Detailed Guide about Single Girder Eot Crane

This article is prolongation to blog post which gives the detailed insight about the Double Girder EOT Crane.

In this blog post, we will understand about the Characteristic, design & Advantage of Single Girder Eot Crane.

Single Girder Eot Crane is extensively used in engineering industries, large mills, railway and others

Design of Single Girder Eot Crane

As evident from the name, Single Girder Eot Crane consists of a single bridge girder supported on two end trucks. It has a trolley hoist mechanism that runs on the bottom flange of the bridge girder.

Below is typical figure of such type of crane

 

The main components of such cranes are bridge Girder, end trucks, bridge girders, runway, rail, hoist , trolley and buffer.

 

Advantages of Single girder eot crane

Þ        Single girder bridge cranes generally have a maximum span between 20 and 50 feet with a maximum lift of 15-50 feet.

Þ        They can handle 1-15 tonnes with bridge speeds approaching a maximum of 200 feet per minute (fpm), trolley speeds of approximately 100 fpm, and hoist speeds ranging from 10-60 fpm.

Þ        They are candidates for light to moderate service and are cost effective for use as a standby (infrequently used) crane.

Þ        Single girder cranes reduce the total crane cost on crane components, runway structure and building.

 

Single Girder Eot Crane

Factory Photo - Single Girder EOT Crane

Characteristics

Modern Single girder eot crane are available with following characteristics

 

Þ        Designed & manufactured in accordance with defined industry standards

Þ        Motors used are especially designed for crane duty and finds suitability in work area demands of frequent starting, reversing and braking

Þ        Motors available in totally enclosed dust proof construction

Þ        Gear boxes body fabricated using MS Plate

Þ        Presence of precision engineered hob cut helical / spur gears and pinions to deliver optimum usage

Þ        All gears & pinions running on anti-friction type ball/roller bearings in enclosed oil bath for providing constant splash lubrication

Þ        Designed for optimum wear resistance for smooth operations

Þ        Modular design electrical panel that is easy to install and maintain

Þ        Comes with provision of safety limit switches for all motions

Þ        Comes with primer paint and synthetic enamel paint finish for corrosion resistance

Þ        Available in different load capacities

 

Author

Shree krishna engg co has decade of experience in designing the various eot crane and Leading manufacturer of Single girder eot crane.

 

How to Select EOT Crane for your application

This video presentation shows , how you can select particular EOT Crane for your material handling application.



Author : SHREE KRISHNA ENGINEERING CO based in Ahmedabad, India is No 1 manufacture & Supplier of EOT Crane like SINGLE GIRDER EOT CRANE & DOUBLE GIRDER EOT CRANE

Double Girder EOT Crane Manufacturer

SHREE KRISHNA ENGINEERING CO is pioneer manufacturer & Supplier of inventive range of DOUBLE GIRDER EOT CRANE . This EOT Crane widely used in heavy construction work.







Features:

• Simple and precise design ensuring minimum dead weight, Wheel Load Headroom and easy to maintain
• Safe and reliable hoisting and traveling
• Higher efficiency to save power
• Fail safe type brakes (which are applied when power supply is off and release when power supply is on.)
• All motion are protected with limit switches
• Rubber buffers are provided to extra protection against collision in case of limit switch failure
• Dustproof panel box with reputed make switch gear or as per customers' approval
• 110 V Control voltage selected for protection of Crane operator against any electrical shock
• With electrical Interlocking to prevent simultaneous operation of opposite motion
• Available with Radio remote Control operated type
• Available in Class-I, Class-II,Class-III, and Class-IV, Duty
• Designed as per Indian Standard IS 807&; IS 3177
• These are designed especially with mechanical means for Traveling in both directions and raising and lowering a load by electrical
• Our product consists of structures, wheels, gearboxes, wire rope, electrical motors, panels and hooks assembly and are known fore their higher efficiency which in turn saves power.

Specifications:

• Provides for higher hook lift as hook can be pulled up between two main girders
• Used for lifting as well as meeting transporting needs of materials of any capacity/span
• Travel on gantry girder on fix column requiring heavy capacity and wide spans
• Can be offered in different ton capacities with desired span
• Can be made available in different lifting capacity

Range of Single Girder Eot Crane Manufacturer

SHREE KRISHNA ENGINEERING CO ,Ahmedabad is Manufacturer & Supplier of Single Girder EOT Crane for Industries like engineering industries, large mills & railway etc



Features:



Salient Features of Single Girder eot crane is as below

• Designed & manufactured in accordance with defined industry standards
• Motors used are especially designed for crane duty and finds suitability in work area demands of frequent starting, reversing and braking
• Motors available in totally enclosed dust proof construction
• Gear boxes body fabricated using MS Plate
• Presence of precision engineered hob cut helical / spur gears and pinions to deliver optimum usage
• All gears & pinions running on anti-friction type ball/roller bearings in enclosed oil bath for providing constant splash lubrication
• Designed for optimum wear resistance for smooth operations
• Modular design electrical panel that is easy to install and maintain
• Comes with provision of safety limit switches for all motions
• Comes with primer paint and synthetic enamel paint finish for corrosion resistance
• Available in different load capacities

Versatile EOT Crane Manufacturer

Characteristic, Design & Advantage of Double Girder Eot Crane

This article is prolongation to blog post which gives the detailed insight about the Type of EOT Crane.

Double Girder Eot Crane is extensively used in framework of large building, bridges and many more construction process. It finds wide application in heavy engineering industries like steel, machinery, automobile manufacturing, docks, railway stations, units.

Design of Double Girder Eot Crane

As name suggest , Double girder eot crane consist of two bridges girders supports on two dead end truck and trolley generally run on rails.

Below is typical figure of such type of crane

The main components of such cranes are bridge , end trucks , bridge girders ,runway , rail ,hoist , trolley and buffer.

Advantages of double girder eot crane

Þ        They are faster with maximum bridge , trolley and hoist speed up to 350 , 150 and 60 feet per minute respectively

Þ        They can work in continuous severe service area

Þ        Can lift up to 110 tons.

Þ        Highly adaptable where Crane required to fit along with walkways ,cabs and cable reels or any specialize equipment.

Characteristics

Modern double girder eot crane are available with following characteristics

Þ        Simple and precise design ensuring minimum dead weight, Wheel Load Headroom and easy to maintain.

Þ        Safe and reliable hoisting and traveling

Þ        Higher efficiency to save power

Þ        Fail safe type brakes (which are applied when power supply is off and release when power supply is on.)

Þ        All motion are protected with limit switches

Þ        Rubber buffers are provided to extra protection against collision in case of limit switch failure

Þ        Dustproof panel box with reputed make switch gear or as per customers' approval

Þ        110 V Control voltage selected for protection of Crane operator against any electrical shock

Þ        With electrical Interlocking to prevent simultaneous operation of opposite motion

Þ        Available with Radio remote Control operated type

Þ        Available in Class-I, Class-II,Class-III, and Class-IV, Duty

Þ        Designed as per Indian Standard IS 807&; IS 3177

Þ        These are designed especially with mechanical means for Traveling in both directions and raising and lowering a load by electrical

Þ        Our product consists of structures, wheels, gearboxes, wire rope, electrical motors, panels and hooks assembly and are known fore their higher efficiency which in turn saves power.

Author

Shree krishna engg co has decade of experience in designing the various eot crane and pioneer manufacturer of double girder eot crane.

Top 11 ESSENTIAL PARAMETERS FOR SPECIFING EOT CRANE

EOT crane are widely used in range of material handling application. Selection of EOT Crane is quite cumbersome. To select correct EOT Crane envelope that will fit in the building foot print, the user must identify and pass on the following key information to the supplier:

1)         Crane Capacity * - The rated load, the crane will be required to lift. Rated load shall mean the maximum load for which a crane or individual hoist is designed and built by the manufacturer and shown on the equipment identification plate.

2)         Lift Height - The rated lift means the distance between the upper and lower elevations of travel of the load block and arithmetically it is usually the distance between the beam and the floor, minus the height of the hoist. This dimension is critical in most applications as it determines the height of the runway from the floor and is dependent on the clear inside height of the building. Do not forget to include any slings or below the hook devices that would influence this value.

3)         Runway Height – The distance between the grade level and the top of the rail.

4)         Clearance- The vertical distance between the grade level and the bottom of the crane girder.

5)         Clear Span- Distance between columns across the width of the building. Building width is defined as the distance from outside of eave strut of one sidewall to outside of eave strut of the opposite sidewall. Crane Span is the horizontal center distance between the rails of the runway on which the crane is to travel. Typically distance is approximate to 500mm less than the width of the building. How much span a crane requires depends on the crane coverage width dictated by the application. (According to the span and the maximum load handling capacity, the crane steel structure is selected to be either a single or double girder crane construction).

6)         Building Height- Building height is the eave height which usually is the distance from the bottom of the main frame column base plate to the top outer point of the eave strut. Eave height is the distance from the finished floor to the top outer point of the eave strut. There must be a safety distance between the top edge of the crane runway rail and the first obstacle edge in the building (for example roof beams, lights and pipes).

7)         Runway Length- The longitudinal run of the runway rail parallel to the length of the building.

8)         Hook approaches - Maximum hook approach is the distance from the wall to the nearest possible position of the hook. The smaller the distance is, the better can the floor area be utilized. Always check which crane gives optimum hook approaches and when combined with the true lift of the hoist you can utilize most of the available floor space. This is also termed as side hook approach.

End Approach – This term describes the minimum horizontal distance, parallel to the runway, between the outermost extremities of the crane and the centerline of the hook.

9)         Bridge, Trolley and Lift Speeds - The rate at which the bridge or trolley travels or at which the hoist lifts is usually specified in feet per minute or FPM. The crane operating speeds are selected to allow safe operation whilst using the pendant. Dual operating speeds, normally a fast and slow speed with a ratio of 4:1 are commonly used but for optimum control a variable speed control system is strongly recommended.

10)      Electrical Requirements - Specify the circuit voltage shall not exceed 600 volts for AC or DC current. Ideally 480 volt, 3 phase, 60 hertz for US requirements. The runway power is usually by conductor bar and hoisting trolley by festoon cable. (refer section 6 for details)

11)      Control Requirements - The control circuit voltage at pendant pushbuttons shall not exceed 150 volts for AC and 300 volts for DC. Other control options including radio control, free-floating pendant (festooned) or hoist-mounted pendant requirements must be stated.

  

Other than addressing the above parameters, some specific conditions applicable to your application must be mentioned.

1)     Do you need the use of a second hoist on the bridge crane? (This hoist may be used as an auxiliary hoist or be required in a process such as tilting/tipping. In case you are handling long materials, like steel tubes and plates, the best solution are to have a crane with two hoists (and hooks) for better stability of the load ensuring safe lifting).

2)     What will the operating environment be (dust, paint fumes, outdoor, etc.)?

3)     Is there existing cranes on the runway? Then, consider the use of a collision avoidance or collision warning system.

TYPES OF EOT Crane (ELECTRIC OVERHEAD CRANES)

There are assortments of types of overhead cranes with many being extremely specialized, but the vast majority of installations fall into one of three categories: a) Top running single girder bridge cranes, b) Top running double girder bridge cranes and c) Under-running single girder bridge cranes. EOT Crane full name is Electric Overhead Traveling crane which come in various types:

1)    Single girder cranes - The crane consists of a single bridge girder supported on two end trucks. It has a trolley hoist mechanism that runs on the bottom flange of the bridge girder.

Single Girder EOT Crane

2)    Double Girder Bridge Cranes – This type of EOT crane consists of two bridge girders supported on two end trucks. The trolley runs on rails on the top of the bridge girders.

Double Girder Eot Crane

3) Gantry Cranes - These cranes are essentially the same as the regular overhead cranes except that the bridge for carrying the trolley or trolleys is rigidly supported on two or more legs running on fixed rails or other runway. These “legs” eliminate the supporting runway and column system and connect to end trucks which run on a rail either embedded in, or laid on top of, the floor.

4)    Monorail - For some applications such as production assembly line or service line, only a trolley hoist is required. The hoisting mechanism is similar to a single girder crane with a difference that the crane doesn’t have a movable bridge and the hoisting trolley runs on a fixed girder. Monorail beams are usually I-beams (tapered beam flanges).

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SHREE KRISHNA ENGINEERING is poineer manufacture & Supplier of range of EOT Crane like SINGLE GIRDER EOT CRANE & DOUBLE GIRDER EOT CRANE