... Length: as Required Zinc Coating: 60-270G prepainted steel coils(PPGI) :Please offer the details as follows ... frames, light steel structure house, sliding doors, sceiling, bathrooms, interior elevator lobby, stairs ventilation channel, communication channels. etc. ... retailer booth, roller shutter door Inside: door, doorcase, light steel roof structure, folding screen, ceiling, elecator, stairway, vent ...