Due to the conical shape of the base body and the reduction of its diameter in height, the placement of parts inside each other is accompanied by friction between the outer surface of the lower part and the inner surface of the upper part, and the transfer of stresses in the area of the connection between the two parts is done with the help of this friction. Due to the joining of parts and the similarity of this system to a telescope, the name of this type of masts is called telescopic masts.

The main reasons for using telescopic masts are the small cross-sectional area of the foundation and at the same time their ability to withstand high forces. Among the advantages of this type of rigs, we can point out the acceptance of more mechanical forces, longer life, more beautiful appearance and less width, occupying less space and needing less foundation. Among the disadvantages of this type of rigs, we can mention higher relative price, more corrosiveness in corrosive environments, higher installation cost, higher repair and maintenance cost. Having construction equipment and the technical knowledge of masts, Pars Sakhtar Company designs and manufactures steel telescopic masts in different dimensions and types.