Jib Crane Why and How, Chinese Jib Crane

What’s a jib crane?

Jib crane is a kind of small and medium sized lifting equipment with unique structure. Its lifting system is fixed at the end of its arm or travel along the arm; its arm can rotate but can’t be lifted up.

Features of jib crane

• Jib crane have many good features like safety and reliability, high efficiency, energy-saving, and operating flexibly which can largely save manpower and work time.
• Jib crane can be operated easily in 3-D space. It can be used in many different sites of different industries and performs better than most of other common lifting machines in sites that requires short-distance and intensive lifting.
• The workload of jib crane is relevant low; usually its lifting capacity can be 16 ton at most.

General compositions of jib crane

It is composed of pillar, rotating arm, rotating driven system and electric hoist. The pillar is fixed on concrete ground with anchor bolt, and the arm is driven to rotate by cycloid gear reducer, the electric hoist travels horizontally on the steel I-beam of the arm and lifts up heavy load. The pillar of jib crane is a hollow steel structure with light dead weight, long span, heavy lifting capacity which is economic and reliable.

Why use jib crane

Lift and transfer: Dongqi Jib Cranes lift and transport loads in semi-circles and full circles with the jib rotating around the support around 200 degrees and 360 degrees.
Handle material at wherever you want:　Because of the jib boom, the handling tools such as manual and electric hoists, manipulators, balancers, and welding wire feeders, etc., can travel easily on trolleys along the boom. 

•  Save your working space to large extend:　The wall-mounted jib crane takes no floor space, which can save your working space.
•  Take advantages of what you have: On designing your crane, we will take full consideration your working conditions and lifting requirements. On some design, we can take the advantages of your building columns or overhead beams to mount the jib cranes, lowering your cost.
• Indoor/Outdoor application: Pillar jib cane also called free-standing crane can be used indoor and outdoor.
• Cooperate with your existing cranes: Jib cranes can work together with your overhead crane. The jib of jib crane can fold and stay out of the way of large overhead cranes.

How to choose your jib crane

A suitable jib crane can improve the efficiency of material handling and work flow production. How to choose the right jib crane for your application? Dongqi Crane gives you the follow suggestion for your reference:

Lifting capacity

The maximum weight of your application must not equal or exceed the weight of your crane. When defining your lifting capacity of your jib crane, it should be accounted in the following way:

• +15% for the weight of the hoist and trolley
• +15% for the deflection of hoist and trolley
• +25% capacity allowance for impact

Degree of Rotation

Pillar jib crane offers up to 360 degree rotation.
Wall mounted jib crane offers up to 180 degree rotation.

Outreach Range

The outreach range of jib crane refers to the distance from the boom tip to the crane hook, which also is the working area needed.

Crane Height

The height of jib crane has the attachments such as electrical entries included.

Under Boom Height

The under boom height refers to the distance from the floor to the underside of the boom, which will determine the type of hoist required.

Installation

Location of crane will decide the type of crane as the pillar jib crane needs concrete foundations which may cost more than the jib crane sometimes.

Dongqi Crane has 30 years of heavy lifting machines manufacturing history when jib crane remains to be the best selling products for a long time, and is well received by customers from all over the world for its all above advantages.

Main classification of jib crane

? BB Wall-travelling Jib Crane
Wall travelling jib crane lifting capacity: o.5-16t, Lifting height: 6-30m, Working class: A3.

Wall traveling jib crane 

? BZ Pillar Jib Crane
Pillar jib crane lifting capacity: o.5-5t, Lifting height: 1-10m, Working class: A3.

Pillar jib crane 

? BX Wall Mounted Jib Crane
Wall mounted jib crane lifting capacity: o.25-1t, Lifting height: 1-10m, Working class: A3.

 Wall mounted jib crane 

Jib Crane Applications 

1. The general applications scope and conditions of jib crane is as follow:

• Ambient temperature: -25℃ to + 40 ℃;
• Humidity ≤85%;
• Elevation below 1000m;
• Power is 3-PH, 380V, 50 HZ (The customized is available.)

2. The jib cranes from DQCRANES are widely used in the following applications:

• Jib cranes are widely used in workstations, storage, yard and other fixed or localized places, etc.
• Jib cranes are the choices for material handlings in short-distance or serried places, such as, transferring materials from one work cell to another.
• Jib cranes can be used to supplement a large overhead crane for material handling.
• Jib cranes can be used for suspension of tools
• Jib cranes also can be used for economical outdoor applications.
• Jib cranes are not allowed to be used in dangerous applications such as inflammable, explosive, and corrosive working environments, etc.

Tips on jib crane selection

How to choose the optimal jib crane for your application? How will the jib crane affect your working efficiency? How will it be used in daily operation? In order to answers these questions, the following factors have to be considered when select the jib crane for your applications:

• The conditions of your available structural support.
• Your anticipated requirements for the material handling equipment, the crane or the hoist.
• The features and advantages of each type of material handling equipment.
• The overall height and headroom height available.
• The cost of each type of jib crane.
• The overall cost of installation, training, maintenance, and after-sales services, etc.

Still don’t know how to choose? Don’t bother and hand the problems to DQCRANES, your material handling expert at your side. Free consultations may lower your crane purchasing costs. DQCRANES is here to lift you up! Contact us NOW!

Jib Crane Questions You May Ask

1. Can we mount our jib differently?

The only foundation mounting Dongqi Crane recommends is the one shown on the approval drawing supplied with the crane. A qualified person must determine the adequacy of any other method of mounting.

2. How critical is leveling and how accurate does plumb have to be with floor mounted jib cranes?

The vertical column of a floor mounted crane should be plumb. These cranes rotate very easily. With a load on the boom, if the column is not plumb, the boom may rotate by itself. In order to prevent unwanted boom rotation, it is beneficial to spend extra time ensuring the column of a floor mounted jib crane is plumb

3. How often is concrete poured accurately enough to merit not using a mortar bed? Alternatively, should it be standard practice to use a mortar bed?

Most installers will finish the concrete very flat and then bolt the jib crane column directly to the foundation. Our jib columns generally are very square because they are welded on a rotating semi-robotic jig. However, no weldment is perfect. The use of a mortar bed to correct any imperfections in the finish of the foundation or to plumb the jib crane column is perfectly acceptable.

4. What additional items do I need to mount the jib?

Floor mounted jibs require a concrete foundation with reinforcing steel rods and anchor bolts embedded in the concrete.

The wall-mounted jibs require high strength mounting bolts. These bolts must be no less than Grade 5 quality. The size is specified on the approval drawing and ranges from ? to ? inch diameter. Usually a minimum of a man-lift and a forklift truck are required to install the cranes. Large cranes may need additional equipment for installation.

5. Where is a wall jib mounted?

Wall mounted jibs must be mounted to a structure determined to be adequate by a qualified person. The thrust and pull forces given for each jib, the weight of the jib, the capacity, impact, and hoist weight are some of the factors that must be taken into consideration.

• What are the bolt/nut torque requirements for mounting?
• 1″ Mild steel anchor bolts/nuts or GR2 – 200 ft-lbs. max
• 3/4″ Mild Steel anchor bolts/nuts or GR2 – 150 ft-lbs. max
• 3/8″ Grade 5 bolts/nuts – 20 ft-lbs.
• 1/2″ Grade 5 bolts/nuts – 50 ft-lbs.
• 5/8″ Grade 5 bolts/nuts – 100 ft-lbs.
• 3/4″ Grade 5 bolts/nuts – 175 ft-lbs.
• 1″ Grade 5 bolts/nuts – 200 ft-lbs.

6. How are the jibs shipped?

Most jibs are shipped by a common carrier. They are usually shipped loose in a closed trailer with the hardware in a separate box. Some of the larger cranes require a flat-bed truck or trailer. Other methods are available. For an additional fee, units may be palletized to protect the finish.

7. Can I get the jib with motorized rotation?

Both wall mounted and floor mounted jib cranes can be fitted for motorized rotation.

8. Is the jib available in different colors or finishes?

Please contact us for details and pricing.

9. Can I use a jib outdoors?

Our standard jib cranes are designed for indoor use. We can provide special shielding on the jib for outdoor use. Special maintenance will be required for jibs used outdoors. Please contact us for details and pricing.

10. What government or industry standards apply to these jibs?

• Where Applicable:
• Occupational Safety and Health Administration, General Industry standards
• American Institute of Steel Construction
• American Society of Mechanical Engineers/American National Standard ANSI B30
• National Electric Code ANSI/NFPA 70
• American Welding Society AWS-D14.1 & D1.1
• What is the life expectancy of Dongqi jib cranes?

A jib’s life expectancy depends on the environment, the severity and frequency of use, the ambient temperature, and other factors. For this reason, we cannot provide a value for life expectancy. Dongqi jib cranes are designed for daily use, and with the exception of routine maintenance, should provide years of trouble free operation.

11. Does the capacity include the hoist weight?

The rated capacity of the jib is the maximum “live load” the jib can pick up. A typical hoist and trolley weight is assumed and added to the rated capacity for design purposes. These assumed weights are 15% of the rated capacity and are not considered part of the “live load”. However, hoist and trolley weights greater than 15% of the rated capacity should be considered part of the “live load”.

More on information on jib crane is at www.cranesdq.com

Videos on jib cranes is at our Youtobe channel: Crane & Hoist: Lifting Equipment Wikipedia