You may of seen a static base on a tower crane but then again there is a good chance you haven't.
That is because they are just not as common as a crane base that is anchored to an in ground concrete pad
A static base is an anchor or footing for the tower crane. It is a substitute for a concrete pad that the tower crane is usually anchored to.
The static base does have the disadvantage that 1. It is an additional accessory that needs to be hired or purchased.
2. They are much wider than the cranes tower so will take up more ground space, some jobs will not be able to use them due to space considerations.
The advantages however can far outweigh the disadvantages
2. No having to wait for concrete to reach the required strength / MPA before installing the tower crane. The crane can be installed the same day as the base, cutting out lead time of up to 28 days.
This is where the static base really saves builders and their customers money as it not only eliminates the need for a concrete pad but it also eliminates the need for tower sections to be installed, which can cost $30,000 per 4m high section on larger cranes.