Portable fold-up ladder

摘要: A portable and convertible ladder comprising a series of u-shaped modules each movably connected to the other by hinge means, said having progressively decreasing widths as they approach top when in an open mode, base or rung portion upright sections, module locking means positioned their lower portion, adapted form substantially rigid except for uppermost at upper member fit mate with complimentary male female adjacent least section wider overlapping vertical portions bottom next narrower modules, provided portions.