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  1. Simmers

    AC hp needed to replace DC bridge crane drive?

    eeinpa How did your project turn out? CMAA standards would be helpful . . . http://www.mhia.org/ This is a challenging issue. Crane engineering companies could be helpful too.
  2. Simmers

    Hoist/Crane Checklist

    ASME B30.16 covers hoists . . . $59.00 ASME B30.2 covers cranes . . $58.00 www.asme.org Any reputable crane company can also help. ;)
  3. Simmers

    Hoist Runway Mainline Disconnect

    Consult NEC Section 610.31 thru 610.33: It's very clear there and is recognized by OSHA. The runway disconnect must be readily accessible from the floor, capable of being locked open (all ungrounded conductors) and placed within the view of the runway conductors (AND LABELED PROPERLY)...
  4. Simmers

    Jib Crane Bearings

    there are inexpesive, pre-engineered supports for jibs Go to www.gorbel.com or www.spanco.com
  5. Simmers

    Hoist Maintenance Program

    If you have a variety of brands, it can be challenging. Otherwise check into an OEM's training assuming you have in-house maintenance. If you do not have manuals, you can get them on line from a variety of sources, get them and follow the OEMs recommendations. Keep in mind that reputable...
  6. Simmers

    crane application motor?

    There maybe options: All motions? Describe what you need?
  7. Simmers

    Anti-Sway Crane control

    If it is an AC crane, there is a drive manufacturer that has had this technology for many years and is very reliable. Steel mill cranes are often DC, if so, I know of no anti-sway technology electrically. Mechanical means by reeving is also an option, but normally only when starting from...
  8. Simmers

    Wound rotor motor

    Desirable motor rewind shops have a specification for VFD rewinds. We have used this spec successfully, but I would suggest that you have the motor rewind shop tell you what they stand behind (warranty). MOTORS Existing Motors will be rebuilt as follows (assumes windings are adequate - advise...
  9. Simmers

    Upgrading Existing Hoists/Bridge Cranes with Spark-Resistant Component

    I'm new to this forum but in case you still are in need . . . . 1. I would talk to the OEM. Normally it is a plant by plant issue and your insurance company may have an opinion too. 2. Normally this is addressed when the initial purchase was made, but I hate to assume. Div 2 locations ...
  10. Simmers

    Incoming feeder capacity for crane load ( Variable loads )

    The NEC provides their recommendation for calculating motor loads for multiple cranes. Article 610. We use this exclusively.
  11. Simmers

    Bridge Crane Manufacturers who will repond?

    Texas crane builders would not have a problem helping you. Gaffey, Proserv would be a great start. Sometimes air, in lieu of electric, is the answer in hazardous areas.

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