... sandwich panel 4 ISO9001 1500sqm Fire-proof Large Span Steel Structure Plant I IntroductionCompared with the traditional ... customers. It is mainly used for large-span structures, workshops, warehouses, office buildings, large supermarkets, logistics warehouses, showrooms, hangar ... :Single slope, double slope, muti slope; Single span, double-span, Multi-span, single floor, double floors! 3)Height: 3 ...