... produce light and heavy steel structure buildings in protal frame and dome frame, such as warehouse, workshop, storage, hangar, chicken shed, steel ... hall, gym, dormitory building, bus station, gas station etc.Main frame: welded H beam and column ,surface of steel with painted ... bolts,nuts, plates, washers ,flange, tension rod ,crane etc. 4) How to order Design Parameters 1) Live load on roof (KN/M2 ...