‘Uncategorized’ Category

 

Case Study

The Challenge:

  • To provide our customer, a major construction equipment dealer, with a building supported overhead crane system for a new facility in Kentucky. The job incorporated two 10 ton single girder overhead cranes.

Special Consideration:

  • The general contractor needed design build capabilities for the overhead crane and runway systems. Single girder overhead cranes with low headroom hoists were utilized to minimize overhead crane and building steel costs.

Results:

  • The general contractor maximized the strength of the building while Crane-Tec supplied a complete overhead crane system and the owner maximized floor space. The overhead cranes were weight tested and turned over to the customer ahead of schedule.

For Immediate Results
Call 800-755-6378
CRANE-TEC.COM

 

Overhead Crane

Overhead crane

Overhead Crane

 

Overhead Crane Case Study

The Challenge:

  • To provide our customer, a leading trucking accessories supplier, with a complete design build of an under running 5 ton overhead crane system. The job incorporated the 5 ton overhead crane system and (2) ½ ton jib cranes.

Special Considerations:

  • The general contractor needed design build capabilities for the overhead crane and runway system. Crane-Tec provided complete design of the under hung runway system and incorporated it into the general contractors special overhead crane truss system.

Our Team Approach:

  • Our engineers, armed with building drawings, determined runway steel and hanger design. Engineered drawings with overhead crane loads were submitted to the general contractor for approval. Crane-Tec’s experienced field crew installed the complete system and jib cranes in under 3 days to meet the G.C.’s demanding schedule.

Results: 

  • The general contractor maximized the strength of the building while Crane-Tec supplied a turn key overhead crane system and the owner maximized floor space. The overhead cranes were ahead of schedule allowing the owner to set up manufacturing machinery with the use of the overhead crane.

 

Case Study

The Challenge:

  • To provide our customer, a leading forklift manufacturer, with a complete under running 12 ton overhead crane system. The job incorporated the 12 ton runway system and four under running overhead cranes.

Special Considerations:

  • The customer needed design build capabilities for the overhead crane and runway system. Crane-Tec provided complete design of the under hung runway system and incorporated it into the customers metal building.

Our Team Approach:

  • Our engineers, armed with building drawings, determined runway steel and hanger design. Engineered drawings with loads were submitted for approval. Crane-Tec’s experienced field crew installed the complete system and overhead cranes in under 4 days, allowing the customer to use the equipment in the installation of new machinery.

 

Job History: 5 Ton Crane Syetem

5 Ton Overhead Crane

The Challenge:

  • To provide our customer, a major wire manufacturer, with multiple free-standing overhead crane systems for a new manufacturing facility. The job incorporated a 5 ton capacity free-standing runway system and (2) 5 ton top running double girder tie-back runway systems.

Special Consideration:

  • The general contractor needed design build capabilities for the overhead crane and runway systems. Existing building height limitations requires use of both single girder and double girder overhead crane systems, both with custom low headroom hoists.

Our TEAM Approach:

  • Our engineers, armed with the metal building drawings, determined runway steel locations and sizes. Engineered drawings with loads were submitted to the general contractor for approval.

For Immediate Results
Call 800-755-6378
WWW.CRANE-TEC.COM

 

Insulated Safety Bar

Over the last few years, many new insulated type safety electrification systems have been developed. All of these systems provide a safe means for bringing power to hoists and bridge cranes.

  • The Enclosed Duct Type:  Has two or more conductors inside a square metal track, or individual insulated bars of galvanized steel, copper, or aluminum. These bars are completely enclosed with an insulated shield which has a split on the front edge. A set of collector shoes on the passing crane or hoist equipment bears firmly against the electrification bar and virtually opens the insulated jacket which springs closed again as the equipment passes. This type of electrification can be used for straight or curved requirements.

To accommodate for icing and extreme climate problems, sheet metal covers can be placed over the bars for weather protection and high temperature jackets are available in most situations. The duct type systems are considerably more expensive, utilizing a multiple collector trolley riding inside the square duct. It is a sturdier system and generally offers good weather protection for outside installations. By far the most popular style of insulated system used by crane manufacturers is the individual insulated bar.

 

FESTOONING ELECTRICIFICATION

Festooning (looped wire) cable systems are simple and inexpensive types of available electrification and offer a relatively trouble free method of bringing electric power to moving equipment. Typically, the only problem with festooning is that the hanging loops could tangle with obstructions or interfere with lifts if installed in areas with low ceilings. Modern festooning systems are normally designed so these possible trouble areas can be eliminated. Festooning systems are an exceptionally valuable system when extensive electrification is required to accommodate numerous push button stations in a pendant control suspended from the crane hoist.

The systems are also extremely effective in high moisture areas or where chemical fumes are present. Festooning may be the only type of electrification that can be used for these applications.  Festoon systems are not recommended for long runways and are generally used for travel lengths limited to 60 feet. Also, festooning wire suspended from a small track and trolley system can be extended for usage up to 150 feet.

 

Bare Wire Electrification

The most popular system presently on older bridge cranes is bare, hard drawn, copper wire although it is rarely provided today on new equipment. Local electrician codes prohibit their use except under specific conditions.  These systems are installed by a number of hard drawn solid copper or aluminum wires being stretched along the sides of the crane track or under the roof beams and held in place by insulated hangars. This system can only be insulated on straight runs.

For special applications where it is possible to isolate equipment and personnel from electrical lines or when extreme temperatures prevent the use of insulated types of electrification, bare wire can offer an excellent means of bringing power to the equipment.  These bare wires do present a very dangerous safety hazard for service personnel working on equipment or where metal bars, ladders, scaffolding  or other obstructions may come in contact with the lines.

 

Different Kinds of Electricification

Cord Reels are a very popular method of electrification systems for the smaller capacity hoists and cranes. They offer an inexpensive method of bringing power to moving equipment and most models permit installation in the center of the track to double the effective length of the cord reel cable travel.  Special reels are available for extreme lengths up to 500 feet or more and may be the only type of electrification for outside installation of Gantry cranes where standard overhead electrification systems have no method of support.

Large capacity reels with high amperage ratings, long lengths, or reels with many collector rings may be as expensive as more efficient conventional insulated conductor bar systems. Larger systems should be closely evaluated before choosing this type of electrification.  Contrary to popular usage, cord reels may not be desirable for light weight electric hoists mounted on push type trolleys. The spring tension of the reel can pull the hoist back, even with light loads. Moving the hoist on the track can also be a struggle against the pull of the reel, particularly when the cable is near its extended length.

 

Monorail Systems

Monorail systems allow exceptional versatility for in-plant handling from simple straight beams to complex curved and interlocking track configurations that can connect many shop and manufacturing areas together. The more complex systems are available with literally hundreds of options and require a study of your plant to best determine a design which will obtain optimum productivity in your application.

I-Beam System:

I-Beam systems are quite practical and relatively inexpensive for low production and simple plant layouts. Often a simple monorail beam will meet your lifting needs without going into the cost of a full area coverage crane system.

I-Beam systems are normally not used for curved and interlocking track applications. The primary advantage of an I-Beam versus Patent Track is the initial cost.

In high usage areas, the soft metal of the I-Beam lower flange will “peen-over” from the highly concentrated trolley wheel loads, resulting in difficulty in moving the trolley and eventually require replacement of the trolley and tracks.

Patent Track System:

Patent Track on the other hand, has precision hardened and ground flanges. Trolley wheels are individually suspended on articulating trunnions which assure equal wheel loading and provide much less effort to move heavy loads. These systems are ideally suited for high production applications. They are also suited ideally for integrated installations which require a crane mounted hoist for full area coverage to align with an interlocking monorail beam and deliver parts to remote assembly or storage areas.

It is possible with a monorail system to move loads down halls, around corners, up inclines, and even vertically lift entire hoist, load, and rail section between floor levels.
To obtain maximum usage of your plant potential, monorails should be seriously evaluated to interface with crane and fork lift operations.

For questions concerning monorails, contact Crane-Tec or call us at 800-755-6378.