Abstract: There is provided the combination of a frame and a collapsible ladder. The frame defines two spaced-apart horizontal passages in which catch elements are mounted. Resilient means urge the catch elements toward each other, and manual thumbscrew means are provided to pull the catch elements away from each other. A collapsible ladder has attachment means at the top by which it can be anchored, and the ladder also includes a containment means constituted by the bottom rung and two upstanding side members which register with all of the remaining rungs. The upstanding side members have openings at the top into which the catch members extend when in their innermost positions. Manual release is possible by which the side members become disengaged from the frame, thus allowing the web ladder to fall into a position of use.

Abstract: This invention provides a collapsible web ladder in which a number of flat step members are connected to two flexible webs by virtue of T-shaped recesses in the ends of the step members. The flexible webs lodge in the recess portions corresponding to the cross-bars of the T's. Each web has affixed to it a plurality of spaced-apart block members which are adapted to lodge against and underneath the cross-bars of the T-shaped recesses, whereby weight placed on a step member can be transferred to the web.