A connector for interlocking components of scaffolding or other supporting structures for building forms. The connector includes a body having an internal chamber bounded laterally by planar first and second surfaces. A lever is seated in the chamber laterally intermediate and in close fit with the planar first and second surfaces for inhibiting lateral movement of the lever. The lever is movable between a lock position and a release position. A spring is seated in the chamber laterally intermediate and in close fit with the planar first and second surfaces for inhibiting lateral movement of the spring, the spring for biasing the lever into the lock position.

A method and apparatus for assembling a hanging scaffold system within the aft pressure bulkhead area of an aircraft to provide access to the pressure dome without contacting the pressure dome. The hanging scaffold system comprises a group of horizontal supports to support at least one floorboard. A group of vertical supports is connected to and extends perpendicularly from the group of horizontal supports. A clamping device is attached to each vertical support of the group of vertical supports and further engages an attachment point on an internal structure of an aircraft.

A method and apparatus for assembling a hanging scaffold system within the aft pressure bulkhead area of an aircraft to provide access to the pressure dome without contacting the pressure dome. The hanging scaffold system comprises a group of horizontal supports to support at least one floorboard. A group of vertical supports is connected to and extends perpendicularly from the group of horizontal supports. A clamping device is attached to each vertical support of the group of vertical supports and further engages an attachment point on an internal structure of an aircraft.

A nut adapted to disengage with a threaded bolt, the nut comprising a base portion integrally formed to a top portion. The nut includes a bore positioned along a central axis through the base portion and the top portion, wherein the top portion is tapered between circumference of the base portion and the bore of the top portion. The tapering is at an angle between 0° to 45° relative to the diameter of the base portion; the base portion comprises at least two cavities, wherein the at least two cavities extend vertically into the base portion.

A scaffolding tube clamp having a pair of body portions defining a top and a base that are hinged together and receivable about a scaffolding tube. A rotatable bolt is received through a hole in the top a hole in the base portion. The bolt has a lower end with engagement means to releasably secure the bolt to the base. The bolt's head has a lower surface that is engageable with a surface on the top. The lower surface of the head, and the surface of the top that is engaged thereby, have complimentary ramped configurations such that when the bolt is rotated the ramps engage, resulting in the ramps moving the top toward the base. In an alternate embodiment the bolt is threaded with two sets of threads that have different diameters and different pitches and that are threadably received within the holes in the top and bottom.

A combined member, comprising a communication rod (1) and a connecting rod (2), wherein the connecting rod (2) comprises a rod body (2.1) and a connector (2.2), the connector (2.2) being a fastening connector (3) or a sleeving connector (4), the rod body (2.1) of the connecting rod (2.1) and a rod body of the communication rod (1) being of a strip-shaped structure, the connecting rod (2) being connected to the communication rod (1) by the fastening connector (3) or the sleeving connector (4), the axis of the connecting rod (2) intersecting that of the communication rod (1) connected thereto. The combined member has the advantages of high bearing capacity, and convenient construction.

A lock mechanism (10) for a scaffolding clamp or coupler (33) having a threaded rod (15) and a securing nut (14) is disclosed. The mechanism deters unauthorised removal of the securing nut and has a locknut (12) engageable with the threaded rod and having an unconventional drive mechanism (17). The mechanism also has a substantially cylindrical hollow sleeve (13) with a cylindrical interior dimensioned to surround the securing nut and locknut. The locknut has a main body with a tapered nose (21) able to bear against the securing nut and an annular recess (23). The sleeve interior has an inwardly projecting substantially annular flange (26) through which the nose can be forced to locate the flange in the recess and thereby retain the sleeve on the locknut. In addition, the sleeve has an exterior which is smooth and devoid of projections and recesses, and an axial length greater than the combined axial lengths of said securing nut and locknut, to thereby shield both the securing nut and the lock nut. A cup shaped shield (40) and cap (45) for masonry bolts (37) is also disclosed.

A lock mechanism (10) for a scaffolding clamp or coupler (33) having a threaded rod (15) and a securing nut (14) is disclosed. The mechanism deters unauthorised removal of the securing nut and has a locknut (12) engageable with the threaded rod and having an unconventional drive mechanism (17). The mechanism also has a substantially cylindrical hollow sleeve (13) with a cylindrical interior dimensioned to surround the securing nut and locknut. The locknut has a main body with a tapered nose (21) able to bear against the securing nut and an annular recess (23). The sleeve interior has an inwardly projecting substantially annular flange (26) through which the nose can be forced to locate the flange in the recess and thereby retain the sleeve on the locknut. In addition, the sleeve has an exterior which is smooth and devoid of projections and recesses, and an axial length greater than the combined axial lengths of said securing nut and locknut, to thereby shield both the securing nut and the lock nut. A cup shaped shield (40) and cap (45) for masonry bolts (37) is also disclosed.

One cylindrical pipe is inserted into the hollow cylindrical portions of first and second holders made of hard plastic, and the other cylindrical pipe is inserted into the hollow semi-cylindrical portions. The first and second pipe holders are butted together at butt surfaces, respectively. The cylindrical pipe inserted into the butted hollow cylindrical portions is held in the hollow cylindrical portions using a clamping tool, and the cylindrical pipe inserted into a cylindrical portion that becomes hollow cylindrical by butting is held in the hollow semi-cylindrical portions using the clamping tool.

One cylindrical pipe is inserted into the hollow cylindrical portions of first and second holders made of hard plastic, and the other cylindrical pipe is inserted into the hollow semi-cylindrical portions. The first and second pipe holders are butted together at butt surfaces, respectively. The cylindrical pipe inserted into the butted hollow cylindrical portions is held in the hollow cylindrical portions using a clamping tool, and the cylindrical pipe inserted into a cylindrical portion that becomes hollow cylindrical by butting is held in the hollow semi-cylindrical portions using the clamping tool.