Figure 8-27. - Connection of diagonal and center horizontal members.
The ladder for the tower is assembled on the ground. As the tower is erected, the sections of the ladder are raised in place by handlines. These sections are then bolted in place. The cabin section is made of wood and is constructed by the Builders and raised in place; but, Steelworkers will be called upon to assemble rails and platforms.
After the tower is complete, one or two people must go over all of the bolts, center punching them to lock them in place. These people must also tighten all the nuts and see to it that washers have been inserted under each nut. This can be repeated after a few weeks as a final check. Figure 8-29 shows the top of a completed tower with a control room and with the guys in place.
Steel towers can be taken down when they are no longer needed and then be erected again at a new location. As the first step in dismantling a tower, remove the guy lines, the electrical conduit for the red warning light for aircraft atop the tower, the platform, and any other accessories. Next, set up your rigging gear so that one leg of the section-preferably the leg that the ladder is connected to - will serve as the gin
Figure 8-28. - Partially erected tower.
Figure 8-29. - Completed tower.Continue Reading