A foldable quad-chord truss which can be connected end-to-end with like trusses. Each pair of chords are rigidly attached, and connector members intermediate the ends are swivelly attached to the chord pairs to effect the folding into a compact shape for transport and storage. The connector members are adapted for attachment to connector members of beams which may extend perpendicular to a parallel pair of the trusses and attached thereto. The laid trusses and beams is overlaid with sheets of corrugated sheet metal which overlap each other along their adjacent edges. While standing on a sheet of laid sheet metal adjacent ends of an already laid pair of trusses, another truss can be held adjacent the edge of the sheet metal for attaching an end of the other truss along only one side so that it can then be swung outwardly into a position wherein the other end of the other truss can also be attached to rigidly connect the trusses end-to-end.

Disclosed is a rollable platform that may be unfurled in any orientation over exposed floor or ceiling joists. The platform may be constructed of a specific arrangement of support surface panels and underside joint panels to give the platform both (a) rigidity in a direction that is normal to the support surface via gridlock between the support surface panels and (b) foldability and/or rollability in a direction that is normal to the underside joint panels due to hinged interconnection.

Disclosed is a rollable platform that may be unfurled in any orientation over exposed floor or ceiling joists. The platform may be constructed of a specific arrangement of support surface panels and underside joint panels to give the platform both (a) rigidity in a direction that is normal to the support surface via gridlock between the support surface panels and (b) foldability and/or rollability in a direction that is normal to the underside joint panels due to hinged interconnection.

A digital display mounting and lift bracket can be employed to mount a display device to a wall or other surface or within an enclosure. The bracket can be configured to pivot between an open and a closed position. When the bracket is in the open position, a display device will be lifted upwardly thereby facilitating access to the rear surface of the display device. The bracket can then be returned to the closed position in which the display device will be properly oriented for use.

A roofing ladder bracket and safety assembly adapted to be secured to a roof of a building comprising a base member and a clamping member configured as a ladder clamping mechanism for firmly securing a ladder to a roof of a building and including a safety mechanism to which a worker's safety equipment or a worker's tethered tool can be attached.

A vehicle seating system includes a latch having multiple teeth configured to engage respective windows within a rail to selectively block movement of a vehicle seat relative to the rail. The latch includes a first tooth and a second tooth longitudinally separated from one another. The first tooth includes an inner surface configured to contact a longitudinal end of a first window while the first tooth is engaged with the first window to block movement of the latch relative to the rail along a first longitudinal direction, and the second tooth includes an inner surface configured to contact a longitudinal end of a second window while the second tooth is engaged with the second window to block movement of the latch relative to the rail along a second longitudinal direction, opposite the first longitudinal direction.

A preassembled display system is assembled at a first location by attaching a plurality of display panels to a frame. The preassembled display system is loaded onto a transportation vehicle. Next, the preassembled display system is moved to a second location in a transportation vehicle. The display unit is installed at the second location by attaching the preassembled display system to a mounting unit. A receiver box for providing media to display at the plurality of display panels is attached. The attaching of the receiver box may be performed at the first location and/or at the second location. The plurality of display panels are electrically connected to the receiver box. Again, the electrically connecting may be performed at the first location and/or at the second location.

A preassembled display system is assembled at a first location by attaching a plurality of display panels to a frame. The preassembled display system is loaded onto a transportation vehicle. Next, the preassembled display system is moved to a second location in a transportation vehicle. The display unit is installed at the second location by attaching the preassembled display system to a mounting unit. A receiver box for providing media to display at the plurality of display panels is attached. The attaching of the receiver box may be performed at the first location and/or at the second location. The plurality of display panels are electrically connected to the receiver box. Again, the electrically connecting may be performed at the first location and/or at the second location.

This invention is a mounting system for a loudspeaker system that is capable of positioning and re-positioning the box-like device of the loudspeaker without requiring the use of any retaining/tensioning fasteners. A bracket facilitates constraining the positioning and repositioning for the roll and pitch axes while simultaneously providing audible feedback angular movement indication that enable vertical and horizontal orientation with respect both to the installation environment and to match its positioning to other like installed systems.

The invention relates to a rock processing plant (10) having a process unit (20), to which a working platform (30) that can be walked on is assigned, wherein the process unit (20) has a projection (24.5), which protrudes into the working area formed by the working platform (30), wherein the working platform (30) has a fall arrester (35), in particular in the form of a guardrail, and wherein the working platform (30) has a platform widening (33) in the area of the projection (24.5) to create a working area adjacent to the projection (24.5). To improve occupational safety the invention provides that the platform widening (33) has a floor segment (33.1) as a working surface, which is swivel mounted such that it can be folded or swiveled between a folded-down working position, in which the floor segment (33.1) can be walked on, and an upright transport position, that the fall arrester (35) is guided in the area of the platform widening (33), that at least one locking segment (36.6) is directly or indirectly coupled to the floor segment (33.1) in such a way that when the floor segment (33.1) is moved, the locking segment (36.6) is moved, wherein in the transport position the locking segment (36.6) blocks the access to the projection (24.5) at least in some areas and in the working position the locking segment (36.6) is moved out of the access area.