Page 56 - Wire Rope News & Sling Technology - December 2018
P. 56

Denny’s                                      Rigging Differently,
         crane and                                          an Awareness!
         rigging notes

                                                                   by Dennis O’Rourke

             ecades ago I learned that there were   using  a ten ton overhead crane  that   Shuttle was trucked in horizontally and
         Dserious differences in the skill nec-  he operates via a pendant station and   attached to the rocket vertically. To ac-
         essary for employees to properly attach   when landed, does his “thing.”  complish this 90-degree maneuver the
         loads to cranes at the ports or manu-  All he’s responsible for is to connect   Shuttle Erection Team (SAT) technician
         facturing plants (production rigging) as   the slings to the frame, hoist it and flip   used a specially designed lifting fixture.
         opposed to a building site (construction/  it  over.  What  could  go  wrong  –  if  he   Shuttle installation is an example of
         ironworker rigging) or in a paper mill’s   properly connects the frame?  production  rigging  using  specific  gear
         machine  shop  (millwright/maintenance   An accident performing just  about   having a 10 to 1 design factor, same
         rigging.) It hit me in the late 70’s when   the same hoisting operation as Den-  attaching points, repetitive lifts of the
         I started development and presenting   ny’s occurred in a Tool & Die shop at a   similar objects, and of the same weight/
         rigging programs for various industries   plant. The refinishing of the 12,800 lb   C.G. The SAT team had many techni-
         (DOE for one) which required a listing of   die requires lifting them using a crane,   cal procedures to perform before the
         topics and objectives for the courses.  rotated the die and sitting it down. This   “mating” took  place but, how  to pick
           Being schooled in “adult skills train-  is routinely done by one person; again   the Shuttle up with a “Yellow” lifting
         ing techniques” and what the instruc-  they  make  no  other  decisions  other   fixture at twice the capacity of the pay-
         tor is to accomplish (student perfor-  than attaching the slings and what   load with a 450 ton Coby bridge crane
         mance,) I recognized changes  in how   button on the pendent station to push.  located in the Vertical Assembly Build-
         we trained people for the work  they   However, on the night shift, a die   ing (VAB) was not one of them.
         were  doing,  “one  size  doesn’t  fit  all!”   wasn’t properly connected, and when
         Most programs were  based on Navy   lifted,  it  fell  hitting  the  technician.  He
         manuals. The book “Instructional Tech-  was working alone at the time. Does this
         nique” by Ivor K. Davies nicely lists the   work become so routine that one forgets?
         fundamentals for a basic program; this
         1981 book served my purposes.
           Production Rigging is the repeti-
         tive movement of the same type object                                                                  Photos courtesy of Dennis O’Rourke
         with the same gear in the same work
         environment. The loads can be truck
         chassis moved from the end of an as-
         sembly line ten times a day. Or, a ro-
         tor in a power plant move once a year,                                  The 100% perfect Lifting record at
         the duties of the people that attach the                              the VAB and not at the Tool and Die
         load, are the same.                                                   shop,  why?  The  skill  levels  between
           The people that attach load are not                                 Tool/Die Machinist and Mechanical
         usually called “riggers” but by their                                 Technicians are about the same, work
         skill  or  employment category.  What                                 experience and pay scale.
         are or what “are not” their load attach-                                “Familiarity breeds contempt” it is
         ing duties as compared to other indus-                                said by some. I don’t think there is a
         tries? Well, they don’t select or inspect                             build up of contempt in rigging, but
         the  rigging  gear  which  is  provided to                            there may be complacency!
         them, attaching points specified; don’t                                 Next paper is on Construction Rig-
         determine load  weight  or  center  of                                ging, with their set of circumstances. n
         gravity location;  or select where the                                  From the Author: Readers, these published
         load is coming from or going too. We                                  “Notes” are subjects that I have experienced over
         see that the actual moving of the ob-                                 the five decades I’ve spent in the Crane and Rig-
         ject is incidental to their overall duties,                           ging industry as a heavy equipment mechanic,
                                                                               safety engineer, business owner, and the for-
         thus, may be taken for granted.                                       mer president of Crane Certifiers Association of
           So, your guy “Denny,” has just been                                 America. This information was accumulated over
                                                                               that period. I would appreciate your comments,
         promoted to Mechanical Assembler III                                  additions, or corrections. These are the reflections
         and is placed at the last station of the                              and opinions of one person, on a serious subject.
         “line” to bolt critical struts connecting                               DENNIS J. O’ROURKE, CSP,,
         the axles to the truck frame. To accom-                               is the Director of National Crane Services, Inc. He has over
         plish this, he lifts the 2500 lb assembly   NASA attached the Space Shuttle to   fifty years’ experience in the industrial, maritime, and con-
                                                                               struction fields working with heavy equipment and material
         in  the  air  and rotates it 180 degrees   the external fuel tank about three times   handling devices. As a safety engineer, Mr. O’Rourke has de-
                                                                               veloped and/or presented over 300 safety-training programs
         and sets it on the alignment bench,   a year on average. The problem was the   for all representative elements of government and industry.
         56     Wire Rope News & Sling Technology   December 2018
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