... , sandwich panel 4 ISO9001 1500sqm Fire-proof Large Span Steel Structure Plant I IntroductionCompared with the traditional concrete ... with the customers. It is mainly used for large-span structures, workshops, warehouses, office buildings, large supermarkets, logistics ... , roof slope 2)Span: 9-180m,type:Single slope, double slope, muti slope; Single span, double-span, Multi-span, single floor, double ...