... 300000 sqm per annum. Enterprise cultureGet to know myself to constantly correct myself;Get to know others to learn from others, and point out ... bolts,nuts, plates, washers ,flange, tension rod ,crane etc. 4) How to order Design Parameters 1) Live load on roof (KN/M2 ... capacity, max wheel pressure and min wheel pressure 7)Size: width X length X eave height, roof slope8)Or your idea ...