Design Parameters
1) Live load on roof (KN/M2);
2) Wind speed (KM/H);
3) Snow load (KG/M2) - If Applicable;
4) Earthquake load - If Applicable;
5) Style of Doors and Windows;
6) Crane (if you have), Crane span, Crane lift height, max lift capacity, max wheel pressure and min wheel pressure;
7) Size: Width X length X eave height, roof slope;
8) Or your idea!
It will be appreciated to tell us your detail requirement!