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FAQ About Man Crane

• Types of Cranes

They build tall skyscrapers in large cities. And, they help farmers in rural areas. Cranes are used near large bodies of water. They load and unload ships. Cranes are built strong to be used anywhere they are needed. Types of Cranes There are Many types of cranes. Four of these are tower cranes, rough terrain cranes, truck cranes, and crawler cranes. Rough terrain cranes have large wheels that allow them to move throughout a job site. Truck cranes are mobile cranes. This means their

• Wall/Column Cantilever Mount "I" Beam Jib Crane

Wall/Column Cantilever Mount "I" Beam Jib Cranes are ideal for heavier loads from 1 to 5 tons (heavier capacities available, contact the factory). They are also available in motorized or Manual rotation. Used instead of a wall bracket jib crane when headroom is at a premium.Provide hoist coverage for individual use in bays, along walls or columns, and as supplements to an overhead crane or monorail system.Capacities

• Truck Crane Boom Equipment

or 30°. Max. tip height is 164’ (49.99 m)33-57’ (10.15-17.30 m) side stow swing-on lattice type jib. Single sheave mounted on anti-friction bearing. Jib is extendible to 57’ (17.30 m) by means of a 25’ (7.62 m) Manual pull-out tip section, roller supported for ease of extension. Jib is offsettable at 0°, 15°, or 30°. Max. tip height is 189’ (57.61 m).BOOM HEADWelded to outer section of boom. Five or six load sheaves and two idler sheaves are

• Truck Crane Standard Carrier Equipment

brakes apply automatically when air pressure drops below 40 psi (2.8 kg/cm2) STEERING Mechanism includes rack and pinion with integral hydraulic power. Turning radius: To C L of tires: 33-4' (10.16 m) TRANSMISSION Eaton Fuller 11 speed Manual transmission. Optional Allison 4070 automatic transmission has 7 speeds forward and 1 reverse, with neutral safety start. Provides wide ratio coverage with “hands free” shifting. A lock up torque converter further improves performance.

• 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 elements into proactive maintenance techniques, a proactive maintenance

• New requirements about crane maintenance and competent inspecting person

of mobile and tower cranes now need to declare that: the crane was inspected no more than six months before the application, by a competent person who certified that the crane had been maintained to the instructions of the designer and Manufacturer, and with relevant Australian Standards, codes of practice and legislation. For renewals of plant registration, owners of mobile and tower cranes now need to declare that: for the 12 months before the application, the crane

• Construction and Maintenance of Cranes and Lifting Appliances

and be properly assembled. This means that they must be of good design which includes, amongst other things, being well built for the purpose for which they are intended to be used, and be put together properly. The erection and disMantling of cranes and lifting appliances must only be carried out under the supervision of a competent person. This means a person who is fully conversant with the safe and correct procedures to be adopted to ensure the correct erection or

• Testing and Examination of Cranes and Certain Lifting Appliances

1. Cranes must be tested by a competent person before they are taken into use for the first time. They must also be tested by a competent person after they have been altered or repaired in such a Manner that the strength or stability of the crane may have been changed. After the test, the crane must be thoroughly examined by the competent person who must complete a report in the form of a certificate of test. A specimen of the certificate

• Stability of Cranes and Lifting Appliances

test must be recorded on form number CLA.3. shown in Appendix I. The test and report must be carried out by the competent person. When making this test, caution and care has to be exercised to avoid the over-stressing of crane components. Manufacturers instructions should be strictly followed. Anchoring and ballasting materials must be secured to the crane structure in the appropriate and correct position. Where portable ballast is used, a diagram or notice showing its

• Travelling Cranes

In some cases cranes are mounted on rail tracks which may be either temporary or perManent.The tracks must be laid on a firm foundation and a secure and even running surface provided.Materials which could obstruct the crane wheels on the tracks must be prevented from finding their way on to the rails, and the rail tracks must be provided

• Overhead Travelling Cranes

Many fatal or very serious accidents have been associated with the movement of overhead travelling cranes. These accidents have occurred mainly to maintenance workers employed on, or near, the wheel tracks of this type of installation.Where persons are

• Tower Crane Superstructure

to realize the function of logic control and electronic proportional control of the system, greatly improving safety, reliability and efficiency for crane operation. Crane operation can be shown by a larger computer display, and easy for Man-machine interaction. Hydraulic System Electronic proportional control, with combination of close/open type circuit, constant power and variable displacement pump system. Hydraulic system: winch, luffing gear, slewing gear, tower jib backstop,

• Tower Crane Carrier

installed in the middle of it.下wo crawler tracks are symmetrically arranged, with 0.76m track pads. Travel Gear Travel gear drive has built-in planetary gear reducer and hydraulic release service brake, each reducer is driven by GerMan imported axial piston variable displacement motor, can be operated synchronously or indepen- dently to realize straight travel and turning around. Travel Speed Variable displacement motor can realize infinitely variable drive, max. speed

• YGMT Crane types

railway, automobile, etc. YGMT will continue to persist in scientific views of development, and to promote the product brand and enterprise image. With the sense of superior products and honesty, it will continuously meet customer’s deMands of high quality and perfect service. Cranes specification and capacity Ladle Crane : capacity from 50t to 480t Slab Tong Crane: capacity from 25t to 112t Material Charging Crane: capacity from 20t to 110t Magnet Crane Hydropower

• Overhead Crane Inspection

by that show signs of looseness, then replace them all. 2. Cracked Welds Inspection Check cracks in the structure and in all welds. A crack in a weld will always start on the end and work itself along the entire weld until it fails completely.Many times a crack in the paint will be a clue to a weld that is failing. If caught early, the crack many times can be ground out and re-weld. Before welding on any part of the crane, make sure you have a certified welder and if it is on a structural

• Safe Crane Operations

Safe crane operations include:Read and understand the operators ManualFollow all placards, warning labels and signs on machineKnow the SWL of the crane and never exceed itDetermine the weight of the load from accurate sourcesIf an estimate of the load is near the max. capacity of the crane, then use a dynamometer

• Cranes, lifting appliances and fork lift trucks

The Regulations apply to cranes and lifting appliances used in the Manner described in Regulation 2. The terms "cranes" and "lifting appliances" are defined legally in Regulation 1 which deals with the interpretation of various expressions used in the Regulations. "Crane" means:- "An appliance incorporating

• Crane Lifting Operations - Operators of Cranes and Certain Lifting Appliances

factors which should be considered before an operator is certificated Be at least 18 years of age Be medically fit with particular emphasis on eye-sight, hearing and reflexes Fully understand the duties of a slinger and/or banksMan and be familiar with the signalling methods, including the recognised code of manual signals Have a good judgement of distances, heights and clearances Possess sufficient working knowledge of the crane so that he will be capable of carrying

• Crane Lifting Operations - Signalling

Where the load is not clearly visible or the hook of the crane or lifting appliance is not clearly visible to the operator, a signaller (banksMan) must be used to transmit the slingers instructions to the operator. All signals must be clear and concise and should, if they are visual signals, conform to the recognised code of manual signals. The operator must take notice of only the

• Crane Lifting Operations - Secureness of Loads

the load together, for example bricks and packaged materials. In these circumstances the securing straps must not be used to connect the load to the crane or lifting appliance unless the strap is especially designed for this purpose, for example, Man made fibre slings used for handlingcement cargos.

• Crane History

from conveyors, that lift and move bulk materials, such as grain and coal, in a continuous process. The word crane is taken from the fact that these machines have a shape similar to that of the tall, long-necked bird of the same name. HuMan beings have used a wide variety of devices to lift heavy objects since ancient times. One of the earliest versions of the crane to be developed was the shaduf, first used to move water in Egypt about four thousand years ago. The shaduf consists

• Raw Materials of manufacture cranes

The most important substance used to Manufacture cranes is steel. Steel is an alloy of iron and a small amount of carbon. For structures that do not require very high strength, a common form of steel known as carbon steel is used. By definition, carbon steel contains less than 2% of

• Cranes,overhead traveling crane,Construction cranes,Tower cranes,Mobile cranes,Articulating cranes

Very few machines exist in as wide a variety of designs as cranes. Before the crane is constructed, the Manufacturer must consider the site where it will be used and the weight it will need to lift. In addition, cranes are often modified to suit the needs of the user. For these reasons, it is not much of an exaggeration to say that no two cranes are

• The Manufacturing Process Of Crane

steel wires. To make wire, steel is first rolled into a long rod. The rod is then drawn through 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

• Crane Safety and Quality Control

Safety is the most important factor to be considered during crane Manufacturing. The steel used to make the crane is inspected to ensure that it has no structural flaws that would weaken the crane. Welds and bolts joints are inspected as well. The United States government sets specific regulations through the Occupational

• News conference addresses concerns over tower crane safety

Dandrea. “With a conservative estimate of 50 lifts daily per crane, more than 105,000 lifts are executed safely every day.” Standards needed Bill Smith, president of NationsBuilders Insurance Services Claims and Risk Management Services (NBIS), once was a crane operator himself, as well as a training director, corporate safety manager and has held positions within the Dept. of Labor and OSHA. “The largest percentage of crane accidents occur

• Design and Optimisation of Crane Jibs for Forklift Trucks

results for some load cases. Once this correlation has been obtained the methodology of calculation and the numerical results are validated. The article presents a methodology for the design and optimization of crane jib for Manipulative telescopic using the finite elements method. For it, the design attends both to stiffness, strain, weight and regulation criterions and it is possible to apply to all types of crane jibs: telescopic (where the dynamic

• Overhead Crane and Bridge Crane

by the crane, together with atrolley so as to move along the bridge. Overhead Crane Application Overhead cranes are most generally used within the steel business. The steel is dealt with making use of this particular crane ateach stage of the Manufacturing procedure until the product is delivered from the factory. The crane is even responsible forpouring raw materials into a furnace and hot steel is then stored for cooling utilizing an overhead crane. As soon as the coils arefinished they

• 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

• PORTABLE TRUCK-MOUNTED CRANE BOOMS

the truck beds on which they are mounted. There are two forms of this portable type of equip- ment. One is the articulated, short height knuckleboom, which is frequently used to load material on and off the truck. They operate somewhat like the huMan arm with hydraulic controls to make the movements from the "shoulder" at the truck bed through the "elbow" to the "wrist" and "hand" at the load pick up end. This type of boom may have an attachment such as grapples, forks, or other boom attachments.

• Guy Derrick

is fitted at the bottom of the mast. Wire rope is run around the bull wheel, and winch power is used for swinging. Alternatively, on small derricks, an arm, called a ball pole, can be used to provide leverage for pulling the derrick around Manually. Another method, sometimes used on steel erection derricks, makes use of a handwheel and gearing so that one person at the base of the derrick can swing the boom. The topping lift is attached to the mast just below the gudgeon pin. The topping

• Jacking Towers

top to verify that equipment is functioning properly. TV cameras can also be considered for that purpose (Figure 2.49). Though good synchronization requires reliable instrumentation, the strand jack method has a track record of accomplishing Many difficult heavy lifts. During the lift, the load is always held in the grippers when static, and on the center-hole jacks when in motion. Strand-jack system advantages are Precise vertical load control and the ability to correct for lateral

• Hydraulic Telescoping Gantries

assembly can be used in place for lifting, or can be made to travel along steel runway beams or on steel plates over concrete. The original and most common type of telescopic gantry utilizes large diameter multistage lift cylinders with as Many as five stages and fully extended height of as much as 45 ft (13.7 m). The capacity for a pair of units can be 1000 tons (900 t) or more, but the capacity reduces with cylinder extension. The stages sequentially extend with the smallest diameter, and

• Mobile Cranes

modulating power and building in automated limits to the crane controls. In the European Union itself, the attitude is codified in the Machinery Directive, a broad-based safety standard-applied to cranes among a wide variety of machines-that deMands manufacturers eliminate risks and take into account foreseeable misuse. Though American attitudes have not much changed, the prominent position of European manufacturers and the need to satisfy the Machinery Directive for sales in the EU gives

• Truck Carriers

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 for frame stiffness, weight, and axle limitations. A boom

• All-Terrain Carriers

road speeds of truck carriers with some of the off-road capabilities of the rough-terrain crane. Large-capacity multiaxle models have appeared featuring the characteristics necessary to carry the all-terrain label: high road speed, off-road Maneuverability, and drive positions in both the chassis-mounted cab and in the operator's cab mounted on the rotating superstructure (Figure 4). To achieve maneuverability, these cranes typically have all- axle drive and steering as well as crab

• Mobile Crane Tower Attachments

boom is affixed at the tower top, and ajib is sometimes fitted at the end of the boom. Towers and booms are made up of inserts of various lengths so that a number of tower-height and boom-length combinations can be assembled The Manufacturer's instructions generally include an advice that the tower boom must be lowered and fastened to the mast when the crane is out of service (an exception is when very high winds are expected, in which case the mast must be lowered

• Tower-mounted crane

markets for these as well; cable stay and suspension bridges, offshore oil platforms, and power plants are some examples. In most of the world outside U.S., small tower cranes are used for modest-size residential and commercial projects. Many of these rigs are self-erecting machines that are pulled to the site by truck. In North America, similar work woulc utilize a small telescopic crane. Gradually, however, self-erecting tower cranes are penetrating the U.S. market. There is some

• Crane and Mobile Crane

Collateral damage to persons and property was usually inconsequential. Not so today where property damage claims can be stratospheric and the public is often be in harm's way. Society today is far less tolerant of accidents. A high-perforMance contemporary crane cannot be run from intuition; an operator who tries to work that way will not be warned by his gut of an approaching failure and will be blindsided when it inevitably happens. And when it does happen the cost will be intolerable.

• Mobile Crane Clearances

and the boom, but not so long that it will swing into nearby structures. The tail end of the superstructure requires a clear swing path, too. And, after completing the work, the crane must be able to extricate itself and lower its boom for disMantling. Far from all mobile-crane lifts run against these constraints, but they are common enough to demand attention. It is embarrassing, to say the least, to send a crane to a job only to find that it is incapable of placing the loads where

• Mobile Crane Ground Support Capacity

perilous condition, especially for crawler cranes, is a support that is partly on soft backfill and partly on hard ground leading to differential settlement under the crane. Fresh backfilled areas are prone to this hazard.Pavements conceal Manhole chambers and utility vaults that are not fully revealed at the surface. Cellars of urban buildings sometimes extend out under the sidewalk or even under the roadway.Heavily trafficked areas around a construction site are often well compacted

• Single Girder Overhead Cranes and Double Girder Overhead Cranes

for scrap yards, fertilizer plants and induction furnace.Class IV : Extra heavy duty cranes for steel mills and other heavy engineering purposes. Features of Double Girder Overhead Cranes Structure : Bridge girder, end carriages, crab frame Manufactured from box plate design/ Rolled Sections. If required 100% radiography of all but welding joints of bridge and end carriages can be provided. The material of construction conforms to IS:2062, and the bridge is designed for minimum

• Crane Certification

prohibits any firm from using the maritime certification forms for "certifying" equipment outside the maritime industry. Although the basic format of these forms can be used, it must include wording to the effect that such "certification" is not Mandated by OSHA and it cannot contain the Department of Labor heading. As for the other questions initially raised above (aside from the maritime industry), the answers are never; anyone; and anything.

• Crane Overloads and Crane Test Loads

5 ton capacity and above). The procedure varies depending on whether the lift is over 125% of the rated capacity, but generally includes a written plan, engineering analysis if over 125%, pre-lift and post-lift inspections of the crane, perManent record keeping, etc. In cases where the heavy lift occurs more frequently, ASME suggests a permanent rerating of the crane, which of course requires a formal engineering study and load test. It is noted here that OSHA 29CFR1910.179 does not, in

• MOBILE CRANES INTRODUCTION

tyred trucks, rollers or railroad wheels. Most of these cranes are full-rotating. Their mountings make them a distinctive group. Truck, crawler and locomotive cranes have now been highly developed for industrial use and they all have Many possibilities of services to any plant or terminal that has heavy handling to do. The choice of crane, whether a truck, caterpillar or locomotive crane is a matter of determining the equipment which will perform the work most economically.

• A New Approach for Controlling Overhead Traveling Crane Using Rough Controller

is based on a suggested concept of a fuzzy logic controller. A measure of fuzziness in rough sets is introduced. A comparison between fuzzy logic controller and rough controller has been demonstrated. The results of a simulation comparing the perforMance of both controllers are shown. From these results we infer that the performance of the proposed rough controller is satisfactory. The crane can be considered as one of the most important tools used in industry to transfer loads from one desired

• Crane accessories and auxiliary equipment

construction and subsequent costs Infi nitely variable hoist and travel motions guarantee low-sway handling. Precise, gentle positioning provides for greater safety and convenient operation CAN Bus technology to meet tomorrow’s deMands for high data transmission reliability, corresponding to safety class 3 to DIN / EN 954, ensures optimum monitoring for greater effi ciency thanks to preventive maintenance Control system Ergonomically designed control units for safe,

• Crane & Hoist Safety Responsibilities

covered by a program with maintenance responsibility. Conducting periodic and special load tests of cranes and hoists. Maintaining written records of inspections and tests, and providing copies of all inspections and test results to facility Managers and building coordinators who have cranes and hoists on file. Inspecting and load testing cranes and hoists following modification or extensive repairs (e.g., a replaced cable or hook, or structural modification.) Scheduling a non-destructive

• Crane Rigging a Load and Crane Overloading

Crane Rigging a Load Do the following when rigging a load: Determine the weight of the load. Do not guess. Determine the proper size for slings and components. Do not use Manila rope for rigging. Make sure that shackle pins and shouldered eye bolts are installed in accordance with the manufacturer's recommendations. Make sure that ordinary (shoulderless) eye bolts are threaded in at least 1.5 times the bolt diameter.

• Material Handling Solutions

Material Handling Solutions For Your Unique Applications Since 1977, YJM has been an innovator and leader of lifting loads in a work cell. YJM began as a Manufacturer of Gantry Cranes and manually or power operated jib Cranes, including wall bracket, wall cantilever, free standing, and mast type models. In 1986, YJM added a line of Work Station Cranes, which addressed the trend for safe, productive,

• Introduction of overhead crane operator

overhead (bridge) and gantry cranes that meet the requirements of the ASME B30.2, B30.11, B30.16, and/or B30.17 standards and have powered functions for hoist, bridge, and trolley are covered by CCO certification exams. Note that the NCCCO Exam Management Committee draws questions from the ASME B30.2 standard for Overhead and Gantry Cranes in an effort to lessen the burden on candidates preparing to take the examination. Please see pg. 14 for a complete Reference List. The initial certification

• Limiting Tower Crane Operator Fatigue

fewer hours has made on their attitudes (and the fact that they are home more). Contractors also see the benefit of limiting hours in the operator’s seat. Prior to this policy, some contractors would try to keep operators in the cab for as Many as 24 hours straight—and they were willing to pay the overtime just to keep them working. But just because the operators aren’t physically fatigued does not mean this is a safe practice. By keeping them to a 72-hour schedule, there

• What Are Telescopic Cranes?

Telescopic cranes are another form of heavy cranes employed to transport and Maneuver objects from one place to another. Cranes like the telescopic cranes are often used in day-to-day hauling operations but it has also to be noted that these heavy cranes are very important when it comes to carrying out maneuvering operations in

• Topless Tower Crane

The mechanisms of topless tower crane adopt domestic famous factory products, reliable perforMance, good governing performance and shocklessness [caption id="attachment_47" align="alignleft" width="360" caption="topless tower crane"][/caption] Topless Tower Crane Key Specifications/Special Features: ·  Max load 17t (17m) ·  Jib length

• Mini crawler cranes

a footprint of only 3.48 x 3.48 metres. The compact size allows easy transport by air, water, rail and road. Advantages of mini crawler cranes Compact and Tough Suits all types of terrain Highly Manoeuvrable Super Efficient Ideal for restricted working areas Low overall operating weight Low ground pressure Low headroom for internal and underground use Electric, diesel or propane power sources Quick dispatch by truck to site Capacities

• Topless Tower Crane For Sale

The mechanisms adopt domestic famous factory products, reliable perforMance, good governing performance and shocklessness. Key Specifications/Special Features: ·  Max load 17t (17m) ·  Jib length 75m ·  Free standing height 60m ·  Mast section 2*2*3m ·  Tip load 2.6t (75m) Advantages: ·  The section

• Tower cranes

[caption id="attachment_234" align="alignleft" width="241" caption="Tower crane"][/caption] Over-long boom of tower crane is (50/55m),wide range of coverage. Heavy in section of mast section(1600*1600 or 1800*1800), good steel perforMance,complete tower crane is stable and little swing as load.Main material of crane mast section is 160*160*16 angle steel or 125*125*10 buckled square or 135*135*10 steel tube.Electric system adopts domestic fine quality or import components,performance

• Crane Gantry

A crane, which is equipped with a derrick or tower, is used to lower and lift materials with the use of pulleys and cable. Heavy equipment Manufacturers and the construction industry use cranes in various activities connected with their process. Cranes used in the construction industry are mostly temporary structures either mounted on a vehicle which is built for the specific purpose of

• Industrial Cranes

huge trucks. In cities, these equipments are used for electrification maintenance and other jobs. Indeed, cranes are the ultimate equipments need to facilitate their work and to lessen the time they spend in doing certain tasks. There are Many types of cranes and each differs according to its use. Cranes are powered by metal cables, hydraulics system, diesel fuel, etc. These machines can be manipulated remotely using infrared or by photoelectric capability. Cranes that are mechanically

• Jib Crane For Sale

We offer a wide range of self supported and bracket mounted type Jib Cranes having a capacity of 0.25 Tons to 5 Tons. Manufactured using quality raw material, our jib cranes have swiveling up to 360 degrees. Some of our self supported and bracket mounted type jib cranes features are: [caption id="attachment_188" align="alignright" width="243" caption="Jib cranes"][/caption] Capacity

• What should be taken into account when choosing asphalt plant (ABZ)

To date, the world market, there are Many companies offering their services in designing and installing Abs. At its core, ABZ - a complex system of components and assemblies, which is why his choice to go carefully and with great share of responsibility. Need to decide what will be the

• Jib Cranes

that are fixed to the wall. Crane jibs generally possess a mechanism whereby they can be rotated using a wheel and made to turn in an angle up to 360 degrees. All crane jibs do not possess arms that are capable of swinging – some are Manufactured with fixed arms. In such cases, the lowering and lifting of the loads are most often done with the help of a hoist which is either electrically or manually controlled. Jib cranes that are fixed to walls or floors generally have

• Articulating Jib Crane

cranes, articulating jib cranes have a hinge or joint at the center of the horizontal section that lifts the load. This feature enables the user to bend or fold the arm if required. Since it can be folded, articulating jib cranes are easy to Maneuver in small areas with space restrictions. Mostly used in warehouses, large departmental stores and in the food industry, to name a few, articulating jib cranes are excellent equipments for lifting heavy loads in confined and small spaces. However,

• Portable Jib Crane

piece of machinery. By attaching a simple fork lift, any standard design of these cranes can be converted into a portable jib crane. Since the arm of the crane can rotate either partially or fully. Portable jib cranes have the ability to Maneuver and move in small spaces and hence come in handy for almost all general purposes. Another added advantage is their price that is not at all overboard and can be afforded by most people. Like all other varieties, portable jib cranes also

• Crane Control program analysis and comparison

In recent years, updating and development of bridge crane in order to improve crane perforMance as the main indicator, the speed of which the most prominent crane. The following are several commonly used to speed the program cranes were analyzed and compared. 1. Speed ??rotor resistance (1) cam controller to control the rotor resistance

• Electric Hoist Failure Analysis and Treatment

the motor only issued a "hum" sound, not running, and in severe burning of the motor, or even cause the accident, then immediately shut down, reduce the goods, so that work at rated power gourd. 2, electric hoist abnormal noise when running Many electric hoist failure, such as control of electrical appliances, motor or reducer failures, often accompanied by abnormal noise, the noise level and sound location and cause of the fault do not differ on, repair, we should hear and see more, sound

• Metallurgical cranes on the technical requirements for special work

sufficient safety factor, the working class to achieve the M5-level (including the M5 level) above; 7. Select the wire for high temperature situations, and has sufficient safety factor; 8. As far as possible away from heat sources such as the Manipulation of remote control mode, otherwise the operator must set the security channel. (D) The crane must have a transformation of the transformation of units permitted qualified, reform must fulfill the procedures for cranes after transformation,

• General requirements of the safe operation of crane drivers

load hoisting, luffing mechanism of the brake, or increase the operating load range; (5) shall not be suspended from the head on top of things through, hanging objects, and may not stand on the lifting arm. Fifth, in strict accordance with the comMand signal operation, the emergency stop signal, regardless of any person to issue, must be implemented immediately. Sixth, hanging close to or reach the rated load, or lifting of dangerous goods (liquid metal, hazardous materials, flammable and explosive

• Crane Preventive Maintenance Checklist

position locks warning signs Operator’s Cab & Station: grab rails / steps / platforms anti-skid surfaces glass windshield wipers door restraint fire extinguisher mirrors seat restraint seat belt operator’s Manual operating instructions / decals electrocution warning sign (inside) hand signal chart parking brake swing brake positive swing lock controls - forces / movements accelerator / throttle control air pressure hydraulics

• Question About Tower Crane - 1

limit switch allowed to be changed by the operator? A. No never B. Only when the load is to heavy C. When told to do so by site agent How would you check that unauthorised personnel have not re calibrated a limit switch? A. Ask the banksMan B. Known weight to a known location C. Use test button if fitted

• Mast Style Jib Crane

heights, and boom spans available upon request Motorized rotation available 201 Series Mast Style Jib Cranes - Drop Cantilever Identical to 200 Series with the addition of side-plate connections which allows boom to be mounted perManently at any specified height on the mast Lower cost alternative to foundation mounted free standing jibs No mounting foundation required Standard capacities to 5 tons Standard height and span to 20 feet Greater capacities, heights, and boom

• Question About Tower Crane - 3

track facing direction of travel What would stop your crane from running off the end of a track? A. Limit switch B. End of track safeguard C. Sand bags When should your Trolley ropes be tensioned? A. Yearly B. Weekly C. As per operators Manual Where would the operator position the trolley to tension it? A. As close as possible to operators cab B. In the middle of working jib C. At the end of the working jib When adjusting the trolley rope caution should be taken. WHY? A. Because

• Oregon OSHA’s new crane standard for the construction industry

crane onto a structure using a fork or cradle with functioning automatic overload prevention device What are “controlling entities” and what are their duties? Controlling entities include primary or general contractors and construction Managers who have responsibility for the project. Their duties include: Ensuring that ground conditions are firm, drained, and graded Informing the equipment user and operator of the location of hazards beneath the set-up area such as underground

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

design procedures by considering computational approaches and rules in the "F. E. M. Rules" for each jib crane component. The "F. E. M. rules" is selected for this purpose because of its widespread use and established popularity among the jib crane Manufacturers. Access to the "F. E. M. Rules" from any design procedure is fully automated by using a systematic approach of parametric modeling. The parametric model can be used for various jib crane design cases as well as further for optimization. Jib

• Crane Component

drive units with squirrel cage motors, electric hoists up to 125 t lifting capacity, conductor systems, contactor control panels, radio remote controls, variable frequency speed control equipments, etc. BossBuyer crane components represent Many years of experience in combination with permanent development in design. Customers benefit from our wide experience as crane manufacturers and our close cooperation with crane builders worldwide. BossBuyer crane components allow economic refurbishment

• Wall Mounted Jib Cranes

bracket kits include all components except the I-beam, tie rod and mounting hardware, which if preferred, can be purchased locally. IMPORTANT NOTE: This equipment is not, in any way, designed for lifting, supporting, or transporting huMans. Failure to follow the specified load and mounting limitations can result in serious bodily injury and/or property damage. Jib cranes should not be supported from any existing building structure without first consulting a qualified architect

• Rotary and Rectilinear Cranes

Cranes are divided into two classes, as to their motions, viz. Rotary and Rectilinear. and into four groups, as to their source of motive power, viz.: Hand. - When operated by Manual power. Power. - When driven by power derived from line shafting. Steam, Eledric, Hydraulic. or Pneumatic. - When driven by an engine or motor attached to the crane, and orated by steam, electricity, water, or air transmitted to the crane from

• Workstation Jib Cranes

and transferring of loads. An operator could be pushing a 1000 lb. load; however, the operator will experience the force of approximately 10 lbs. to begin moving the load and 8 lbs. to continue moving the load (100 to 1 ratio). Also, a Manual crane operates more quickly than a motorized crane. IMPORTANT NOTE: The maximum weight of the application should match, NOT exceed, the workstation jib crane design weight. The capacity rating is based on a design load which includes

• BossBuyer Gantry Cranes

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 cranes here at BossBuyer are made with 2 main plans in mind: building a machine

• Articulating Jib Cranes

rotation on inner arm and 360° rotation on the outer arm. BossBuyer Articulating Jib Cranes offer lower headroom than any other brand of articulating jib cranes. Bridge mounted articulating jib cranes offer lower headroom than those of other Manufacturers as well and can support nearly any type of manipulator, balancer, or hoist. BossBuyer Articulating Jib Cranes are designed using a 15% factor for weight of hoist unit and a 50% impact factor. All BossBuyer Articulating Jib Cranes are designed

• Wall Traveling Jib Cranes

continue lifting material without waiting for a larger overhead crane to become available. BossBuyer Wall Traveling Jib Crane end trucks use channel beam/construction frames to resist twisting and are jig-fixtured and machined to maintain consistent Manufacturing tolerances. The top running end truck on a wall traveling jib crane utilizes forged steel double flange crane wheels for long life. The BossBuyer Wall Traveling Jib Crane drive utilizes a squirrel cage motor with a double reduction spur gear

• Bottom-Slewing Tower Cranes Structure and Configuration

in line with the limited height of the crane and, even more so, with its rapid self-erecting concept. The operator cab is traditionally located at the top of the mast, or the crane can be operated from a control post at the lower part of the mast. Many new models now offer a dimbing cab that can move along the mast for optimal view (Figure 19.17b). Wireless radio remote control of these cranes is now offered on most models. Masts are either lattice (Figure 19.16) or hollow section (Figure 19.17).

• Wind and Tower Cranes

Like most mobile rigs, self-erecting cranes can fold up on short notice. All other tower cranes must ride out severe storms. That requirement has induced engineers to identify two principal classes of load combinations gerMane to the design of these machines: hi-service loads act on the crane in operation, and out-oj-service loads occur under the influence of high winds when the crane is unmanned. Some cranes have an additional load case that applies only when the crane

• Classification of Crane Anti-sway devices

is measured with a camera connected to an image processing system, active open loop systems where the information is obtained without additional sensors, from the information available. The first system entails mechanical complexity and perManent maintenance. The second requires costly auxiliary systems and case by case adjustment. The third is by far the simplest and the easiest to implement. The Anti-Sway solution, provided by Schneider Electric, belongs to this last category. It provides

• Active Sway Suppression Techniques of a Gantry Crane System

a gantry crane is transporting the load as fast as possible without causing any excessive sway at the final position. Research on the control methods that will eliminate sway angle of gantry crane systems has found a great deal of interest for Many years. Active sway angle control of gantry crane consists of artificially generating sources that absorb the energy caused by the unwanted sway angle of the rope in order to cancel or reduce their effect on the overall system. Lueg in 1930 (Lueg,

• Rule about marking rated capacity of crane

shall be legibly marked on each side of the crane. Markings shall be legible from the ground or floor. Each load block of the hoisting units of the crane shall be legibly marked with its individual rated capacity. (2) Each crane designed and Manufactured after January 1, 1971 shall have a service class rating as prescribed in “CMAA #70--Specifications for Top Running Bridge and Gantry Type Multiple Girder Electric Overhead Traveling Cranes,” 1970 edition, as shown in Appendix

• YJCrane Gantry Crane

The gantry cranes that lift your productivity. YJCrane is a company that has always cared about engineering and Manufacturing practical, robust, and durable lifting solutions. For more than 20 years, we have been innovating our equipment with thoughtful, customer requested capabilities. We have been able to do this because we listen to our most important advisors,

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