A truss frame for a bridge and/or support includes two elongated, parallel longitudinally-extending post pipes having an outer circumference; two parallel crossbars extending perpendicularly to the post pipes; and a length-adjustable elongated diagonal element. The parts are hingedly and detachably bolted to one other. Two parallel connecting plates secured near each post pipe end extend away from one another on a common, imaginary plane containing the post pipe and crossbar longitudinal axes. Each crossbar and diagonal element has opposite ends hingedly and detachably bolted to a connecting plate. At least two rosettes are welded to each post pipe at a distance from one another corresponding to an integer multiple of a module scaffold modular size. A connecting body is welded to the connecting plate near at least two post pipe ends associated with the same crossbar and surrounds the respective post pipe outer circumference.

Described herein are embodiments of an improved modular scaffolding system. Various embodiments are described herein relating to scaffolding systems wherein truss sections can be coupled together with connectors to achieve length modularity. To assemble the truss sections, each connector is positioned within an opening defined in the horizontal runners of each truss section, such that the connector extends between successive assembled sections, and the connector is further fixed to each section with one or more fasteners. Additionally, each truss section has a vertical member extending between the horizontal runners proximal the connectors in order to enable acceptable vertical loading characteristics.

A runback backstructure access system for removably providing access between building floors of a building structure. The system includes: first and second tower legs with first and second rosette attachment connectors; a first landing beam mountable between the first and second tower legs; first and second landing beam support connectors connectable respectively to the rosette attachment connectors; at least one building support connector for connecting the first landing beam to the building structure; third and fourth tower legs with third and fourth rosette attachment connectors; a second landing beam mounted between the third and fourth tower legs; third and fourth landing beam support connectors for connecting to the third and fourth rosette attachment connectors; and at least one strut member for connecting the first landing beam to the second landing beam.

A truss frame for a bridge and/or support includes two elongated, parallel longitudinally-extending post pipes having an outer circumference; two parallel crossbars extending perpendicularly to the post pipes; and a length-adjustable elongated diagonal element. The parts are hingedly and detachably bolted to one other. Two parallel connecting plates secured near each post pipe end extend away from one another on a common, imaginary plane containing the post pipe and crossbar longitudinal axes. Each crossbar and diagonal element has opposite ends hingedly and detachably bolted to a connecting plate. At least two rosettes are welded to each post pipe at a distance from one another corresponding to an integer multiple of a module scaffold modular size. A connecting body is welded to the connecting plate near at least two post pipe ends associated with the same crossbar and surrounds the respective post pipe outer circumference.

A prop-brace coupler has a first section configured to be selectively connected to a vertical prop member of a construction platform that includes a vertical spacing member and a diagonal bracing member. The prop-brace coupler also has a second section configured to be selectively connected to the vertical spacing member and to the diagonal bracing member.

The present invention provides a fastening unit for attaching a first beam to a second beam, wherein the second beam is arranged substantially perpendicularly to the first beam, the fastening unit having a first axis and a second axis, wherein the second axis is substantially perpendicular to the first axis. The fastening unit comprises a connecting member extending in a direction parallel to the first axis of the fastening unit and having a first edge portion, a second edge portion and a central portion, the connecting member further comprising a coupling element.

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.

A platform and a kit therefor. The platform and the kit comprises quad-chord trusses attachable end-to-end and having connector members intermediate thereof, and further comprising beams attachable at their ends to the connector members so that a beam attaches two parallel trusses. A truss comprises first and second pairs of chords which are foldable for storage and transport and unfoldable to use for erection of the platform. A track lies between the upper chords to allow movement of bolts along the track into position to attach for insertion into decking apertures for attachment of the decking. The kit also includes a sturdy and reliable and easy to use tie-up mechanism and railing along the platform perimeter which is quickly and easily attachable and reliable.

A platform erected by adding an other platform portion to an existing platform portion, as illustrated in FIGS. 20 to 23, by holding a first other truss adjacent decking of the existing portion, connecting ends of sides of the first other truss and a first existing truss with a first pin, swinging the first other truss about the first pin, and connecting ends of other sides of the first other truss and first existing truss with a second pin. In order to similarly connect a second other truss to a second existing truss, the first pin is removed and the first other truss is swung out of the way. After the second other truss is connected to the second existing truss, the first other truss is swung back into position and the first pin re-inserted. Decking is applied to the first and second other trusses.

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.