Principle :

Raising mast, also called carpenter mast.

It is the oldest lifting mean known, ancestor of all cranes. Still in use today for
metallic framework assembly.

The one shown here is used to set up a ferris wheel on Champs Elysees in Paris

The mast itself (red) is simply laid on ground and secured to avoid slipping.

The raising winch (blue) is used to lift the load and also to pick up the mast.

The orientation winches (green) are used to maintain the mast vertically and to move
the load laterally by 10% of mast height

The mast winch (purple) is used to tilt the mast. Under load the tilt can reach 25% of
mast height. Depending on tilt angle, the load undergone by this winch can reach 3 times
the lifted load.

The limitations of a lifting mast are the absence of rotation, and limited horizontal
displacement of the load. But it is still used thanks to its simplicity and the heavy
loads it can lift.

LEGO implementation

The mast itself is 120 studs, its cross section is H shaped.

On the top, the giraffe head bears all the pulleys of the lifting hoist (4 threads) and
of the mast hoist (4 threads too)