A portable davit includes a base having a mounting portion and a housing. The housing defines a cavity. An end of a mast is positioned within the cavity. A jib is coupled to another end of the mast. A connector is coupled to the jib. A hoist is coupled to a platform and includes a drive and a rope. An end of the rope is wound about the drive. Another end of the rope is coupled to the connector. The drive is configured to rotate relative to the platform in a first direction to decrease a distance between the platform and an end of the jib and to rotate relative to the platform in an opposite second direction to increase the distance between the platform and an end of the jib. Systems and methods of use are provided.

A portable davit includes a base having a mounting portion and a housing. The housing defines a cavity. An end of a mast is positioned within the cavity. A jib is coupled to another end of the mast. A connector is coupled to the jib. A hoist is coupled to a platform and includes a drive and a rope. An end of the rope is wound about the drive. Another end of the rope is coupled to the connector. The drive is configured to rotate relative to the platform in a first direction to decrease a distance between the platform and an end of the jib and to rotate relative to the platform in an opposite second direction to increase the distance between the platform and an end of the jib. Systems and methods of use are provided.

A foldable quad-chord truss which can be connected end-to-end with like trusses. The chords of each pair of chords are rigidly attached, and connector members intermediate the ends are each swivelly attached to each of the chords of each chord pair to effect the folding into a compact shape for transport and storage. The connector members are adapted for attachment to beams or connector members thereof which beams may extend between a parallel pair of the trusses.

A kit for erecting a platform. The kit comprises a plurality of quad-chord trusses. Each truss is attachable to others of the truss by eyelets on the ends of the chords. When the chords are spaced horizontally, the eyelet apertures are vertical for receiving pins, which allows a single pin to be inserted in eyelet apertures on one side of the truss so that one truss is swingable horizontally into position for rigid attachment end-to-end by inserting another pin in eyelet apertures on the other side of the truss. Each truss comprises a plurality of connector members for attachment to the trusses along their lengths. The kit further comprises a plurality of cross beams having connector members at their ends to mate with and attach to the truss connector members, and a plurality of tie-up mechanisms attachable to the trusses and to which a supporting line from an overhead structure is attachable. The cross beams have overhangs at their ends for overhanging the upper ones of the chords to allow ease of movement along the chords and attachment. A track lies between the chords of each truss to allow movement of bolts along the track into position for insertion into decking apertures for attachment of the decking. The trusses may be foldable for transport and storage.

A portable davit includes a base having a mounting portion and a housing. The housing defines a cavity. An end of a mast is positioned within the cavity. A jib is coupled to another end of the mast. A connector is coupled to the jib. A hoist is coupled to a platform and includes a drive and a rope. An end of the rope is wound about the drive. Another end of the rope is coupled to the connector. The drive is configured to rotate relative to the platform in a first direction to decrease a distance between the platform and an end of the jib and to rotate relative to the platform in an opposite second direction to increase the distance between the platform and an end of the jib. Systems and methods of use are provided.

An adjustable suspension assembly for suspending a lower structure such as a platform from an upper structure such as a portion of a bridge. A sling, which is attachable at one end to the upper structure, is attached at its other end to one end of a chain. A device, which is attachable to the lower structure, has a pair of aligned apertures in its side walls for receiving pins. The pins are spaced to receive a thickness of a chain link but not to receive a width of the link, whereby a selected link to achieve a desired lower structure height may be cinched between the pins. The other end of the sling, which comprises a cable, has an eyelet formed by folding an end portion of the cable back over the cable and swaging the cable end portion to the cable. The chain is attached to said eyelet by receiving the end portion of the cable in one of the chain links before the cable end portion is swaged to the cable.

An adjustable suspension assembly for suspending a lower structure such as a platform from an upper structure such as a portion of a bridge. A sling, which is attachable at one end to the upper structure, is attached at its other end to one end of a chain. A device, which is attachable to the lower structure, has a pair of aligned apertures in its side walls for receiving pins. The pins are spaced to receive a thickness of a chain link but not to receive a width of the link, whereby a selected link to achieve a desired lower structure height may be cinched between the pins. The other end of the sling, which comprises a cable, has an eyelet formed by folding an end portion of the cable back over the cable and swaging the cable end portion to the cable. The chain is attached to said eyelet by receiving the end portion of the cable in one of the chain links before the cable end portion is swaged to the cable.

Disclosed is a method for controlling cleaning at least a portion of a building facade (104a). A multi-dimensional map of a facade (104a) is cleaned from an elevator platform (200) of an elevator system is received. According to the map, an ordered sequence of instructions is determined. The instructions comprise robotic arm instructions and elevator platform instructions that are temporally intertwined to execute a cleaning pattern covering at least part of facade (104a). The robotic arm instructions are forwarded to control one or more robotic arms (206) and the elevator platform instructions are forwarded to control the elevation of the elevator platform (200). A corresponding device (221, 213) and non-transient memory (223), and a system having the device, are also disclosed.

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.

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.