo nguzogide ọkụ nke ọnụ ụzọ ọkụ ọkụ UL bụ nkeji 20-180, biko kpọtụrụ anyị.

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