Abstract: A frame and ladder assembly which includes an electrically conductive frame that is provided to engage two, generally parallel, aerially suspended, transmission conductors of a phase bundle and to be supported therefrom; within the frame a side opening structure which defines a cradle is provided, and in the cradle structure is provided means to engage the phase, such as a plurality of rollers with circumferential recesses, so that the frame can be repositioned along the phase similar to a carriage, without disengaging the frame from the phase; the ladder assembly comprises an insulated triangular ladder assembly which is attached at its vertex to the frame and hangs beneath it, permitting a line worker situated on the ladder assembly to easily perform maintenance and repairs on an energized phase directly above the ladder assembly; the ladder assembly is also comprised of pivotally connected ladder legs so that when the top of one of the two inclined side ladders is released from the frame, the other ladder