The loader crane's arm consists of jointed sections that unfold to increase the arm length, some of these sections may be telescopic. But in telescopic crane, the arm which consists of number of tubes fitted one inside the other is one piece often powered by hydraulic system that extracts the tubes to change its length
This type of cranes can also be truck mounted crane if it is put on crane. This modification gives it the ability of being mobile crane. Telescopic cranes are used in construction for short term usage, rescue operation, lifting damaged cars off the road and also in putting heavy items like transmission towers and steel columns in place
