Abstract: A modular subbase may comprise an upper surface, a longitudinal supporting structure coupled to the upper surface, one or more outrigger boxes coupled to the longitudinal supporting structure and the upper surface. The longitudinal supporting structure may comprise a wide sheet of metal comprising two upwardly-facing arms and a medial section adapted to be lightweight and to provide structural support to the upper surface. The longitudinal supporting structure and upper surface may comprise struts configured to prevent buckling of the medial section and the upper surface The modular subbase may be configured to couple to one or more modular bodies. The modular bodies may couple directly to the upper surface. A boom-arm pedestal for operating a boom-arm may be integrated into the upper surface and may be structurally supported by the modular subbase.

Abstract: A work implement for a work vehicle includes a boom having a chassis attachment end and an arm attachment end, an arm including a boom attachment end and a tool attachment end, and a work tool coupled to the tool attachment end of the arm. The boom attachment end is pivotally coupled to the arm attachment end of the boom. At least one of the boom and the arm includes a first portion and a second portion movably coupled to the first portion between a first orientation with respect to the first portion and a second orientation with respect to the first portion. At least one fastener is coupled between the first and second portions to selectively secure the second portion in the first orientation and the second orientation with respect to the first portion.

Abstract: A vehicle crane having a superstructure with a jib system including a main jib mounted in a luffable manner on the superstructure, with a jib head and a luffable additional jib and at least one luffing support supported in the region of a luffing axis of the additional jib. At least one guying support of the jib system is arranged in such a manner that a tensioner starting on the one hand from the superstructure and/or from a counterweight and connected on the other hand to the additional jib is guided via the at least one guying support and the at least one luffing support. A main jib extension is incorporated between the jib head and the additional jib with the at least one guying support supported at the main jib extension to obtain a longer design of the jib system with the highest possible permissible bearing load.

Abstract: This invention relates to a large crane with an at least two-part main boom, wherein a lower and an upper part of the main boom are pivotally coupled to each other an articulation point. The invention furthermore is directed to a method for erecting or depositing a corresponding large crane.

Abstract: A self-erecting crane includes a mast supporting a foldable jib having jib elements articulated together, configurable between a transport configuration and a work configuration. The crane also includes a motor-driven folding/unfolding system for performing configuration change operations implementing kinematics of folding and unfolding the jib, and a control/command system connected to the motor-driven folding/unfolding system to drive it. One or several inclinometer(s) are mounted on one or several jib element(s) to measure actual inclinations of the jib element(s) with respect to a reference axis. The control/command system is configured to drive the motor-driven folding/unfolding system according to the actual inclinations of the jib element(s) during the kinematics of folding and unfolding the jib.

Abstract: A vehicle crane, such as a mobile crane or a crawler crane, includes a main boom, a main boom extension, and an adapter that is located between the main boom and the main boom extension and which has a first connection plane and a second connection plane. The adapter is configured to be movable such that the first connection plane can be moved relative to the second connection plane, where the adapter is designed in the manner of a double lever in order to provide a vehicle crane that has improved load-bearing capacity and simplified set-up.

Abstract: A hinge system is provided for a boom of an agricultural product applicator that facilitates a compact folded boom width in a transport mode by providing a multi-directional folding, including folding with compound movement components to reorient a primarily horizontal stack of boom sections to a primarily vertical stack of the boom sections, when fully folded. The hinge system may include multiple hinge joints with pivot axes that are oriented at different angles to allow for substantially horizontal folding movements followed by a rolling-type movement(s) that reorients a generally horizontal stack of boom sections into a generally vertical stack of boom sections to decrease an overall width of the applicator when in transport mode.

Abstract: A vehicle crane, such as a mobile crane, includes a main jib and a main jib extension that is mounted thereon and can be luffed by at least one luffing cable. The vehicle crane includes at least one anchoring support that is arranged on the main jib and guides the luffing cable in order to anchor the main jib to provided improved load-bearing capacity.

Abstract: An intermediate support holder includes right and left guy line retaining units, right and left intermediate support line retaining units, and a connecting unit. The intermediate portions of the guy lines can be attached to the guy line retaining units. The intermediate support line retaining units are disposed so as to be aligned in the right-left direction with respect to the guy line retaining units, and base end portions of the intermediate support lines can be attached to the intermediate support line retaining units. The connecting unit couples and fixes the pair of right and left guy line retaining units and the pair of right and left intermediate support line retaining units to each other.

Abstract: The present disclosure discloses an operating method of a wind power jib of a crane and a crane, and relates to the field of engineering machinery. The method includes the following steps: rotatably connecting a main boom and a wind power jib; overturning the wind power jib to a first preset position by using a traction means of the crane; contacting a cushioning member with the wind power jib provided at the first preset position; further drawing the wind power jib to overturn to a second preset position; releasing the traction means, such that the wind power jib overturns automatically under the effect of self gravity and a cushioning member until the wind power jib is overturned in position.

Abstract: Provided is a crane with a main boom and a back mast, of which at least one comprises a first mast upper part comprising at least one mast section and a first mast lower part comprising at least one mast section, and a first mast tilting. The first mast tilting member is arranged between the first mast upper part and the first mast lower part, and has a straight hoisting state wherein the first mast upper part and the first mast lower part are essentially in line with each other, and a tilted hoisting state wherein the first mast upper part is tilted with respect to the first mast lower part.

Abstract: A protective device to prevent persons from falling has a base and an anchor mast system in connection with the base. On a free upper end of the anchor mast system, personal protective equipment (PPE) is fastened at an anchor point. To increase stability, the anchor mast system is provided with a lower standing section and a cantilever section. The standing section and the cantilever section are pivoted by a pivot drive relative to each other and relative to the base such that the anchor point in connection with the PPE is displaced downwards and away from the tilting edge of the base. This reduces the total height of the protective device, and increases the stability in the event of load in the region of the anchor point, while the weight of the protective device, particular also of the base, is reduced.

Abstract: Disclosed is a technique of executing: a fixing step of coupling a pulling-raising rope 171 to a vicinity of a distal end 73 of a strut 70; a first raising step of pulling the pulling-raising rope 171 rearwardly to cause a swingable portion 78 of the strut 70 to swing upwardly and rearwardly; a second raising step of pulling the pulling-raising rope 171 rearwardly until a strut body portion 76 has a rearwardly inclined posture with respect to a vertical direction; a strut returning step of pulling a pulling-returning rope 23a forwardly to a position where a forward swinging movement of the swingable portion 78 with respect to the strut body portion 76 is restricted; and a coupling step of coupling the swingable portion 78 and the strut body portion 76 to each other in a non-swingable manner.

Abstract: The overhanging storage mechanism for a jib is provided with: a guide roller (31) provided to a jib (15); a guide (32) provided to a base end boom (14a); a jib-fixing pin (43) provided to the base end boom (14a); and a pin socket (45) that is provided to the jib (15) and that comprises insertion holes (48), (49). The jib-fixing pin (43) and the insertion holes (48), (49) are arranged so that the jib-fixing pin (43) is inserted in the insertion hole (48) when the jib (15) moves along the base end boom (14a) together with contraction of a boom (14). The inner dimensions of a front end opening (48) are larger than the outer dimensions of the jib-fixing pin (43). It is thus possible to absorb positional displacement between the jib-fixing pin (43) and the insertion hole (48).

Abstract: Provided is a jib connection structure for restraining a projectable/retractable jib from swinging sideways in a state where the jib is suspended from a boom tip end part, the jib connection structure including: jib connection shafts projecting horizontally toward both sides from a boom tip end part; and jib base end engagement parts respectively provided to bifurcated jib base end parts. Each jib base end engagement part is U-shaped into which the jib connection shaft can be fitted, and is provided with an insertion hole into which a pin for preventing the jib connection shaft from slipping out is inserted. The insertion hole in one jib base end engagement part is arranged more toward the outside than a U-shaped bottom part. When a jib is suspended from the boom tip end part, the left and right pins engage with the respective jib connection shafts, and the jib is suspended at two points.

Abstract: An intermediate suspension connection column segment designed for use in constructing a column which is supported by a suspension that includes a first end having a first connection configured to connect to a first adjacent column segment; a second end opposite the first end, the second end having a second connection configured to connect to a second adjacent column segment; and an intermediate suspension connection between the first connection and the second connection, the intermediate suspension connection configured to couple an intermediate suspension between the suspension and the column.

Abstract: A fluid turbine comprises a rotor rotatable in use about an axis transverse to the direction of fluid flow, the rotor having a first part carrying a plurality of arcuate blades that may be arranged selectably in compact straight shapes or in arcuate shapes and a second part journalled in a base structure by two or more bearings. Another aspect of the invention discloses an installation frame, devised to support the turbine or other elongated structures in a folded arrangement for transportation on a trailer, and to support assembly and erection thereof.

Abstract: A pin puller is mounted between first and second connectors, preferably connectors on a lift crane, each of the connectors having a hole there though. The pin puller includes: a) first and second support frame members; b) a first pin with a first end located in the hole of the first connector and a second end inside the first support frame member; c) a second pin with a first end located in the hole of the second connector and a second end inside the second support frame member; d) at least one linear actuator connected to the first and second pins; and e) a length adjustment device between the first and second support frame members, with its length adjusted so as to force the first support frame member into contact with the first connector and the second support frame member into contact with the second connector.

Abstract: A jib attachment/detachment mechanism to mount a jib on a boom head includes a guide mechanism including a guide roller and a guide support configured to guide engaging portions of a jib support to positions of engagement with shaft pins of a boom head when the jib support is pulled up with a wire by using a winch and to prevent change of a state of the wire pulled up by the winch when the jib support is rotated around the shaft pins by contracting a cylinder.

Abstract: The invention relates to a method of raising a telescopic boom of a mobile crane having a luffing fly jib and having a spatial boom guying. To be able to raise particularly long luffing fly jib systems together with the telescopic boom here, in accordance with the invention the telescopic boom is first telescoped outwardly to its desired length. In this position, all the telescopic sections are bolted to one another and the spatial guying is tensioned before the raising of the luffing fly jib pivotally connected to the telescopic boom.

Abstract: This invention relates to a method for erecting a main boom of a truck crane, which at least consists of a telescopic boom, with a fly jib which is braced via bracing trestles and bracing rods, and with a spatial boom bracing. In accordance with the invention, the main boom is braced by means of the spatial bracing before being completely connected with the fly jib.

Abstract: A trash receptacle securing system is provided and comprises a trash receptacle having an open top and a closed bottom. At least one aperture is formed in the closed bottom of the trash receptacle. A weighted mounting base is provided having a top surface and a bottom surface. At least one nub is formed on the top surface of the weighted mounting base with the nub receivable within the at least one aperture and releasably contactable with the closed bottom of the trash receptacle. A foot release pedal moves the at least one nub in a generally outward direction within the at least one aperture and out of contact with the closed bottom of the trash receptacle. Upon activation of the foot release pedal, the trash receptacle is separable from the weighted mounting base.

Abstract: A method of connecting sections of a crane suspension assembly together includes attaching a frame to a member of a first section; connecting a tension member between the frame and a connector used in the assembly; moving the tension member so that the connector pivots about a pin to a position where a second hole in the connector is in alignment with a hole in a second section member; putting a second pin through the hole in the connector and the hole through the second section member; and disconnecting the tension member from the connector. The method may also include attaching a frame with a winch to a section of the crane suspension assembly; connecting a line from the winch to the connector; activating the winch to move the connector so that it pivots about a pivot axis; and securing the connector in its second position.

Abstract: A connector for a column segment, such as a boom segment, of a crane includes n extensions, where n is a positive integer. Each extension has a first base and an aperture extends through the extension from a first side to a second side. The first connector also includes at least (n+y) plates, where y is selected from the group consisting of (?1, +1) such that the sum of (n+y) is a positive integer. The plate or plates are positioned in and coupled to the extensions in an alternating arrangement. Each plate includes a plate base aligned substantially in a plane with the first base of the extension to form a first connector mounting surface. A plurality of welds couple the plates to the extensions and the fabricated connector is then welded to the column segment. At least one extension is formed of steel having a grain structure elongated in a direction of rolling that is substantially perpendicular to the first base.

Abstract: A vehicle crane—in particular an articulated-arm crane—includes a lifting arm and one or more articulated arms, and the geometry of the crane arms can be changed with respect to one another. A load cable can be guided or is guided on the crane arms. A compensation device allows the tension in the load cable to be controlled or regulated upon a change in the geometry of the crane arms with respect to one another.

Abstract: An improved knuckle boom crane apparatus provides a supportive base with an attached frame including a cabin with an interior. A prime mover is supported upon the frame. A main boom is pivotally attached to the frame at a first boom end portion, the main boom having a second end portion. A jib boom is provided having first and second end portions, the jib boom first end portion being pivotally attached to the main boom second end portion, the jib boom second end portion being free. A main block is attached to the main boom, depending from the main boom second end portion. An auxiliary block is attached to the jib boom, depending from the jib boom second end portion. A main block parking area is provided next to the connection of main boom and jib boom that enables the main block to be parked when using the auxiliary block.

Abstract: A crane includes: a boom; a jib that is provided on a leading end side of the boom; and a strut that is provided at one or both of a leading end portion of the boom and a base end portion of the jib, and to which a jib support pendant is connected, the strut, to which the pendant is connected, being provided with strut rotationally moving means having: a first bar-like member rotationally connected, at a first end portion thereof on one side, to a leading end portion of the strut on an opposite side thereof to a side, on which the pendant is connected; and a direct acting apparatus that applies, to the first bar-like member, a force pulling the first bar-like member toward the other side along a longitudinal direction of the first bar-like member.

Abstract: A crane includes first and second column segments. At least a first, third and fifth connector are located on the first segment, respectively mating with at least a second, fourth and sixth connector on the second segment. Each of the connectors includes at least a first extension having a through-hole positioned in the extension such that the through-holes of mating connectors are aligned when the column segments are aligned. A first pin fits tightly through the through-hole of the first extension on the first connector and the through-hole of the first extension on the second connector to hold the first and second connectors together. A second pin fits loosely through the through-hole of the first extension on the third connector and the through-hole of the first extension on the fourth connector to hold the second and fourth connectors together. The connectors also include a compressive load bearing surface.

Abstract: A jib for a crane is foldable between an operation arrangement and a transportation arrangement. In the operation arrangement a first jib element and a second jib element are coaxially arranged with respect to a longitudinal axis of the unfolded jib. In the transportation arrangement the jib is folded such that the first jib element axis and the second jib element axis are arranged parallel and spaced apart with respect to each other. A first hinge axis of a jib connecting unit and a second hinge axis of the jib connecting unit are oriented transversally with respect to a first jib connecting axis and to a second jib connecting axis, respectively.

Abstract: A lift crane includes a carbody; ground engaging members elevating the carbody off the ground; a rotating bed rotatably connected to the carbody; a boom pivotally mounted at a first end to the rotating bed with a load hoist line extending adjacent a second end of the boom; a boom hoist mechanism that can be used to change the angle of the boom relative to the rotating bed during crane operation; and a boom raising assist structure connected to the boom. The boom raising assist structure preferably includes at least one ground engaging member in contact with the ground; and a boom elevating member extending between the assist structure ground engaging member and the boom. The boom elevating member supports at least a part of the weight of the boom.

Abstract: Method for adjusting the angle of a jib system of a crane, comprising the steps of providing two jib units of the jib system, which can be variably arranged with respect to their longitudinal axes in an angle position in relation to one another, arranging connecting links attached to the jib units in such a way that the longitudinal axes of the jib units are parallel in a starting angle position, starting openings and target openings of the connecting links are aligned with one another pairwise to insert a connecting element connecting the jib units, the aligned starting openings being connected with the connecting element, relieving the connecting element connecting the aligned starting openings, removing the first connecting element, connecting a pair of the aligned target openings with the connecting element, and arranging the jib units in a target angle position which is different from the starting angle position.

Abstract: A hybrid trailer with a built in retractable hydraulic crane to handle different configurations of platform surface bodies. It will raise the platform surface body vertically away from the chassis frame placing the platform surface body in the desired location. Two telescoping arms extend out to lift and retract into a recessed area in the bed of the trailer for storage. It is operated by remote voice control. A solar collector enables operation in remote locations and use of the crane for external lifting operations.

Abstract: A crane, in particular a vehicle crane, includes a first crane arm and at least one second crane arm which are connected together by a joint. The crane arms are pivotable relative to each other by a drive having a piston-cylinder unit, in each case starting from one of the two end positions in which the crane arms are in substantially mutually parallel relationship until reaching a dead point when the longitudinal axis of the piston-cylinder unit is substantially on a line with the joint. There is provided at least one second drive by which it is possible to go beyond the dead point position of the piston-cylinder unit relative to the joint.

Abstract: The danger of a jib falling off a boom due to an erroneous operation during movement of the jib between a stowage position and an extended position is eliminated. The jib is provided with a pivot pin insertion state detector, pivot pin retraction blocking element, a coupling pin insertion state detector, first and second cables, wherein movement of a coupling pin to a retracted position is restricted by a coupling pin retraction blocking element via the first cable when the pivot pin insertion state detector has detected that the pivot pin is retracted, and movement of the pivot pin to the retracted is restricted by the pivot pin retraction blocking element via the second cable when the coupling pin insertion state detector has detected that the coupling pin is retracted, so that simultaneous removal of both of the pivot pin and the coupling pin is prevented.

Abstract: An element is provided for connecting the chords of a lattice system, which consists of upper chords and lower chords, between which struts and/or stays are arranged, to a telescopic boom head. Thereby, the lower chords are directly connected to the telescopic boom head by means of bolts, while the upper chords can be connected to the telescopic boom head by a connecting element of variable length in such a way that—with respect to the connection of the lower chords—the upper chords can be connected to one another at a variable angle, and wherein the connecting element consists of two butt straps which can each be fastened at one end of mutually facing ends of the upper chords and can be connected to one another at different points.

Abstract: An improved knuckle boom crane apparatus provides a supportive base with an attached frame including a cabin with an interior. A prime mover is supported upon the frame. A main boom is pivotally attached to the frame at a first boom end portion, the main boom having a second end portion. A jib boom is provided having first and second end portions, the jib boom first end portion being pivotally attached to the main boom second end portion, the jib boom second end portion being free. A main block is attached to the main boom, depending from the main boom second end portion. An auxiliary block is attached to the jib boom, depending from the jib boom second end portion. A main block parking area is provided next to the connection of main boom and jib boom that enables the main block to be parked when using the auxiliary block.

Abstract: This invention relates to a lattice mast crane with a lattice mast boom to be luffed up in a vertical luffing plane, which comprises a pivot piece, a plurality of lattice pieces releasably connectable with each other, and a head piece. In accordance with the invention, the lattice mast boom includes a first and a second region, wherein in the first region the lattice mast boom includes at least two first strands of interconnected first lattice pieces extending in parallel in longitudinal direction of the boom, which are connected with the pivot piece via a lower cross-beam and with the head piece via an upper cross-beam, and wherein in the second region the lattice mast boom only consists of a second strand of interconnected second lattice pieces.

Abstract: An articulated jib for moving a load is supported on a base and comprises a first jib arm pivotably connected to a base. The first jib arm functions as a bascule and is pivotable about a first axis. There is a first counterweight disposed on the first jib arm. A second jib arm is pivotably connected to the first jib arm and is pivotable about a second axis. A linking rod connects the second jib arm to a lever arm which is also pivotably connected to the base. There is a second counterweight disposed on the lever arm.

Abstract: A truck mounted telescopic boom structure including a stowable jib boom having a stowable personnel basket mounted thereon is described. A mounting structure is provided at the outer end of the innermost boom section of the boom structure and includes means for pivotally moving a work platform or basket between operative and stowed positions. When the boom structure and the jib boom are in their stowed positions, the personnel basket is positioned closely adjacent the jib boom at one side thereof so as to be within the highway width restrictions. The instant invention enables the personnel basket to be connected to the outer end of the jib boom at all times without the necessity of removing the personnel basket from the jib boom when the jib boom and the boom structure are in their stowed positions.

Abstract: A payload lifter/manipulator module includes a rotatable joint supporting spreader arms angularly spaced with respect to one another. A rigid arm is fixedly coupled to the joint and extends out therefrom to a tip. A tension arm has a first end and a second end with the first end being fixedly coupled to the tip of the rigid arm. The tension arm incorporates pivots along the length thereof. Each pivot can be engaged by or disengaged from the outboard end of a spreader arm based on a position of the spreader arm. A hoist, positioned remotely with respect to the module and coupled to the second end of the tension arm, controls the position of the spreader arms to thereby control the position of the rigid arm's tip. Payload lifter/manipulator assemblies can be constructed with one or more of the modules.

Abstract: A mobile crane includes a boom extension assembly carried alongside a telescoping boom assembly in a stowed position. The boom extension assembly includes a fly section with a first portion adapted for being connected to the head end of the boom assembly in an operative position while a second portion of the fly section adapted for being connected to the first portion remains in the stowed position. The first portion of the fly section may: (1) be shorter in length than the corresponding second portion of the fly section; (2) include sheaves for supporting a hoist line; (3) include a tapered end; or (4) be used in combination with two additional sections of the boom extension assembly. A related method includes connecting a first, shorter portion of a fly section to a head end of a telescoping boom assembly while a second portion remains in a stowed position.

Abstract: An arm made of composite material, and relative production method, consisting of a plurality of articulated segments with a longitudinal main axis (x), pivoted to each other, each of the articulated segments comprising a box-like structure and at least a joint element attached thereto by means of gluing, the box-like structure having an end cooperating with an end of the joint element on the inside of the surface of the joint element. The ends define a substantially conical reciprocally overlapping area and have profiles concordantly inclined by an angle (?) with respect to the longitudinal axis (x).

Abstract: A device for installing the lower and upper jib support of an adjustable auxiliary boom. The device includes a setup frame which is connected to the lower jib support a tie rod section one end of which can be connected to the hoist cable of the main hoisting gear whereas the other end is hinged to the top of the lower jib support and a tensile member section between the lower jib support and the upper jib support.

Abstract: The invention relates to a crane jib for a crane, having a longitudinal axis and an imaginary contour line that extends in a transversal plane relative to an axis of symmetry in an at least approximately mirror-symmetric manner, the contour line having an at least approximately arcuate section between a center that is equally interspaced from the first and second point of intersection on the axis of symmetry and the first point of intersection, a first straight section being tangentially contiguous thereto in the direction of the second point of intersection, the imaginary extension of which first straight section in the direction of the second point of intersection intersects the axis of symmetry and forms an acute angle therewith.

Abstract: A vehicle equipped with a lifting arm assembly includes a chassis structure with a cabin and a lifting arm assembly fastened on top of the chassis structure so that it turns around a vertical rotating by a rotating base. For folding, the lifting arm assembly is positioned behind the cabin in two positions. In a rescue vehicle the lifting arm assembly also includes at least an arm that can be outstretched to a standby position on top of the cabin. A third arm is fastened to a second arm to rotate in the vertical direction so that in the transport position of the lifting arm assembly the third arm can be turned under the second arm or next to it, and the rotating base is also positioned under the central part of the second arm when the lifting arm assembly is in the transport position.

Abstract: This invention relates to a lattice mast crane with a lattice mast boom to be luffed up in a vertical luffing plane, which comprises a pivot piece, a plurality of lattice pieces releasably connectable with each other, and a head piece. In accordance with the invention, the lattice mast boom includes a first and a second region, wherein in the first region the lattice mast boom includes at least two first strands of interconnected first lattice pieces extending in parallel in longitudinal direction of the boom, which are connected with the pivot piece via a lower cross-beam and with the head piece via an upper cross-beam, and wherein in the second region the lattice mast boom only consists of a second strand of interconnected second lattice pieces.

Abstract: A crane includes a boom and boom pivoting mast connected to a swivel body so as to be pivotable, a boom pivoting winch for pivoting the boom, and a main hoisting winch and auxiliary hoisting winch for hoisting up and hoisting down a hanging load. The main and auxiliary hoisting winches are mounted on the boom, while the boom pivoting winch is mounted on the boom pivoting mast.

Abstract: This invention relates to a method for erecting a main boom of a truck crane, which at least consists of a telescopic boom, with a fly jib which is braced via bracing trestles and bracing rods, and with a spatial boom bracing. In accordance with the invention, the main boom is braced by means of the spatial bracing before being completely connected with the fly jib.

Abstract: The invention relates to a harvester crane, which includes a set of booms, which are attached by means of a pedestal and rotating device to a chassis machine, in which the set of booms includes a main boom, which is pivoted at its lower end by a lower pivot to the pedestal; and an articulated boom, which is pivoted by an upper pivot to the opposite end of the main boom and which extends its path mainly forward from the main boom; operating devices, i.e. a lift device and a transfer device, operating the booms. The lower pivot of the main boom is located low down near to the rotating device and the pedestal is fork-shaped, the lower arm and the lift cylinder being located at least partly inside it.

Abstract: The present invention relates to a crane boom, in particular a telescopic boom of a mobile crane, comprising a boom guying which has at least one guy rope which is guided from an inner articulation point in the region of a boom articulation point to an outer articulation point in the region of a projecting boom part. In accordance with the invention, the guy rope is articulated at its outer end such that the guy rope force induces a bending moment in the crane boom which counters the sagging of the crane boom. This can be achieved in that the guy rope is articulated eccentrically from the boom part. In accordance with the invention, the outer articulation point of the guy rope is arranged spaced apart from the boom part at an articulation jib which is secured to the boom part such that a tensile force of the guy rope induces a bending moment into the crane boom via the articulation jib, said bending moment reducing the bending moment generated in the boom by a hook load and the boom's own weight.