1. Ubume bensimbi obuphezulu, ubomi benkonzo ende. Onke amacandelo aphambili ashushu-diphu afakwe isinyithi emva konyango ngokwemigangatho yaseYurophu ukuqinisekisa ukuxhathisa okugqwesileyo komhlwa.
2. Isakhiwo esenziwe ngaphambili. Onke amacandelo anokudityaniswa ngokulula kwindawo eneziqhagamshelo kunye neebholiti kunye namantongomane ngaphandle kwe-welds eyonakalisa i-zinc coating kwizinto eziphathekayo, ngaloo ndlela iqinisekisa ukuxhathisa kwe-corrosion. Imveliso esemgangathweni yecandelo ngalinye
3. Ukucwangciswa kwe-ventilation: umatshini wefilimu okanye akukho festile