Lawang geni dirancang ing dalan umum lantai, lorong geni lan lokasi liyane miturut syarat perlindungan geni bangunan dhuwur. Lawang geni dipérang dadi rong jinis: baja lan kayu. Bahan tembok lan kekandelan macem-macem bahan beda-beda, lan wektu tahan geni beda.

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