A portable davit includes a base having a mounting portion and a housing coupled to the mounting portion. The housing include an inner surface defining a cavity. A hoist is positioned within the cavity. The hoist includes a drive and a rope. The rope includes opposite first and second ends. The first end of the rope is wound about the drive. A mast includes opposite first and second ends. The first end of the mast is positioned within the cavity. The mast includes an inner surface defining a passageway. A jib includes opposite first and second ends. The first end of the jib is coupled to the second end of the mast. The second end of the rope extends through an opening in the second end of the jib.

The shingle installation jack devices may be mounted once at a first roof level, providing support for the walk board. When installation or repair of the shingles is complete at the first level of the roof, the shingle installation jack devices may be operated in tandem to raise the level of the walk board to a second level of the roof. Shingle installation and/or repair may then be carried out at this second roof level without the need to re-mount the walk board supports at the second level. The shingle installation jack devices may also be run in reverse to lower the walk boards. The shingle installation device includes a frame and utilizes a winch motor to adjust the effective length of a cable and thus adjustably raise or lower the walk boards to any desired roof level.

A suspension work platform hoist system for raising and lowering a work platform is provided. The system incorporates at least one hoist attached to the work platform and in electrical communication with a hoist control system having a monitoring and diagnostic system to monitor and record at least one of a plurality of operating characteristics of the hoist. The hoist control system may further include a safety lock out system that requires authentication of an operator prior to the hoist control system causing movement of the hoist system.

The invention relates to a travel system for cylindrical and/or conical surfaces, in particular for the outer surface or the inner surface of a pipe or mast (1), having: an assembly platform (4a, 4b); a plurality of connected undercarriage elements (6), preferably identical undercarriage elements (6), which form a closed ring in a circumferential direction, in particular together with the assembly platform (4a, 4b) integrated between two undercarriage elements (6); a clamping system (7) which connects at least the undercarriage elements (6) to each other and with which the distance between the connected undercarriage elements (6) can be changed; at least one other undercarriage element (8) which is situated on the assembly platform (4a, 4b) at an axial distance from the ring of connected undercarriage elements (6); wherein at least the undercarriage elements (6) connected to the ring, preferably also the undercarriage element (8) axially spaced therefrom, are each in the form of a continuous track system. The invention also relates to a continuous track vehicle (11), in particular a 2-track continuous track vehicle (11), having at least one chain guided around two spaced deflection wheels (17), in particular deflection gears (17), running surface elements (20) being secured to the links (18) of the chain, wherein the running surface elements (20) each comprise rollers (21) for contacting a driving surface, the axes of rotation of the rollers being oriented in the direction in which the deflection wheels (17) are spaced or the running surface elements (20) being displaceable relative to the associated link (18) by at least one actuator (24).

Provided is a level-by level construction methodology integrating architectural and structural work for use in the construction of a multi-level building utilizing a movable protection system that can be mounted to a multi-level building during its construction.

The present invention provides an exterior wall maintenance apparatus. In certain embodiments, the exterior wall maintenance apparatus comprises a suspension means; and a suspended platform, where the suspended platform is physically coupled with the suspension means and the suspension means moves the suspended platform vertically and horizontally in parallel to an exterior wall of high rise buildings.

A plank scaffold system and, more particularly, to a ladder-based vertically-adjustable plank scaffold system. The system may have a pair of ladders, a wall standoff mounted at the top of each of the ladders, a crane support mounted at the top of each of the ladders, a vertical guide bar and roller system to keep it from swinging on the cables, and a horizontal platform suspended on cables below the crane supports, the platform having a pair of cable winches mounted thereon for varying the elevation of the platform. Instead of ladders, tower scaffolds or stage towers may be used on each side to support the vertically-adjustable plank.

The invention relates to a self-climbing system (10), in particular a self-climbing formwork system, comprising at least one climbing rail (12, 14) which is guided on at least two climbing shoes (16, 16, 16), in particular an upper and a lower climbing shoe, wherein the climbing shoes (16, 16, 16) can be fastened on and/or on top of a cured concreting section (18, 18, 18), and an actuator (20). The invention is characterized in that a circulating drive means is arranged along the climbing rail (12, 14), at least over a length portion (L) of the climbing rail (12, 14), can be moved relative to the climbing rail (12, 14) by means of the actuator (20) and can be selectively blocked or unlocked in the region of a climbing shoe (16, 16, 16) and/or in the climbing shoe (16, 16, 16) by means of at least one fixing device. Furthermore, the invention also relates to a method for operating a self-climbing system (10) according to the invention. The invention opens up an improved climbing principle for self-climbing systems (10) whereby, for example, continuous climbing becomes possible.

A self-climbing platform adapted to movably attach to, and hang from, a vertical structure for supporting a load with a cable connected to a main support connector comprising a retaining strap configured to surround at least a portion of the vertical structure, an adjustment lock attached to the retaining strap and a bracket. The bracket comprising an upper member connecting on one side to an adjustment bar and to a second side of a lower member to form a triangulated structure configured to a cantilevered position with respect to the vertical structure. The cable supporting the platform is connected to the bracket in a manner permitting transmission of the force required to support the self-climbing platform in a direction angled towards the vertical structure. The platform can rotate 360 around a tree or pole and can be used in forestry, civil or recreational fields.

A blade access arrangement for a rotor blade of a wind power plant having a tower, the arrangement including a platform, a tower guide for guiding the platform against the tower, a bar arrangement capable of being displaced in relation to the platform and connecting the platform with the tower guiding. The blade access arrangement including a hoisting arrangement for hoisting the blade access arrangement up and down, where the bar arrangement includes an extension beam connected to the bar arrangement via a hinge.