Bridge Crane With Hand Geared Bridge Trolley and Hoist 10 Toon
Types of Overhead Span Cranes
Overhead cranes are used to move extremely heavy or bulky loads through the overhead space in an industrial facility. Their use conserves infinite on the floor and leaves aisles clear, unlike a forklift or other textile lifting device. Overhead cranes lift, lower and motion a load horizontally, directed past an operator either manually or with wireless controls. They tend to have low maintenance costs comparatively and have the most lifting height for higher vertical stacking and efficient use of space. Operator safety is ensured due to lack of obstacles in the way to run into.
Ace Industries designs and manufactures overhead cranes for all types of applications, from uncomplicated work stations to sophisticated custom lifting systems.
Single girder crane: An overhead traveling crane that utilizes a single bridge axle attached to the ii runway/finish trucks. This bridge beam or unmarried girder supports a lifting mechanism or hoist that "runs" on the bottom flange of the bridge beam.
Double girder crane: An overhead traveling bridge crane that utilizes two span beams set atop the runway (end) trucks. More often than not this blazon of crane utilizes a top running trolley hoist which moves along the top of the ii bridge beams on its own set of trucks/trolley wheels. The hook from the hoist "falls" between the two bridge beams. Headroom under the crane is increased past utilizing this hoist/crane configuration.
Top running crane: An electric overhead traveling crane having the end trucks supported on rail attached to the top of the crane runways.
Under running crane: An electric overhead traveling crane having the end trucks supported on track attached to the bottom flanges of the beam; or supported on bottom flanges of beams. These beams make upward the crane runway.
Peak Running Single Girder Crane
- Capacity: ½-xv tons
- Span: 10'-60'
- Hoist & Trolley operates on the lower flange of the bridge beam.
- End Trucks operate on the top of crane runway.
Under Running Single Girder Crane
- Capacity: ½-15 tons
- Span: 10'-60'
- Hoist & Trolley operates on the lower flange of the bridge beam.
- End Trucks operate on the lower flange of the runway beam.
Top Running Monobox
- Capacity: iii-15 tons
- Span: 55'-100'+
- Hoist & Trolley operates on the lower flange of the Monobox Bridge.
- End Trucks operate on the top of crane rail.
Acme Running Double Girder Crane
- Capacity: 5 tons and Up
- Span: 10'-100'+
- Hoist & Trolley operate on top of double girder bridge.
- Terminate Trucks operate on summit of crane rail.
Top Running Double Box Girder
- Capacity: five tons and Upwardly
- Bridge: 50'-100'+
- Hoist & Trolley operate on meridian of double girder bridge.
- Terminate Trucks operate on top of crane track.
Types of Runways
A Runway is the assembly of rails, girders, brackets and framework on which the crane operates. The crane blazon will dictate whether the stop trucks ride on the top of the runway rail or on the lesser flange of the track beam. The runway design and ASCE rail size utilized will decide the feasibility of adding hereafter cranes and costs associated for increasing the chapters of an existing runway. Runways should be installed per CMAA runway specifications and tolerances.
Runways that are non installed per CMAA runway specifications or are misaligned due to clothing and tear may crusade premature cycle wear and other crane & component issues. An engineered rail survey is recommended, if yous take abnormal wheel vesture, span skewing, loud scraping sounds or other indications of a potential runway problem. Below is a cursory description of types of runways and components.
Runway System using Sister Columns & Tied Dorsum to Building
- Building is able to support lateral loads from runway organization.
- Our standard tieback is a bolted flexible tieback pattern vs. rigid tiebacks.
- Flexible tiebacks allow the tie dorsum to flex.
- The runway deflects and vibrates as the crane travels.
- Rigid tieback welds are put under repeated fatigue loading.
- The bolted flexible tieback is highly recommended for larger capacity systems.
- Longitudinal bracing is STANDARD on all of Ace|Gaffey Crane systems.
Runway on Haunches
- Haunches or Secondary Columns mount directly on building columns.
- Building pattern must be able to support crane loadings.
Costless Standing Track Arrangement
- Used if edifice cannot support any loading and footers may be required.
- Requires more steel to fabricate vs. a system that can be tied back.
- Ace|Gaffey uses Moment Columns vs. A Frame Columns.
- Moment Columns use the foundation to back up and stabilize the system.
- No bracing is needed, more steel in the column than a system tied to edifice.
- A-Frame columns may be less expensive, just take upwards more space.
- Longitudinal bracing is STANDARD on all Ace|Gaffey Crane systems.
Moment Columns
- Footer takes lateral and longitudinal loads imposed on the system.
- Takes up minimal floor space.
- Larger footer blueprint.
- Increases the price of the system, but the best choice for columns.
Ceiling Mounted
- Mounted to building trusses or other support structure.
- Longitudinal bracing required on both sides.
- Lateral bracing required-1 side only.
- Building and roof truss design may limit options.
Rail
- Hot rolled steel the crane travels on.
- Subject to very high stresses.
- Rail size may vary depending system capacity.
- Attachment options: J Bolts, Weld on and Bolt on Clips.
End Trucks
End Trucks ride on the runway rail and motion the bridge crane. There are ii main designs:
Stock-still Axle
- A fixed axle has an exposed gear on the bicycle.
- Requires maintenance to continue the exposed gear lubricated.
- Fixed beam terminate trucks are course C Duty cycle.
Rotating Axle
- A rotating beam'southward wheel is directly driven by the motor through a gear box.
- Requires less maintenance.
- Rotating axle end trucks are class D duty cycle.
- Minimum of 10,000 hours of wheel bearing life.
Electrification Types
The vast majority of hoists and cranes are powered by electricity. Electrification components of hoist and crane systems are relatively uncomplicated in application. In that location are two circuits in most hoist electrification systems: Ability and Control. The power circuit provides the free energy to lift loads and run other motors. The control circuitry activates the devices that turn the primary motors on and off. The control circuit operates at lower voltage and current than the power or primary circuit.
Rigid Bar
Uses:
- Whatever length
- Moderate to Expensive
- Tin handle multiple hoists
- Tin can negotiate curves.
Potential Concerns:
- Voltage drop on long runs
- Requires hangers every five (5) feet
- Collectors & bar require replacement over fourth dimension
Festoon
Uses:
- Medium length (under 100')
- Moderately expensive
- Very footling maintenance
Potential Concerns:
- Long runs put stress on cable
- Large cable requires heavy duty rail and trolleys
- Tin handle 2 hoists maximum on one track
- Requires hangers every v (5) feet
Cable Reel
Uses:
- Brusk length (under 50')
- Relatively inexpensive
- Merely a reel hangar is required.
Potential Concerns:
- Limited on length
- Cable sag
- Reel spring can pull manual trolleys
- Must accept slip ring for 360 degree rotation.
Controls and Variable Frequency Drives (VFD's)
Pendant Command Stations
Ace|Gaffey offers a large variety of pendant stations. 2, four, half-dozen, 8, 10 and 12 button pendant stations are in stock and usually send the same day. Pendant Control Stations can be wired into the hoist, trolley or bridge. They are an economical solution for operating a crane, but most customers prefer a Radio Remote Control arrangement for crane operator safety reasons. Pendant Control Stations can be installed on a crane system as a secondary command option, when a Radio Remote Control is installed.
Radio Remote Controls
Ace|Gaffey offers and stocks a variety of Radio (wireless) Controls. Radio Remote controls should e'er be considered, considering they permit the operator freedom from the load. A Radio Remote Control organisation is 2 transmitters, i charger unit and a receiver unit. An audible or visual warning device must exist installed on a traveling span crane, if a Radio Remote crane control organization is installed. The reliability of Radio Remote Controls has increased over the years and the cost associated has decreased.
Variable Frequency Drives
A Variable Frequency Bulldoze (VFD) organization controls the rotational speed of an alternating current electric motor. VFD's enable the crane operator to meliorate control the load with softer starts and programmable controlled acceleration and deceleration. A VFD allows the operator to perform precision placement and lifting of the load.
Powered Hoists - Chain
Suspensions
- Hook
- Button or Motor Driven Trolley
Standard Options
- Lift Changes
- Lift (Trolley) Speed
- Two Speed Control
- Voltage
- Chain Container
- Beam Size for Trolleys
Custom Options - Electrical
- Explosion Proof
- Special Command Enclosures
- Mainline Disconnect
- Branch Circuit Fusing
- Thermal Overload Relays
Custom Options - Mechanical
- Epoxy Paint
- Spark Resistance
- Corrosion Resistance
- Weatherproofing
- Nutrient Class Lubrication
- Mechanical Overload Protection
- Stainless Steel Concatenation
- Stainless Steel or Bronze Trolley Wheels
- Trolley Safety Lugs (Drop Stops)
- Curved Runway Performance
Powered Hoists - Wire Rope
Suspension Type (Trolley Only)
- Push
- Manus Geared
- Motor Driven
Standard Options
- Elevator Changes - Unlike Drum Sizes
- Lift (Trolley) Speed
- 2 Speed Control
- Voltage
- Beam Size for Trolleys
Custom Options - Mechanical
- Curved Rails Performance
- Epoxy Paint
- Spark Resistance
- Corrosion Resistance
- Weatherproofing
- Food Grade Lubrication
- Mechanical
- Overload Protection
- Stainless Steel Wire Rope
- Stainless Steel Trolley Wheels
- Trolley Safety Lugs (Drop Stops)
Custom Options - Electrical
- Explosion Proof
- Special Command Enclosures
- Mainline Disconnect
- Branch Circuit Fusing,Thermal Overload Relays
- NEMA Rated
- Contactors
- Variable Frequency Drive Control
- Inching Control
- Electronic Overload Protection
- Motor Heaters
- Additional
- Limit Switches
Heir-apparent Tips for Bridge Cranes
Select the proper equipment for the awarding:
Choosing the lowest price crane bid without understanding the variances in equipment quoted, may consequence in additional long term maintenance costs to yous. Prior to compiling specifications for RFQ submittal, hither are some basic points to consider:
- What type of "Service" will the overhead crane be used for?
- What is the "Frequency" or how oft will the bridge crane exist used?
- What "Speed" of the bridge, trolley and hoist is necessary to friction match product efforts?
- Does the buyers' budget lucifer the specifications desired?
Why do minor changes in the length, width or meridian of a organization bear upon the overall cost?
Steel comes in standard lengths: Beams: 30', forty', 50' & 60' Angle: xx' & 40' Tube Steel: 40' & 48' Adding another foot of elevator or increasing the length of just i bay, could change the design and price.
Example:
| Original System: | |
| half-dozen Columns = 3 @30' | 30ft x 26lbs/ft. x $.75 lb. = $585 10 iii |
| iv Beams= two @40' | 40ft x 67lbs/ft. x $.75 lb. =$2010 ten two |
| Total Cost = $five,775.00 | |
| Modified Organization: | |
| half-dozen Columns = iii@twoscore' | 40ft 10 26lbs/ft. 10.75 lb. =$780 x 3 |
| two Beams = 1@50' | 50ft x 77lbs/ft. x.75 lb. =$2,887.50 |
| 2 Beams =1@forty' | 40ft x 67lbs/ft. x.75 lb. =$two,010.00 |
| Total Cost = $7,237.500 |
Additional Buyer Considerations:
- What are the long term maintenance costs associated with less expensive crane systems and components?
- Are replacement motors and other parts readily bachelor from multiple suppliers or just i?
- Does the crane provider see your company's minimum liability insurance requirements?
- Does the crane provider attach to all CMAA manufacturing guidelines and specifications?
- Does the crane provider have engineering and manufacturing capabilities or do they outsource these services?
- Are the replacement components readily available, to eliminate potential long lead times and increased costs?
- Does the crane provider accept their ain installation team or do they outsource installation?
- Not having a qualified crane company install the rails? Brand sure the runway is installed to come across the CMAA runway tolerance specifications. An improperly installed rails volition either filibuster installation of the span crane or create future problems and add boosted costs.
- Are you because whether or non you will be able to increase the capacity of the crane or add a 2nd span in the future? If so, verify if the runway axle size and rail quoted is adequate for future upgrades.
Crane Duty Bike Chart
| CMAA Class | Description | Explanation |
| Class A | Standby or Exceptional Service | This course normally includes installation and maintenance cranes. This equipment usually operates at slow speeds for precise treatment with long idle periods between lifts. Maximum chapters lifts are sometimes required. |
| Grade B | Light Service | This course of crane is used in repair shops, light assembly operations, service buildings, light warehousing, etc. Service requirement is light and speeds are irksome. Loads vary from none to occasional full capacity. Lifts per hour would range from 2 to 5, and average 10 feet per lift. |
| Grade C | Moderate Service | In terms of numbers, most cranes are built to meet Class C service requirements. This service covers cranes that may exist used in machine shops or paper mill machine rooms. In this blazon of service, the crane will handle loads that boilerplate 50% of the rated capacity with 5 to x lifts per hour averaging xv feet. Non over 50% of the loads at rated capacity. |
| Class D | Heavy Service | This service covers cranes which may exist used in heavy auto shops, foundries, fabricating plants, steel warehouses, container yards, lumber mills, etc., and standard duty saucepan and magnet operations where heavy duty production is required. In this type of service, loads approaching 50 pct of the rated capacity volition be handled constantly during the working period. High speeds are desirable for this blazon of service with 10 to 20 lifts per 60 minutes averaging xv feet, non over 65 percent of the lifts at rated capacity. |
| Grade E | Severe Service | This type of service is reserved for acme riding bridge and gantry blazon multiple girder electric overhead travelling cranes and requires a crane capable of treatment loads approaching rated capacity throughout its life. Applications may include magnet, bucket, magnet/bucket combination cranes for scrap yards, cement mills, lumber mills, fertilizer plants, container handling, etc.,with 20 or more lifts per hr at or almost the rated chapters. |
| Form F | Continuous Astringent Service | This type of service is reserved for summit riding bridge and gantry type multiple girder electric overhead travelling cranes and requires a crane capable of handling loads approaching rated capacity throughout its life. Applications may include custom designed specialty cranes essential to performing the disquisitional work tasks affecting the total product facility. These cranes must provide the highest reliability, with special attention to ease of maintenance features. |
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Bridge Crane With Hand Geared Bridge Trolley and Hoist 10 Toon UPDATED
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