Most of the time there is an elevator inside the tower that takes them up at least 3/4 the way to the top. The top of the tower (can be as much as 400') is the antenna and not the tower. To erect the tower we use a piece of equipment called an gin pole. It looks like a tower section that is bolted along side of the tower and hoists the tower sections into place. Then you bolt it on and move the gin pole up for the next section. A tower this tall could take a couple months to erect.