extensible, e.g. telescopic

Full Title

Ladders in general (mounted on undercarriages or vehicles E06C5/00; permanently attached to fixed structures E06C9/00) > with rigid longitudinal member or members > Ladders capable of standing by themselves > free-standing ladders > multi-part (with movable supporting struts formed as ladders E06C1/18) > extensible, e.g. telescopic