Flowcharts: Plate--- Cutting lay-off--- Hanger plate--- T type assembling--- 90turn--- Hoisting-- H-beam assembling--- Hoisting--- Welding of angle seam I--- 90turn--- Welding of angle seam II--- 180turn--- Welding of angle seam III--- 90turn--- Welding of angle seam IV--- Convey--- Rectification of flange slab I--- 90turn--- Hoisting--- Straightening of flange II--- Convey--- Welding of rib according to practical --- Convey--- Surface Shot blasting--- Remove Shots--- Convey--- Oil paint--- Packaging for leaving factory