The top and bottom platform of every level is triangular, made up of three struts

fixed to one another. The top platform of the bottom level, which is also the bottom

platform of the top level, is made up of struts half as long as the struts in the other two

platforms. In a level, every vertex of the platform with a larger base is linked to the ends

of one side of the smaller platform with two struts connected by ball joints. Every level

consists of twelve struts, where the top and bottom platforms consist of six struts. Six

other struts are at an angle, linking the top and bottom platforms.

4.1.3 Deployable Mast

 This is based on the mast discussed in chapter 3. This mast consists of two levels

arranged one over another and is constructed with struts, hinges and rectangular plates

(Figure 4-3).


Figure 4-3. Deployable mast