1.Data for design:
*live load on roof(KN/M2), live load on second floor(KN/M2) if have
*wind speed(KM/H) or wind load(Kn/M2)
*snow load (Kn/M2) if have
*earthquake grade if have
*crane (if have): crane span, crane type, crane quantity, crane lift height, max lift capacity, max wheel pressure and min wheel pressure.
2.Type of the building
*dimension: width,length,eave height and roof slope
*single slope, double slope
*single-span,double-span or multi-span
*single-floor,double-floor or multi-floor
*whether gutter,rain pipe is needed or not
*Whether daylight bands,ventilators,parapet wall is needed or not