A portable structure has a main body and a plurality of telescopic beams. The main body includes a plurality of stacking modules. The plurality of stacking modules are configured to move between a collapsed position and an uncollapsed position. Each of the plurality of stacking modules has an inner surface and an outer surface. The plurality of stacking modules include a bottom stacking module and a top stacking module. The bottom stacking module is selectively and slidably disposed within the top stacking module. The top stacking module has a plurality of holes formed therethrough. The bottom stacking module is nested within the top stacking module, where the plurality of stacking modules are in the collapsed position. The bottom stacking module is unnested from the top stacking module, where the plurality of stacking modules are in the uncollapsed position.

An extendable and retractable column which is formed from at least three linked sections or chains. The linked sections include a plurality of individual segments linked end to end. As the linked segments are extended, each of the individual segments of the linked chains engage individual segments of adjacent linked sections to form a column. As the linked sections are retracted, each of the individual segments of the linked sections disengage from the individual segment of the adjacent linked sections and the individual linked sections may be rolled up into a multi-sided form for compact storage.

The object of the invention is an emergency escape tunnel in a multi-storey building, especially in a building with a centrally situated staircase and useable rooms surrounding it, used to evacuate people in case of a fire hazard. The emergency escape tunnel according to the invention is equipped with a load-bearing skeleton (6) with an outline similar in shape to an upturned letter U, its surface wall (7) and side walls (8) being covered with layers of a fire-resistant material. The tunnel has a self-activating drive system (13, 32, 36) and is horizontally shiftable in the space (14) between the staircase (1) and the external wall (2) of the building. In the resting position, the tunnel is situated within the staircase and in the operating position the outlet section (15) of the tunnel is situated within the exit door (16) of the building whereas its exit opening (17)| is situated beyond the building. To make it possible to use the tunnel in relatively vast spaces of the building, it consists of two or three telescopically overlapping segments (3, 3a, 4), the ends of which are mutually interlocked with their cover flanges (5).

This invention discloses a tower system in which a telescoping tower with a plurality of tower structures is contained within a rigid transportation container in a substantially horizontal position for transportation, may be extended to a height much greater than its contracted length. The tower may be transported horizontal, repositioned to a vertical position and then the individual tower structures extended and secured via spring pins relative to the adjacent tower structure, the erection of the tower sections may be with external equipment such as a boom truck, or utilizing an internal hydraulic cylinder.

The present disclosure is directed to climbing wall assemblies having a variety of improvements. For instance, the climbing wall assemblies may include connectors to attach the surface panels to the framework, in which the connectors may be mounted substantially anywhere along the front of the framework and at substantially any angle, providing for the securement of climbing panels in various geometries. The climbing wall assemblies may also include braces that may easily be adjusted to a desired length and configuration during construction of a climbing wall. The climbing wall assemblies may also include variable-angle, integral front posts, which provide for the easy and stable securement of climbing panels in various geometries. These improvements provide climbing wall assemblies that may be easily assembled to produce a desirable climbing wall structure having few framework components.

A loading platform for use in building construction, the loading platform comprising a support structure adapted to be fixed to a building and extend outwardly from the building; and a deck mountable to the support structure such that the deck extends from the building, the support structure being configured such that at least a portion of an upper surface of the support structure extends level with or below a floor surface of the building when fixed to the building.

A telescopic column includes a first telescopic element and a second telescopic element moveable linearly with respect to one another, at least one drive unit connected to the first telescopic element, at least one connecting element configured to transmit a force from the drive unit to the second telescopic element, a monitoring unit configured to detect an operating parameter of the connecting element, and a switch configured to send a signal to the monitoring unit in response to the detected operating parameter being outside a predetermined range.

A portable multi-functional system having a multi-functional apparatus customizable by way of devices arranged to respectively perform different functions, and a container arranged to be transported by way of ground, naval or air transportation and having predetermined external dimensions is provided. The multi-functional apparatus is secured to the container, and is arranged to take at least two types of layout: a first layout or transport layout wherein the multi-functional apparatus is inside the predetermined external dimensions and a second layout or lifting up layout wherein the multi-functional apparatus projects from the predetermined external dimensions of the container so as to realize a tower. The invention also relates to a method for realizing the multi-functional system.

The present disclosure is directed to climbing wall assemblies having a variety of improvements. For instance, the climbing wall assemblies may include connectors to attach the surface panels to the framework, in which the connectors may be mounted substantially anywhere along the front of the framework and at substantially any angle, providing for the securement of climbing panels in various geometries. The climbing wall assemblies may also include braces that may easily be adjusted to a desired length and configuration during construction of a climbing wall. The climbing wall assemblies may also include variable-angle, integral front posts, which provide for the easy and stable securement of climbing panels in various geometries. These improvements provide climbing wall assemblies that may be easily assembled to produce a desirable climbing wall structure having few framework components.

An extendable and retractable column which is formed from at least three linked sections or chains. The linked sections include a plurality of individual segments linked end to end. As the linked segments are extended, each of the individual segments of the linked chains engage individual segments of adjacent linked sections to form a column. As the linked sections are retracted, each of the individual segments of the linked sections disengage from the individual segment of the adjacent linked sections and the individual linked sections may be rolled up into a multi-sided form for compact storage.