Abstract: A lift drive for a rail-guided cantilever construction device. The cantilever construction device comprises a main frame guided by at least one rail for receiving at least one formwork. The lift drive comprises a lift device, a first end of the lift device is designed to be connected to the main frame, and a second lift device end opposite the first end can be moved relative to the main frame when the first end of the lift device is connected to the main frame; a first fixing device connected to the first end of the lift device and designed to fix the first end of the lift device with respect to the at least one rail; and a second fixing device connected to the second end of the lift device and designed to fix the second end of the lift device with respect to the at least one rail.

Abstract: A climbing device is proposed having at least one climbing rail for adjusting and/or climbing a scaffolding and/or a formwork and/or a platform, at least one climbing shoe being arranged on the climbing rail, at least one hydraulic cylinder comprising at least one drive piston, arranged in a cylinder housing, and having a hydraulic fluid being provided for raising the climbing shoe and/or the climbing rail and/or the scaffolding and/or the formwork and/or the platform, which at least partially avoids or at least reduces the disadvantages of the prior art. According to the invention this is achieved in that the hydraulic cylinder is embodied as a hydraulic unit, the hydraulic unit comprising at least one hydraulic tank for storing hydraulic fluid, an electric motor and a hydraulic pump driven by the electric motor for pressurizing the hydraulic fluid.

Abstract: A bracket attachable to a top side of a parapet on a bridge to support a platform positioned on a horizontal element of the bracket. Vertical adjustment of the bracket allows the horizontal element to be positioned a small distance beneath the bridge deck so that the platform positioned thereon can catch falling materials, such as from demolition during bridge repair. After demolition, vertical adjustment of the bracket brings the horizontal element supporting the platform to a level directly under the bridge deck for use as a formwork for construction of a new roadway.

Abstract: A building assembly system for fabricating a multi-story building is described, wherein the building includes a vertical support core arranged on a base. Lift jacks are arranged between a top portion and a bottom portion of the vertical support core, and a reusable bridle is suspended from the plurality of lift jacks and slidably arranged on the vertical support core. A floor plate is assembled onto the bridle at an assembly level that is proximal to the base. The plurality of the lift jacks are operable to lift the bridle and the assembled floor plate to a design elevation on the vertical support core, and are operable to lower the bridle to the assembly level on the vertical support core after the floor plate has been secured to the vertical support core at the design elevation.

Abstract: Calcium silicate-based cements and concretes are disclosed, which result in concrete compositions that have an improved strength development. A cement product includes a plurality of particles of a carbonatable calcium silicate cement and a first additive; wherein, the first additive is an organic molecule with at least one primary, secondary or tertiary amine group.

Abstract: A formwork and method for casting a concrete structure comprising: a first form element for delimiting a cavity to receive concrete, the first form element having an upper end and a lower end, a first tilt sensor for measuring an actual tilt of the first form element, the first tilt sensor further comprising a first sensor element for measuring the inclination of a lower region of the first longitudinal element and a second sensor element for measuring the inclination of an upper region of the first longitudinal element, and determining a deviation between the inclination of the lower region of the first longitudinal element and the upper region of the first longitudinal element.

Abstract: A slip form assembly includes a lifting pole extending in a longitudinal direction and an inner form slidably coupled to the lifting pole and extending in a lengthwise direction perpendicular to the longitudinal direction between a first end and a second end. The first end is configured for end-to-end contact with an adjacent end of an adjacent inner form. An outer form is slidably coupled to the lifting pole opposite the inner form and defines a cavity for casting a portion of a wall therebetween. The outer form extends parallel to the inner form between a first end and a second end. The first end of the outer form is configured for end-to-end contact with an adjacent end of an adjacent outer form. The inner form and outer form are moveable along the lifting pole longitudinally relative to the respective ends of the adjacent inner form and outer form.

Abstract: A rebar chair with a gravel particle affixed to each distal tip of the chair for providing a concealing offset between each distal tip and a support surface.

Abstract: A seal for a lead-through for a tie rod through a panel formwork element. The seal includes a sleeve, a sealing element and a sliding tube, which are disposed on the tie rod and, together with the tie rod, are placed through the panel formwork element from a rear side, so that the sealing element exits the panel formwork element on a front side and, after brief pulling back of the tie rod, provides sealing between the sleeve and the panel formwork element, for one-sided anchoring.

Abstract: A bracket scaffold for arrangement on a curved surface of a structure includes a first securing element arranged on the structure. The bracket scaffold has an end-side first coupling element which is, in particular in a limited manner, pivotably arranged on a first carrier of the bracket scaffold. A rotation axis of the first coupling element preferably intersects with the support location of the first coupling element on the first securing element. The pivot radius of the first coupling element describes in particular a concave pivot arc on the first carrier. The rotation axis is located from the first guide preferably in the direction of the free end of the first coupling element. Extension torques in the articulation, which is formed by the first guide, are minimized by the bracket scaffold being pulled away from the structure.

Abstract: The scaffold securing clip and strap comprises a ratchet strap, a scaffolding jib and a bracket. The scaffold securing clip and strap is configured for use with a stanchion. The ratchet strap attaches the scaffolding jib to the stanchion. The bracket attaches the scaffolding jib to the stanchion. A first instantiation of the scaffold securing clip and strap works in conjunction with a second instantiation of the scaffold securing clip and strap to support one or more planks. Specifically, the scaffolding jib of the first instantiation and the scaffolding jib of the second instantiation combine to raise one or more planks to an elevation above a supporting surface of the stanchions to which the first instantiation and the second instantiation are attached. The elevated one or more planks form a raised horizontal surface capable of supporting a load.

Abstract: A method of constructing a building includes attaching a first portion of a roof structure to the yokes of a vertical slip form system. A derrick crane is positioned on top of the first portion of the roof structure. A vertical support core of the building is then formed with the vertical slip form system. The first portion of the roof structure and the derrick crane are raised with the vertical slip form system. The vertical slip form system is removed from the formed vertical support core of the building, and the first portion of the roof structure is then moved into a final position and attached to the vertical support core. The remainder of the roof structure and subsequent floor plates may then be constructed at ground elevation, raised into place, and attached to the vertical support core in a top-down, descending order.

Abstract: A cast-in-place anchor and method of securing it to a wooden form board. Such cast-in-place anchors include a body defining a cavity and having a base for positioning the body on a wooden form board. The body being securable to the wooden form board by at least one fixing member. An opening is disposed in the base in communication with the cavity and a plurality of additional openings are in the body in communication with the cavity. A threaded member is provided in the cavity. A support member is also provided in the cavity for supporting the threaded member and for restricting the ingress of wet concrete through the additional openings into contact with the threaded member in use. The anchor is configured such that after concrete pouring, concrete setting, and form board removal, a threaded rod can be inserted into the opening in the base of the body.

Abstract: A tie rod puller including a pull housing, a clutch assembly and a clutch assembly housing is disclosed. The tie rod puller accelerates the process of pulling tie rods and installing key plates. The pulling of tie rods better secures the panels of a structure under construction to improve the integrity of a structure. The clutch assembly movably rotates a nut as a tie rod is being installed. The clutch assembly includes a stopper to prevent the nut from moving too far back. The clutch assembly is to hold and move a tie rod upon pulling of the tie rod and installing a key plate onto a wall. The clutch assembly housing includes a plate, which receives a key plate with a magnet. The plate includes brackets to stabilize the tie rod puller. The tie rod puller is preferably operated by automatic means such as by an impact drill.

Abstract: The composite material is comprised of a substrate of discrete particles and a network of interconnected mycelia cells bonding the discrete particles together. The composite material is made by inoculating a substrate of discrete particles and a nutrient material with a preselected fungus. The fungus digests the nutrient material over a period of time sufficient to grow hyphae and to allow the hyphae to form a network of interconnected mycelia cells through and around the discrete particles thereby bonding the discrete particles together to form a self-supporting composite material.

Abstract: A stay-in-place footing form assembly includes a plurality of inner form boards serially aligned and joined by inner joining brackets, a plurality of outer form boards serially aligned and joined by outer joining brackets, a plurality of lower spacing rails, each disposed between and connecting base brackets in the inner and outer joining brackets aligned laterally, and a plurality of upper spacing rails, each disposed between and connecting top brackets in the inner and outer joining brackets aligned laterally. The lower spacing rails include first rebar receptacle(s) for seating horizontal rebars on the rails, and the upper spacing rails include second rebar receptacle(s) for holding vertical dowel rebars therein. The inner and outer form boards are insulation boards that have an ability of absorbing lateral forces of earthquakes exerted to a concrete footing formed in the stay-in-place footing form, and an ability of insulating the concrete footing from surrounding temperatures.

Abstract: Apparatus (10) for vertical (72) slip forming of concrete walls and columns (55). The apparatus comprises an attachment portion (23) for a frame with a slipform assembly inside comprising an extrusion form providing side walls defining a cavity and actuators (20) to adjust the position of the side walls forms essentially arranged along the longitudinal axis of the slipform assembly. A concrete supply (45) is connected with the slipform assembly for delivering concrete (52, 53, 54) to that cavity through the top open surface. A mechanism (20) is provided for vertically displacing (72) that slipform assembly incrementally relative to the frame. Thus, a concrete structure (55) having a vertical orientation is continuously cast. The actuators (20) adjust the position of the side walls during the incremental vertical movement (72) of the slipform assembly to create new forms for a column or wall with variable diameter, variable form and/or twisted.

Abstract: A crane system includes a structural truss positioned within a central opening defined by an inside surface of an annular tower, a crane mast connected to an outside surface of the annular tower, and a jib arm connected to the crane mast.

Abstract: An energy unit capable of being configured in a transportation configuration and in an operational configuration. The unit comprises a container having first and second ends opposing a longitudinally-extending central section. In the transportation configuration, the container's central section is positioned generally parallel with a supporting ground surface. In the operational configuration the container is configured to be positioned with the first end on the supporting ground surface such that the second end is set apart in an upward direction from the supporting ground surface. The energy unit additionally comprises a wind turbine for generating electrical energy. In the operational configuration, the wind turbine is configured to be received within the interior space of the container, while in the transportation configuration the wind turbine is configured to extend from the exterior surface of the container.

Abstract: This invention relates to a positioning apparatus for an upright panel of a building, the apparatus comprising a base adapted to depend from a structure associated with the building or construction thereof, a support for an edge of the panel, and a positional adjustment means depending from the base which provides for positional adjustment of the support relative to the base. A system for positioning a precast panel which incorporates the apparatus, along with methods for using the apparatus and method are also disclosed.

Abstract: The present invention discloses a method and a forming system that reduces the hydrostatic pressure caused by casting freshly mixed concrete or other cementicious material into vertical forms. Reducing the hydrostatic pressure in forms enables relatively weak materials to be used as form boards and minimizes the amount of bracing necessary to support the form boards—both of which lead to lower construction costs. The method uses the highly thixotropic properties of no-slump or low-slump concrete which enable the concrete to be quickly changed from a semi-solid state to a liquid and back to a semi-solid state numerous times before it hardens and without affecting the concrete's quality. Since hydrostatic pressure is only present when a liquid state exists, minimizing the amount of liquid concrete in vertical forms will also minimize the hydrostatic pressure present.

Abstract: A dual ratchet pawl jacking system, device, and method are presented for raising and/or lowering a platform bearing carriage along a vertical support. The ratchet pawls alternate supporting the weight of the carriage by engaging against a series of lugs on the vertical support. A first pawl is attached to the main frame of the carriage, and a second pawl is attached to a sub-carriage assembly that slides upward and downward within the carriage frame. A hydraulic jack applies a force upon the sub-carriage, causing the sub-carriage to move within the frame. The weight of the carriage is alternately borne by each pawl as the other pawl is relocated to a new lug. A pair of triggers is used to retract the first pawl and second pawl from the support. The triggers may be enabled to facilitate lowering the carriage, or disabled to facilitate raising the carriage.

Abstract: A climbing shoe (10) of a climbing formwork for fixing to a concreting section (14) of a building comprises a sliding shoe part (16) on which claws (50) are provided. At least one claw (50) is provided in a pivotal and/or telescopic manner on the sliding shoe part (16).

Abstract: A method is proposed for constructing multi-story concrete structures using a rail-guided self-climbing formwork system. A climbing rail is thereby displaced in a vertical direction within lower and upper climbing shoes and a lower extension piece is positioned to extend vertically in a downward direction below a lower end of the climbing rail. The lower extension piece has a length which is less than the length of the climbing rail. The climbing rail is then displaced in the vertical direction until the lower extension piece is captured within the lower climbing shoe. The method simplifies construction of the lower stories of concrete structures.

Abstract: The invention concerns a scaffold element adapted to be removably attachable to a bridge, the scaffold element comprising support member for supporting the scaffold element onto an upper surface of the bridge and a support structure which is secured to the support members and which extends to a distance outside the edge of the bridge and to a distance below the bridge. The invention is characterized in that the scaffold element further comprises a longitudinally adjustable support bar pivotally connected to the support structure and being supportable against a lower surface of the bridge and adjustment means for adjustably attaching a vertical mold wall onto the support structure of the scaffold element at a distance outside the edge of the bridge for forming a mold between the wall and the bridge. Also a scaffold arrangement and method of use are disclosed.

Abstract: A jump form system provided variously with an integral jump shoe lock mechanism, a reversible gang form shear platform, and a pinion lock mechanism for a roll back carriage. The jump shoe lock mechanism includes a lever pivotably mounted to the jump form system frame above a jump shoe bearing portion of a connecting member, a sleeve mounted to the jump form system frame below the jump shoe bearing portion of the connecting member, and a sleeve-mounted safety pin that is mechanically linked to the lever for engagement and disengagement with a jump shoe. The pinion lock mechanism includes a rack and pinion provided on inner and outer portions of a telescoping carriage assembly, respectively, and a lock arm pivotably mounted to the outer portion adjacent to the pinion, with the rack, pinion, and lock arm including complementary teeth which are locked into place upon pivoting engagement of the locking arm.

Abstract: Scaffold systems (SMV) to make substantially vertical building works, with sensitive time and manpower savings. In an advantageous embodiment, a scaffold is formed by a couple of modular semi-scaffolds which face each other, a semi-scaffold being placed in a cis-position over the work under erection and the other semi-scaffold is set in the trans-position.

Abstract: A jump form system provided variously with an integral jump shoe lock mechanism, a reversible gang form shear platform, and a pinion lock mechanism for a roll back carriage. The jump shoe lock mechanism includes a lever pivotably mounted to the jump form system frame above a jump shoe bearing portion of a connecting member, a sleeve mounted to the jump form system frame below the jump shoe bearing portion of the connecting member, and a sleeve-mounted safety pin that is mechanically linked to the lever for engagement and disengagement with a jump shoe. The pinion lock mechanism includes a rack and pinion provided on inner and outer portions of a telescoping carriage assembly, respectively, and a lock arm pivotably mounted to the outer portion adjacent to the pinion, with the rack, pinion, and lock arm including complementary teeth which are locked into place upon pivoting engagement of the locking arm.

Abstract: A climbing shoe (10) comprises a sliding shoe section (16) and wall shoe section (18). The sliding shoe section (16) is designed so that it can guide and hold a climbing rail. The wall shoe section (18) is connected to the sliding shoe section (16) in an articulated manner.

Abstract: An adjustable Formwork climber apparatus is described which may be used for casting walls having an overhanging portion. The climber is used for supporting both vertical and horizontal formwork on the same supporting brackets. Adjustment mechanisms are provided for positioning or tilting the vertical and horizontal formwork. The adjustable formwork climber can be used both for casting continuous vertical structures, and for structures having an overhanging or protruding portion such as a ring-beam.

Abstract: A wind turbine is formed of a concrete tower which is erected by slip forming. A primary lifting device is erected onto the tower by being lifted together with the slip form and being subsequently transferred onto the tower from the slip form after the tower has been formed. The nacelle, generator, and rotor of the turbine are then lifted onto the tower using the primary lifting device. A secondary lifting device supported on the tower is used to lower the primary lifting device to the ground after the nacelle, generator and rotor are assembled. The height of the tower is therefore not limited by the availability of suitable cranes so that a greater height of tower can be erected to take advantage of winds at greater elevation.

Abstract: An apparatus may include a nozzle assembly configured to extrude material through an outlet; and a controllable robotic arm coupled to the nozzle assembly, the robotic arm having at one end a gripper configured to pick up an element and deposit the element at a desired position relative to the extruded material. The element may be one of: a reinforcement member for a structure being constructed; a segment of a plumbing pipe; an electric network component; and a tile.

Abstract: A self-raising form control system and method is provided that that may be used to form elevator shafts and other vertical building structures. The apparatus includes one or more form elements for defining an area to receive a formable material, such as concrete. Each element is attached to the form structure. A lift apparatus is provided for lifting the form elements. The lift apparatus comprises a measurement device for measuring the position of said lift apparatus relative to a fixed point. The lift apparatus is connected to the form structure. A control unit is provided for controlling the lift apparatus. The control unit is signal connected to the measurement device and is signal connected to the lift apparatus.

Abstract: A vertically adjustable overhang bracket uses an elongate base component adapted to be supported from a support column. A frame member is slidably secured to the base component to allow movement of the frame along the length of the elongate base component. The frame is of a shape to provide an outwardly extending support member for supporting concrete formwork members to one side of the base component. An actuator controls the position of the frame, relative to the elongate base component. With this arrangement, concrete formwork can be more easily supported in a cantilevered manner from support columns and vertically adjusted quickly to the proper position. Removal of the formwork is simplified as the frame can be lowered, relative to the base component providing clearance for removal of the bracket and the formwork.

Abstract: A rail-guided climbing system comprising climbing brackets (36, 38, 40) in which climbing rails (32, 34) are guided, rigidly fixed to a scaffolding unit (12). Each climbing bracket (32, 34) comprises a joint (52) arranged between a first climbing bracket (40) and a second climbing bracket (38). The free end of the climbing rail (32, 34) may be inserted into a climbing bracket (36, 40) rigidly fixed on the construction (16) and the angular position of adjacent climbing rail sections (48, 50) is adjusted via the joint (52) by means of an adjuster device (58, 68).

Abstract: A robotic system may include a movable gantry robot, and a nozzle assembly movably coupled to the overhead beam of the gantry robot. The gantry robot may include an overhead beam extending between, and supported by, at least two side members slidably mounted on a pair of rails. The nozzle assembly may be coupled to the overhead beam of the gantry robot, and may be configured to extrude material through an outlet. The robotic system may further include a position controller configured to control position and movement of the gantry robot and the nozzle assembly.

Abstract: A climbing shoe (10) of a climbing formwork for fixing to a concreting section (14) of a building comprises a sliding shoe part (16) on which claws (50) are provided. At least one claw (50) is provided in a pivotal and/or telescopic manner on the sliding shoe part (16).

Abstract: The climbing system comprises an upper head (5) attached to the bracket arrangement (3) and also solidly joined to the body of a hydraulic cylinder (6) the rod whereof is attached to a lower head (7), both heads (5) and (7) having a body (8) with upper (9) and lower (10) wings defining there between guides that encircle the upright (1), each of the heads having a rocker (11) that can act on flanges or blocks (14) distributed along the upright (1). The rocker is mounted on a transversal axis (12), against the action of a spring (13) that permanently acts on the rocker in any of its operating positions, and there is an outer handle (19) solidly joined to the transversal axis (12), which can make said axis (12) rotate to change the position of the rocker in relation to the upright (1). The system also has a safety device that makes it possible to limit the positions of the rocker.

Abstract: A prefabricated form assembly for making a concrete floor is disclosed. The form comprises an elongated form plate having a front for forming and retaining a flowable concrete material before it sets, anchor elements extending from the back face of the form plate, and being destined to be embedded into the concrete floor; and an L-shaped lintel having a back wall connected to the front face of the form plate and a bearing wall for supporting a masonry wall. Advantageously the construction of a concrete floor adapted to structurally retain a masonry wall using prefabricated form assemblies according to the invention no more requires the use of different groups of workers from different building trades as in the prior art, only one group of workers is required.

Abstract: An apparatus may include a nozzle assembly configured to extrude material through an outlet; and a controllable robotic arm coupled to the nozzle assembly, the robotic arm having at one end a gripper configured to pick up an element and deposit the element at a desired position relative to the extruded material. The element may be one of: a reinforcement member for a structure being constructed; a segment of a plumbing pipe; an electric network component; and a tile.

Abstract: This is an improved method of building with fibrous material though other materials can be substituted. A binding secures fibrous material to form a wall assembly (10). Wall surfacing (20) can be included in the binding and forming process, reducing the labor required to apply it. Other building features and components can also be included in the binding and forming process such as electrical wiring, furring strips, windows, doors and structural reinforcing. This method vastly reduces the difficulties encountered when installing these components. The versatility of the method also allows for attributes such as flat wall surfaces and variable wall thicknesses, which are difficult to achieve using baled fiber.

Abstract: Formwork for erecting a crown on a top end of a structural concrete column of a highway bridge is supported by a pair of vertically positioned elongated jack-screws. Lower ends of these jack-screws are threaded respectively into adjusting nuts seated on outer ends of respective horizontal arms of a pair of brackets. Each bracket includes an upright support member. These members are attached respectively to opposite sides of the column. The vertical location of the formwork attached to an upper end of a jack-screw may be adjusted up or down by selective rotation of the adjusting nut into which that jackscrew is assembled.

Abstract: Disclosed is a formwork element (1) which can be assembled with other formwork elements (1) so as to form a formwork structure. A formwork shell (4) having an adjustable curvature is supported by means of back supports (5) so as to create a stiff formwork element (1) that sustains concreting pressure. The supports (5) have a preferably trapezoidal cross section and are provided with fastening flanges (6) on the edges thereof and at least one girder (7) that is located at a distance from the formwork shell (4). The length of the girder (7) is adjustable in order to set or modify the curvature of the formwork shell (4) which is mare of steel or plastic. Intermediate pieces (9) are disposed between the fastening flanges (6) of the supports (5) and the formwork shell (4). The fastening flanges (6) are fixed to said intermediate pieces (9) so as to be pivotable or tiltable relative thereto about the longitudinal direction thereof.

Abstract: An apparatus for forming concrete structures includes a first truss module and a second truss module, as well as a first and a second concrete form. The apparatus further includes a first and a second actuator device. Each first and second actuator device is mounted on the respective first and second truss module, and each first and second actuator device can move the respective first and second form translationally with respect to the respective first and second truss module. A yoke connects the first truss module to the second truss module to thereby place the concrete forms in generally parallel, spaced-apart relationship. A climbing device attached to the yoke can engage a climb rod and can move the apparatus upward along the climb rod.

Abstract: A method is provided for use of a concrete composition and an associated apparatus. The method provides for mixing of the concrete material, accelerant powder and, optionally, an associated substance to enable the controlled hardening of the concrete material in a monolithic structure. The apparatus can dispose a slip-plane film to facilitate a relatively continuous process.

Abstract: A method of forming a circumferentially closed wall having the same cross-section over its entire length included providing at least two circumferentially closed inner falseworks each formed of circumferentially closed inner part and a circumferentially closed climbing strip releasably securable to an upper end of the main part. A concrete wall is formed in a plurality of concrete-placing steps, with use of the inner falseworks in more than one step. In a first concrete-placing step, an initial section of a concrete wall is formed. In each subsequent concrete-placing step, a circumferentially closed concrete wall section is formed on an upper end of an already formed section of the concrete wall.

Abstract: A method for successive concrete of high vertical walls by using a climbing shuttering system having a support structure on which various concrete shuttering elements are loaded hanging downwards. The top supporting carrier and the climbing shuttering system can be supported on completed wall sections. There is at least one lifting device that brings about a relative movement between the too supporting carrier and a lower support carrier of the climbing shuttering system. The shuttering elements can be positioned in a substantially even surface to form a shuttering and at the same time the top supporting carrier can be positioned on the shuttering elements placing them respectively against the walls.

Abstract: A method of forming a circumferentially closed wall having the same cross-section over its entire length includes providing at least two circumferentially closed inner falseworks each formed of circumferentially closed inner part and a circumferentially closed climbing strip releasably securable to an upper end of the main part, and forming the concrete wall in a plurality of concrete-placing steps, with use the at least two inner falseworks in more than one step, with forming in each subsequent concrete-placing step, circumferentially closed concrete wall section on an upper end of an already formed section of the concrete wall, and where during effecting at least one concrete-placing step, one of the at least two inner falseworks, which is used in the at least one concrete-placing step and which was lifted off a mounting site, is placed on the climbing strip which is secured on the concrete wall section formed in a previous concrete-placing step and which forms part of another of the at least two falseworks

Abstract: A self-climbing concrete wall form hoist for forming a concrete wall section atop a previously formed wall section has a wall mounting releasably secured to the previously formed wall section, a moveable vertical mast, a channel in the wall mounting which guideably receives the moveable mast, a platform alternatively supported on the mast and on the wall mounting, upper and lower dog latch assemblies mounted on the platform and pivotable between a platform raising position when the mast is supported on the wall mounting and a mast raising position when the platform is supported on the wall mounting, and an extensible and retractable linear actuator interconnecting the upper and lower dog latch assemblies for raising the platform relative to the mast when the dog latch assemblies are in the platform raising position and for raising the mast relative to the platform when the dog latch assemblies are in the mast raising position.

Abstract: A self-climbing concrete wall form hoist for forming a concrete wall section atop a previously formed wall section has a wall mounting releasably secured to the previously formed wall section, a moveable vertical mast, a channel in the wall mounting which guideably receives the moveable mast, a platform alternatively supported on the mast and on the wall mounting, upper and lower dog latch assemblies mounted on the platform and pivotable between a platform raising position when the mast is supported on the wall mounting and a mast raising position when the platform is supported on the wall mounting, and an extensible and retractable linear actuator interconnecting the upper and lower dog latch assemblies for raising the platform relative to the mast when the dog latch assemblies are in the platform raising position and for raising the mast relative to the platform when the dog latch assemblies are in the mast raising position.