... buiding, factory , plant, exhibition hall, gym, dormitory building, bus station, gas station etc.Main frame: welded H beam and column ,surface ... bolts,nuts, plates, washers ,flange, tension rod ,crane etc. 4) How to order Design Parameters 1) Live load on roof (KN/M2 ... slope8)Or your idea!If you have project or plan to build your own steel building, pls contact me feel free. We ...