Concrete prestressing jacks for sale hydraulic jacks for pre stressing concrete. Multistrand posttensioning system hydraulic jacks jack type 59. The 18mm strand can work with a dynamic load of 155kn. Capacities 6dahseries, 30ton jacks, stress strand up to. Mammoets strand jacks offer faster and more efficient routes for transporting heavy objects horizontally or vertically, even in situations where the amount of available space is limited. Discussion the strand jack uses a hydraulic system powered by either electricity or diesel. Dlt strand jack, strand jack manufacturer, strand jack purchase. Ppt dlt strand jacks operating sequences powerpoint.
Strand jacks are recognized as the most sophisticated lifting devices currently available. Ale strand jack skidded loadout application example 360p. During lifting operation the strand jack can be fully dismantled for repair with load held in bottom anchor. Strand jack technology offers comprehensive control of a lift including. Includes bibliographical references the vampire of the village g. The strand jack lifting technique originates from the concrete post tensioning. Kinks in the strands may jam inside the jacks or cause the strand to birdcage inside the jack. Dlt strand jacks operating sequences free download as powerpoint presentation. Jacks, industrial rollers, air casters, and hydraulic. A strand jack also known as strandjack is a jack used to lift very heavy e. Join the grabcad community today to gain access and download. A multiwire or strand stressing jack having an annular stressing cylinder arranged within a cylindrical outer casing and a stressing head attached to the leading end of said stressing cylinder, said stressing cylinder comprising a main plate accommodating gripping devices, a leading plate and a trailing plate operatively associated with said main plate, and means for moving said gripping. For lifting applications enerpac strand jacks are calculated with a 2. It is the best choice for the synchronous hydraulic lifting systems and synchronou.
Strand jack heavy lift brochure20100414 united states army. An innovative and complicated strand jack lifting technology was applied to floatover installation of dpp integrated topsides in south china sea. Systems and parts the 6dahseries jacks can be purchased as single complete units with pump, hoses, and gauge. All content included on our site, such as text, images, digital downloads and other, is the property of its content suppliers and protected by us and international laws. Enerpac strand jack systems are available from 30 up to 1. Due to initial failure to lower the four outer support legs, an unfortunate chain of events occurred thereafter, thus yielding a complete failure of the floatover installation never happened in history. Instal module hrsg 300 ton by skidding and strand jack.
Annie besant road, worli, mumbai 400018, maharashtra india. To start lifting the bottom clamp releases the wire and the. Dlt strand jacks operating sequences anchor equipment. A wide variety of strand jack prices options are available to you, such as hydraulic jack. Our standard strand jacks range from the single strand dls15 through to the 66 strand dl s1022 as summarised below, and are all designed to be suitable for use with both 18 mm 7wire drawn strand or 15. The strand jack is positioned on a support beam vertically on top of the location to where the load has to be lifted. Connects strand jack to stator generator by using recommended connector. A complete failure of a floatover installation with strand. To start with the upper anchor grips the strands, and the hydraulic cylinder forces the anchor upwards together with the strand and the load connected to it. Annexurei specification of strand jack for heavy lifting.
For use with smaller strand, jack grippers of different sizes are available. Eight inch and 12 stroke jack assemblies are in stock for immediate delivery. Strand jack strand guide strand jack accessories enerpac. The load is connected to the strands by a suitable block. Thruster installation and replacement using strand jacks. Dorman long technology limited dlts3000 modular jacking tower system page 9 of 16 v2. Despite its smaller size and footprint, the strand jack is capable of lifting a much heavier load than the average crane. Rust deposits on the strands form hard packed areas inside the gripping mechanism during use.
Strand jack dimensions and specifications type 3 type 4 capacity 900 t 900 t working pressure of the cylinder 400 bar 400 bar stroke 400 mm 400 mm strand type dyform dyform strand diameter 18 mm 18 mm max. The grabcad library offers millions of free cad designs, cad files, and 3d models. Increase the function of frequency control based on conventional hydraulic proportion power system, improve the utilization of energy. Banded elastomeric bearings with sliding interface steel roller bearings mechanical pot.
Warner allen a point of law somerset maugham not guilty will scott the idols eye sapper the perfect crime seamark the intruder augustus muir castiron. Reduces overheat and increases reliability of the system. Dlt have supplied and operated many strand jack systems for the installation and replacement of thruster units weighing up to 50 tonnes on drilling ships and floating platforms. Pjm industrial have been supplying mono strand and multi strand prestressing jacks for prestressing concrete since 1999. Dlt strand jack and climbing jack systems free download as pdf file. Enerpac strand jack systems are available from 34 up to 1124 ton capacity. Other strand jack systems usually have the strands hanging free from the jack instead of being coiled as shown. Hydraulic gantry, strand jack, slide system power point. Enerpac hslseries, strand lifting jacks tensioning jacks. Install strand jack on position, according to engineering drawing. Hydraulic strand jacks strand jack systems enerpac. Ale strand jack skidded loadout application example 360p by ale heavylift on vimeo, the home for high quality videos and the people who.
Install hagun gantry crane, according to engineering drawing. The grippers are hydraulically released from the strand when the jack is fully retracted. The computeraided design cad files and all associated content posted to this website are created, uploaded, managed and. Lifting steam drum by strand jack 3d cad model library. Pdf the 4000 tonne lift of stonecutters bridge steel backspans, h. Lifting steam drum by strand jack in 3 types of connection. The strand jacks employ a strand management system consisting of a strand guide and recoiler. A strand jack is a hollow hydraulic cylinder with a set of steel ropes the strands in the name passing through the open centre, each one passing through two clamps one mounted to either end of the cylinder.
The coordination between cylinder and anchor heads is done using computer software. Lifting for catalist cooler by strand jack 30march2014. The limitations are that models cannot be saved and models with more than. Strand jacks offer a compact, economic and highly controllable solution for heavy lifting and lowering operations.
Olmsteds system keeps the strands coiled and only allows the length needed for each lift to be deployed. General arrangement drawings of these strand jacks and fixed anchors are given on the following pages. Heavy lifting system with 11 x 3720 kn strand jacks, 6 pumps, a master. In a strand jack, a bundle of steel cables or strands are guided through a. We manufacture strand jacks from 15 tonnes capacity per jack though to 1672 tonnes capacity per jack, together with power packs and control systems to enable controlled lifting of heavy objects at up to 80 lifting points or more, and with lifting speeds usually of between 5 50. In addition to the jack maintenance requirements listed in items i 5, particular care must be taken with the lifting or pulling cables. All our systems are supplied with a comprehensive manual for the operation. Strand jacks are specially configured hydraulic jacks, which can give continuous pulling or lifting movement. Strand jack hydrospex strand jacks, 100 ton strand jacks.
The full range of ram travel should be tested as well as the effect of offcenter loading. The jack operates in the manner of a caterpillars walk. Installation engineering and execution of offshore. Lifting for catalist cooler by strand jack 30march2014 this file by xref. Strand jacks are mainly used with towerlift system. Pdf a heavylift scheme has been developed for the erection of the 88 m long steel deck sections around the towers of stonecutters. Telescopic strand guide tubes through the full height of strand jack to prevent buckling and birds nesting of strands inside of the jack. For use with smaller strand, jack grippers of diff erent sizes are available. Provides a guide for the strand as a strand jack lifts the load. A mechanical jack employs a screw thread for lifting heavy equipment. Ale strand jack skidded loadout application example duration. Nov 17, 2015 wolf hunt by jeff strand in djvu, epub, fb3 download ebook. Lifting for catalist cooler by strand jack 30march2014 3d. Jack for pdf provides all features to edit any pdf including password protected ones.
Dlt strand jack and climbing jack systems elevator engineering. A combination of a number of strand jacks can lift very heavy loads of thousands of tons, whereas the jack itself weighs less and occupies only a very small footprint. Fieldproven tools for mono strand tensioning durable, fieldproven designs, the ptj and da models feature softgrip ergonomic handles reducing operator fatigue singleacting ptj models, with springseating and optional powerseating, are equipped with the enerpac rc series cylinders with a 10 stroke, ideal for slabongrade applications. Annexurei specification of strand jack for heavy lifting 1. In a strand jack, a bundle of steel cables or strands are guided through a hydraulic cylinder. Strand7 free finite element analysis fea demo software. A strand jack is a heavyduty piece of machinery used to lift and lower heavy loads. Details shall be as per annexure enclosed in the tender. Chesterton the dream agatha christie the ginger king a. The following sections give a brief introduction to each type of jack.
It performs a similar function to a standard crane, but is much smaller. For lifting applications enerpac strand jacks are calculated with a 2,5 safety factor against breaking load to working load. The computeraided design cad files and all associated content posted to this website are created, uploaded, managed and owned by third party users. The number and type of strands used in a jack determine the safe working load of a jack. Annexurei technical specification of strand jack for heavy. The most common form is a car jack, floor jack or garage jack, which lifts vehicles so that maintenance can be performed jacks are usually rated for a maximum. All the functionality of the full version is available. Prestressed anchorpost tension systemprestressed concrete. The strands themselves can vary in number and thickness, but dictate the jacks safety and ability. References subcommittee on new highway material 1990 ground anchor inspectors manual, in. Strand jack applications engineered lift using multiple jacks by mammoet usa. This app allows to edit the text of the document and add your own, as well as you can add different figures. The sequence of operation is illustrated with the lock devices shown inred when the wedges are closed. Strand jack sign up for new stories, news and personal offers hareket catalog download our online catalog.
The lock devices are shown in bluewhen the wedges are open. Discussion the strand jack uses a hydraulic system powered by. Dlt strand jacks operating sequences 1 dlt strand jacksoperating sequences 2 strand cable safe lifting capacity 15. For more information, select the following product pdf. Each installation is delivered with an instruction and operation manual in english. A strand jack is a system similar to a jack, however in this case the load is not pushed up, but the jack pulls up a bundle of wires, which is called a strand.
Hydraulic strand jacks the strand jack lifting technique originates from the concrete post tensioning principle. During actual field assembly, refer to method of works install and erection drawing rigging plan. The strand jack lifting technique originates from the concrete post tensioning principle. For full details of our strand jacks, power packs and control systems please download our. Hydraulic system for strand jack exclusive china jiangsu. Annexurei technical specification of strand jack for. A jack, screwjack or jackscrew is a mechanical device used as a lifting device to lift heavy loads or to apply great forces. Mar 04, 20 hydraulic strand jacks heavy lifting done safely. Offered strand jack system model as per specification must be in current manufacturing range. Start position and step 1 of the jack down cycle the start position see figure 12. Feb 03, 2015 ale strand jack skidded loadout application example duration. Dlt strand jacks 15 to 1672 tonnes capacity per jack. Strand jacks provide a compact and cost effective solution for handling heavy thruster units and we have also developed a system of modular power packs and jacks that.
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