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Gantry crane

Long popular in Europe, gantry Cranes have become a widely accepted alternative to overhead bridge cranes. This type of crane is similar to the bridge crane except that it runs on a runway at the floor level. The bridge is supported by a pair of rigid steel legs which are carried

Crawler Crane

that provide stability and mobility. Crawler cranes range in lifting capacity from about 40 to 3,500 short tons (35.7 to 3,125.0 long tons; 36.3 to 3,175.1 t). Crawler cranes have better manoeuvrability and can be quickly relocated at diffeRent locations on a project site. However, for shifting to another project site, these cranes require a truck or a trailer. The inability to be shifted from one site to another on its own is one of the main disadvantages of the crawler crane. Nevertheless,

port crane

for handling containers. The Port Crane is mainly composed by lifting mechanism, rotating mechanism and slewing mechanism. These three mechanisms can work separately or jointly. The single-jib or four-jib Port Crane can be chosen according to diffeRent requested lifting capacities.

Pipe Layer Machines

Pipe layer dozers are those heavy machines that are utilized for laying heavy pipes. Apart from dozers, Pipe layer machines are of diffeRent kinds like heavy duty tractors, wheel front loaders, wheel tractors, cranes etc. The pipelayer machines are either wheel mounted or are track mounted. Track mounted are meant to work in rough terrains.

Jib Crane

Jib Crane is another important type of bridge construction machinery. Jib cranes derives their name from the horizontal beam, or jib, upon which the shuttle or hoist is mounted. With horizontal load-supporting boom fastened to a rotating vertical column,

Gantry Crane

Gantry Cranes are those cranes which are generally used for moving heavy loads. They are a common type of portable material handling equipment used in job station or secondary task areas. Gantry cranes are quite similar to overhead cranes except that

FAQ About Rent A Crane

  • Truck Crane Standard Carrier Equipment

    • housing with sliding cover optimizes engine access while reducing weight and improving corrosion resistance. AXLES AND SUSPENSION Rear Axles - 60,000 lb (27 216 kg) capacity tandem axles with heat treated housing have inter-axle diffeRential with lockout. Axles are mounted on standard air suspension system over equalizer beams with shock absorbs to distribute weight evenly. Front Axles - 48,000 lb (21 772 kg) capacity tubular beam type axles are mounted on standard air suspension

  • A Crane and Heavy Equipment Maintenance Plan

    • The crane and heavy equipment maintenance plan for XYZ Construction was developed using Proctor and Gamble's Key Elements of Safety as a general guide. The company curRently utilizes these Key Elements of Safety as the philosophy in their loss management and risk control department. Therefore, integration of this philosophy when managing risk in the maintenance department was considered essential.By incorporating these

  • Travelling Cranes

    • the possibility of deposits (which cannot be avoided) accumulating on the track, must be taken into consideration. These deposits, which may be due to infrequent use, excessive dust or otherwise, could resist the safe discharge of an electrical curRent.

  • Tower Crane Safety Devices

    • overflow valve, counterbalance valve, two-way hydraulic lock, stewing warning lamp and travel warning lamp, etc. Load Moment Limiter Detection function: automatically detect boom angle and lifting load. Display function: real time display curRent Actual load, working radius and boom angle. Warning function: automatically send out warning and stop crane operation when detecting actual load exceed rated load, boom out of limit angle. Detection function: automatically detect boom angle

  • Crane History

    • internal combustion engines and electric motors were used to power cranes. By this time, steel rather than wood was used to build most cranes. During the first half of the twentieth century, European and American cranes developed in diffeRent ways. In Europe, where most cranes were used in cities with narrow streets, cranes tended to be built in the form of tall, slender towers, with the boom and the operator on top of the tower. Because quiet operation was important in crowded

  • The Manufacturing Process Of Crane

    • a series of dies which reduce its diameter to the desired size. Several wires are then twisted together to form cable.Steel arrives at the crane manufacturer and is inspected. It is stored in a warehouse until it is needed. The many diffeRent components that will later be assembled into cranes are made using a variety of metalworking equipment. Lathes, drills, and other precision machines are used to shape the steel as required. Assembling the crane A crane is put together from

  • News conference addresses concerns over tower crane safety

    • crane accidents occur as a result of human factors and not as a result of any inherent flaw associated with the equipment or technology,” he said. Smith made note of the new technology and how it is imperative to stay curRent And properly utilize the safety features engineered into new equipment. For Smith, crane operator certification and professional training would help the industry. “When a professional risk management approach is applied, the

  • Design and Optimisation of Crane Jibs for Forklift Trucks

    • by means of the F.E.M. applied to crane jibs. This analysis has been carried out in terms of strength and stiffness, and for any type of crane jib: telescopic crane, lattice crane, closed beam crane, etc. There have been simulated diffeRent load cases and boundary conditions that the structure should bear. This load cases can be obtained from normal and extreme operation of the crane, and there have been taken into account current regulations and previous experience. It

  • FACTORS BEHIND THE SELECTION OF CONSTRUCTION EQUIPMENTS

    • The selection of the appropriate construction equipment is an important part of job planning. The contractor has many diffeRent options to choose from, which makes the selection even more complicated. A planner has to choose the alternative that provides the best value from a cost and schedule perspective. Selection of equipment for construction projects generally

  • Hydraulic Telescoping Gantries

    • are awkward, or where other conditions make use of the gantry the most economical means to perform the work required. These systems first came into regular use for rigging during the early 1980s. Characteristics of hydraulic gantries are diffeRent from those of other rigging equipment. Cranes will fail without warning when structurally overloaded to the limit. Gantries, on the other hand, can be made to refuse excessive loads by control of hydraulic pressure. But gantries can be sensitive

  • Truck Carriers

    • should not be confused with ordinary commercial truck chassis. A crane carrier is designed and built for no other purpose than crane service. Figure 2.13 shows a carrier for a 300-ton model. It is still clear that this chassis is quite diffeRent from that of a standard truck. The largest units may have as many as nine axles. A variant is the so-called truck which has a telescopic boom and stabilizers mounted on a more-or-less conventional truck chassis. The mounting must meet specifications

  • Tower-mounted crane

    • too. The hoist motors on older machines have high- and low-speed ranges with stepped increments in each range. More recent models have variable- frequency drive or other forms of continuously adjustable speed motors with friction or eddy-curRent brakes and creep speed. Automatic acceleration for all motions is typical on many cranes. Remote controls are sometimes offered- A tower crane is said to be rop-.cleaving-.!erring being the preferred tower crane term for swing motion-if the

  • Mobile Crane Ground Support Capacity

    • level at the site. When evaluated on the basis of strength alone, most soils can support higher crane loads than the building design values would indicate. Although cranes are often operated on the ground on uncribbed floats with appaRent success, there is actually great risk involved in doing this on most soils. Standard outrigger floats are limited in size by weight and stowage considerations and therefore can induce very high [15 tons or more per square foot (1.44 MN/m2)]

  • Crane Classification

    • CMAA Crane Classification As to the types of cranes covered under CMAA Specification No. 70 (Top Running Bridge and Gantry Type Multiple Girder Electric Overhead Traveling Cranes), there are six (6) diffeRent classifications of cranes, each dependent on duty cycle. Within the CMAA Specification is a numerical method for determining exact crane class based on the expected load spectrum. Aside from this method, the different crane classifications, as generally

  • MOBILE CRANES INTRODUCTION

    • is sight, where there is free and dependable ground and where it is necessary to "walk close to the hob", a crawler or truck crane should be considered. A valuable characteristic of truck, crawler and locomotive cranes is the diffeRent ways in which a standard model can be put to use by the mere change of attachments, such as electromagnets or buckets for handling of bulk materials. Performances factors in which various cranes differ include lifting capacity, radius

  • Crane accessories and auxiliary equipment

    • design programs Power supply line Demag DCL compact conductor line for 4 to 7 poles; connections ensure long-term power supply and minimize unplanned downtime Pre-assembled building blocks for simple assembly or replacement of curRent collector trolleys or complete straight sections provide optimum serviceability IP 23 or IP 24 high protection against accidental contact with sealing lip and integral expansion joints for optimum safety Travel unit Maintenance-free

  • Introduction of overhead crane operator

    • Commission for the Certification of Crane Operators (NCCCO) is an independent, nonprofit organization formed in 1995 to set standards for fairly measuring the knowledge and proficiency required for the safe operation of cranes. NCCCO curRently administers a nationwide program of certifications for crane operators and related trades, including riggers and signalpersons. Based on extensive discussions with representatives from all segments of business and industry who recognize the impact

  • Jib Cranes

    • life. They are used to serve a multitude of purposes besides being utilized for a variety of applications in docks, ship yards, sites for building construction, ware houses, factories, etc. This multi-utility equipment comes in diffeRent types and is grouped according to their designs and the functions that they perform. There are pillar jibs, swing jibs, articulating jibs, portable jibs, truck jibs, etc. It is also to be noted that the military uses crane jibs to meet a variety

  • Lorry Mounted Cranes

    • Cranes -- these mobile cranes consist of a lattice or telescopic boom mounted on a specially adapted truck or lorry. They have two operating positions: the lorry being driven from a conventional front cob and the crane being controlled from a diffeRent location. The lifting capacity of these cranes can be increased by using outrigger stabilising jacks and the approach distance to the face of building decreased by using a fly jib. Lorry mounted telescopic cranes require a firm surface from which

  • Crane Steel Structures Test Problems

    • CurRently, the steel plant are widely used in plant construction. Because of its short construction period, construction process is relatively simple, low cost and other advantages, except for some special occasions, the steel plant is always given priority.

  • Crane Control program analysis and comparison

    • three-phase AC motor disconnect power to the two-phase stator winding leads to the formation of the early air-gap magnetic field excitation current, the motor load in the potential of cutting the air gap under the rotor magnetic field, induced curRent And braking torque. Rectified and then into the stator windings, so that increased air-gap magnetic field excitation current enhanced braking torque increases. Braking torque equal to the potential energy load torque acting on the motor shaft, the

  • Electric Hoist Failure Analysis and Treatment

    • an abnormal motor noise, should be immediately shut down, check whether the motor running single phase, or bearing failure, coupling axis errors and the "sweep bore" and other failures, which will cause abnormal motor noise, the sound of diffeRent fault location and the level and the sound difference, single-phase operation, the motor issue regularly suddenly strong suddenly weak, "buzzing" sound; and bearing damage when the bearing near the issue along with "Ko Deng - Ko Deng," the "buzz"

  • Metallurgical cranes on the technical requirements for special work

    • when the ambient temperature exceeds 40 ? of the occasion should be used in Class H motor insulation; 2. Equipped with two sets of independent role of the brake (dual braking); 3. To be installed from the weight limiter; 4. Equipped with diffeRent forms (usually a heavy hammer and rotary-type and use) the location of the rise in the double limit stopper (double limit), and should control the various circuit devices, lifting height greater than 20m of cranes, It should also be installed as

  • Crane why not reverse the brakes?

    • can skew deformation of the body; reverse braking system will place the connection gear fierce impact, damage gear, resulting in equipment accident; reverse slam the brakes also make the electric power generating unit is Large torque and strong curRents, a serious burn out the motor. Reverse brakes also make the air cause hanging objects swing hanging objects fall occurred. So, at work, except in case of an accident in order to avoid the special danger outside, does not allow reverse slam the

  • Standardization of Jib Crane Design by “F.E.M. Rules” And Parametric Modeling

    • technology that is mainly based on the accumulated previous experience is important for better performance, higher safety and more reliable designs. It is well known that generic features of jib crane components are similar for various diffeRent types of cranes. Since the jib crane design procedures are highly standardized with these components, main effort and time spent in jib crane design projects are mostly for interpretation and implementation of the available design standards. Many

  • BossBuyer Gantry Cranes

    • multiple industries. BossBuyer Gantry Cranes are available in steel, aluminum or a lightweight model along with adjustable heights and spans. With a BossBuyer Gantry Crane, you can: Easily relocate the entire gantry crane with your Rental or leased facility operation or provide its utility in more than one area Maneuver product in tight spaces or uneven surfaces Add affordable, supplemental supporting parts to an existing crane About Our Gantry Cranes: Gantry

  • Bottom-Slewing Tower Cranes Structure and Configuration

    • crane; however, it is foldable for fast erection and dismantling and, in many models for a shorter jib work option. Some models feature a telescoping jib. Unlike top-slowing cranes, where the horizontal jib and the luffing jib are two diffeRent crane configurations altogether, the jib of the common bottom-stewing crane can usually be raised, though not in a sharp angle (commonly up to 300), while maintaining trolley movement. This grants the initially height- limited crane an additional

  • YJCrane Gantry Crane

    • beam mounted winches provide visibility and safety for operators. By having the winches mounted below our operators cab, the operator can visually see the winding of the cable and maintenance can be performed without having to climb a ladder or Rent A manbasket. YJCrane Models and Specifications The ISL Models are the “work horses” of our line. The ISL is designed for higher duty cycles and to work all day long. The ISL can handle wide or narrow loads and has a five beam upper

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