Lawang geni baja relatif luwih stabil tinimbang lawang geni kayu, lan kabeh materi baja kadhemen mbalek ora gampang rusak dening manungsa. Pintu baja tahan api bisa diisi karo macem-macem bahan tahan api, sing nduweni kemampuan nyegah geni lan kumelun sing apik, lan uga nduweni efek insulasi swara sing apik banget.

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