... 1) It has many excellent characteristics like light weight, large span, and structural stability. 2) Also use few materials, and can ... slope 2)Type: Single slope, double slope, muti slope; Single span, double-span, Multi-span, single floor, double floors! 3) Base: Cement and steel ... Demands for doors and windows 6)Crane (if have), Crane span, crane lift height, max lift capacity, max wheel pressure and ...