Telescopic boom lift

A telescopic boom lift, comprising at least one vehicle which can move on the ground and supports directly or indirectly at least one telescopic boom adapted to support a work accessory, and a cab configured to accommodate an operator, and further comprising at least one ladder for access to the cab, arranged along a wall of said vehicle and provided with at least one step which rotates with respect to said wall, for a movement of said ladder between at least two configurations for use which correspond to different space occupations of said ladder, in a first minimum space occupation configuration said at least one step facing and being proximate to said wall, in a second configuration with increased space occupation said at least one step being arranged transversely with respect to said wall, wherein said at least one step comprises two arms which are coupled rotatably to said wall about a common rotation axis, and a tread, which is between said arms opposite to said wall and is adapted to allow resting of a foot of the operator at least in said second configuration, in order to allow said operator to access said cab or climb down to the ground, and wherein said at least one step comprises a connecting rib which is interposed between said arms, said rib being arranged between said wall and the respective said tread and having a ledge configured for the resting of the foot of the operator in said first configuration.