The present invention is a modular system for delivering material directly to a blender hopper. The system includes primary base and optional secondary base modules supporting surge hoppers which receive material from material containers. The surge hopper may then dispense the material directly and rapidly to the blender hopper by gravity feed. During continuous operation, exhausted material containers may be removed from the surge hoppers and replaced with full material containers as material empties from the surge hoppers. This allows steady, high-volume flow of material to the blender hopper.

A portable aircraft maintenance stand includes a frame assembly and a deck. The frame assembly has a base portion and an upper portion. The deck is mounted to the upper portion of the frame assembly and includes a cantilevered portion. The deck also has a gap configured to receive an engine of an aircraft such that the deck at least partially wraps around the engine. The cantilevered portion of the deck is configured to be positioned vertically above a wing of the aircraft while the base portion of the frame assembly is positioned vertically below the wing.

A cage for surrounding a section of a work area of the top of rolling stock includes an inboard side, an outboard side, a front end section and a back end section. The inboard side of the cage is attached to an associated deployment apparatus. Each of the two sides can define a pair of fence notches to slide over the rails surrounding the work area. Each of the two end sections can define an inboard notch and a center notch. Some embodiments of the end sections can define an outboard notch that includes a self-adjusting straddle. The cage can be provided as part of a portable fall protection device that includes a telescoping positioning mechanism.

A shoring structure for insertion inside a tank through a manway of the tank and for installation under the floating roof of the tank. This shoring structure has: a telescoping upright structure made of detachable elements; and these detachable elements being configured for movement through the manway of the tank. Foldable top and bottom panels are mountable to the telescoping upright structure, the top and bottom panels being also respectively configured for movement through the manway of the tank. The foldable bottom plate being configured for integration of a pallet jack thereto, for movement of the shoring structure in a raised position inside the tank when the top and bottom panels being mounted to the upright structure. In another aspect, there is provided a combination of a shoring structure and a pallet jack incorporated in this shoring structure. Also described is a method of inspecting or maintaining a tank.

Disclosed is an arrangement including a staircase as well as walkway systems. The staircase includes a transitional member, and the walkways incorporate grate supports in order to facilitate the connection to adjacent structures. The arrangement also utilizes angled members which are configured with a reinforced flange existing in a dimension that has higher load requirements than the other flange. A novel step configuration is also disclosed.

An adjustable platform assembly for supporting workers and supplies about an elevated work site, the platform assembly being movably supported on an articulable support, the platform comprising a stationary curvilinear rear bridging panel arrangement having a 1.sup.st side curvilinear platform member and a 2.sup.nd side curvilinear platform member, each comprising a floor and railing assembly, wherein each elongated 1.sup.st and 2.sup.nd curvilinear side platform member floor and railing assembly is independently movable on support members outwardly and inwardly, with respect to the curvilinear bridging panel arrangement, to change the platform assembly back and forth between a generally C shape to a generally O shape, or any peripherally adjustable combination thereof, as required.

To ensure maintenance operations for an architectural structure using a mast climber without any limitation on the stability of a mast and locations where a mast can be erected. A side wall 101 of an architectural structure 100 is fitted with a fixing member 130 at a level higher than the ground 500. The fixing member 130 is fitted with fixture studs 132. A mast 200 is erected on the fixing member 130 with its lower end secured to the fixture studs 132. A climbing work platform 210 that travels up and down the mast 200 is fixed to the mast 200. A worker performs maintenance operations on the climbing work platform 210.

The present invention is a modular system for delivering material directly to a blender hopper. The system includes primary base and optional secondary base modules supporting surge hoppers which receive material from material containers. The surge hopper may then dispense the material directly and rapidly to the blender hopper by gravity feed. During continuous operation, exhausted material containers may be removed from the surge hoppers and replaced with full material containers as material empties from the surge hoppers. This allows steady, high-volume flow of material to the blender hopper.

An assembly table for use in a remote manufacturing yard is provided. The assembly table is configured to be collapsible thereby allowing for a reduced footprint during transportation. The assembly table can include a central support base; a plurality of arms attached to the central support base; a secondary support member attached to each arm configured to provide support for and give height to the assembly table when in use; and a centering guide attached to each arm, the centering guide configured to receive a bottom portion of a partial shell, the centering guide located at a predetermined location of its own arm.

Disclosed is a founding system for mounting in the interior of a structure having rounded interior walls, such as a coker. The founding system includes one or more generally horizontal support layers. In one example, each horizontal support layer has four support beams and four connection elements mounting the support beams. Each connection element has a flat edge tangential to the rounded interior walls of the structure, a foot extending from the flat edge to abut the interior of said rounded interior walls, and two mounts for mounting two of the support beams at an angle of about 90 degrees.