Once the crossmember is in the proper location, have a buddy hold the bar while you weld it in place. Notice the Speedglas welding helmet--it’s the trickest thing we’ve seen in a long time. The helmet has a special viewing screen that is unshaded when you are not welding, such as when positioning your welding work. Then, the instant that you strike the weld, the viewing screen turns to its predetermined shade (number 11 shade in our case). As soon as you stop welding, the viewing screen instantly returns to its unshaded clear-view screen.