... 300000 sqm per annum. Enterprise cultureGet to know myself to constantly correct myself;Get to know others to learn from others, and point out ... . If you have drawing of project , we will help you to calculate the quantity of your project and the comepetitve price. If ... bolts,nuts, plates, washers ,flange, tension rod ,crane etc. 4) How to order Design Parameters 1) Live load on roof (KN/M2 ...