Abstract: Scaffolding including at least: two posts (1), a lifting working bridge (2) and a lifting platform (3), said scaffolding being made of modular elements, connectable to each other in disassemblable manner, each post (1), which is triangular in cross section, being formed; by a base lattice element (7) which can rest on the ground selectively by means of wheels (15) or by feet (16) of adjustable height; and by other lattice elements (7a), each bridge (2) platform (3) having a carrying structure including; at least a carrying framework (31) supporting a motor unit (4) and a braking unit (5) mounted in correspondence of each post (1); and end lattice elements (46) and intermediate lattice elements (47a, 47b) triangular in vertical cross section, said carrying structure also supporting a front and a rear parapet (149 and 150), each made of modular elements (56), at least the parapet (150) being mounted so as to be moved to and from the other parapet (149) so as to vary the width of the walk surface (148) of the br

Abstract: A scaffold structure comprising a tubular column positioned vertically in use by a base support for supporting a base end portion of the column. Top supporting structure supports a top end portion of the tubular column and is effective to maintain the column vertical in use. The base support and top support impart torsional rigidity to the tubular column. A positionable platform assembly having a platform for standing thereon is positionably mounted on the column for positioning the platform at a selected height above the base end of the column, and to permit adjustment of the height of the platform above the base end of the tubular column.

Abstract: A pin connection system supporting a causeway section from a pipe piling prising an elongated body member adapted for insertion through a pair of diametrically opposed openings in the pipe piling. One end of the body member having a guide tip rigidly affixed thereto and the other end having a retrieval shackle rotatably affixed thereto. A pair of safety stops are rigidly affixed to the underside of the pin for straddling the inside and outside diameter surfaces of the pipe piling adjacent one of the openings. A skid plate is inserted through the openings prior to the insertion of the pin thereby providing a guide for the pin insertion.

Abstract: A mobile work platform lift assembly is illustrated wherein a platform carriage is movable up and down by power operated cables on rails carried by a tower. The tower is movable from a horizontal to a vertical position. A safety mechanism is provided for locking the platform carriage with respect to the rails when the tower is in a vertical position if for any reason the cables no longer offer support for the carriage and when the tower is in a lowered horizontal position, the same mechanism fixes the platform carriage with respect to the rails to avoid longitudinal movement of the platform carriage with respect to the tower.