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Thursday, March 28, 2013
Ken DeLoria
03/28/13 11:49 PM,
This is the first in a series of articles about how to safely rig, fly, suspend, attach, or otherwise elevate loudspeakers and associated sound equipment above the level that gravity intends; i.e. the ground. The information we’ll be presenting is equally applicable to professionals who are touring or working with rental systems - and to those who are engaged in permanent installations. While the means, methods, and techniques may vary a bit from rental to permanent install work, the principals…
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Andrew T. Martin
03/28/13 11:20 AM,
What happens if a piece of suspended rental equipment is put in service and falls from its rigging, resulting in damage to the property, as well as to the technician installing it and perhaps even several other crew members? Besides destroying the rental equipment, there is a high probability that a lawsuit will follow. If you’re the unfortunate soul owning the piece of equipment that failed, you can count on being the primary defendant in the complaint. It’s at this…
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Thursday, February 14, 2013
Bill Sapsis
02/14/13 05:05 PM,
Motorized winches. Lift machines. Line shaft winches. Cable drum winches. Whatever you want to call them, they’re everywhere these days, with more coming. To ride the wave, however, a lot more understanding has to be brought on board. (Get it? Wave…board?) Winches that are designed to lift scenery, lighting or other heavy stuff is what we’re talking about. Please don’t confuse them with machines used for opening and closing curtains on traveler tracks. They are a whole different animal and…
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Wednesday, February 13, 2013
Craig Leerman
02/13/13 06:54 PM,
We don’t often think of concert and event production as being a dangerous profession, but far too many accidents and injuries - and sometimes even deaths - occur each year in our chosen profession. Most of these accidents are caused by human error and can be avoided if we simply pay attention to what we’re doing and follow basic safety rules. Here are a few things (and more) to keep in mind: • Always wear eye protection when using tools…
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Thursday, January 17, 2013
Ken DeLoria
01/17/13 10:17 AM,
“Don’t go breaking my heart” —Elton John & Kiki Dee Whether it’s a shackle, a hoist, a crane, or a beefy fly frame, never forget that everything breaks. The only question is under what load and under what conditions. To address this issue, the rigging industry has adopted the term “SWL,” which stands for Safe Working Load. You might also see “WLL,” which stands for Working Load Limit. When you purchase a shackle, a pairing ring, or a length of…
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Thursday, December 06, 2012
Bill Sapsis
12/06/12 05:02 PM,
Stage rigging involves machinery. The various components of the system move and, because of that movement, the parts of the system will eventually wear out. That is the primary reason for having your stage rigging inspected. If that’s not motivation enough, there are several other reasons for an annual safety inspection. The people using the equipment may not know how to operate it properly, and therefore may cause damage to some of the parts. The equipment may not have been…
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Wednesday, November 28, 2012
Craig Leerman
11/28/12 11:37 AM,
Recently a young person asked me about my work, and as I explained some of the various aspects, it triggered something in my brain. I realized that I had actually just barely scratched the surface in terms of telling him about the wide range of responsibilities that many of us have. For example, we’re regularly involved with sales before the show (and often during and after). From simply speaking to clients about their needs, to putting bids together, to being…
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Friday, November 23, 2012
Ken DeLoria
11/23/12 12:11 PM,
I began writing this series of rigging safety articles several months ago motivated by the many dangerous practices I’ve seen over the years. (See part 1 and part 2.) These disasters-waiting- to-happen lurk in clubs, small shows, medium shows, and sizeable temporary events. This past summer, we have witnessed staging/rigging tragedies in Canada, Indiana, and Belgium. The common element in each of these truly unfortunate incidents are media reports of extreme weather conditions. There’s a very human tendency to believe…
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Thursday, October 18, 2012
PSW Staff
10/18/12 09:20 AM,
Excerpted from JBL Professional Technical Note Volume 1, Number 14: “Basic Principles for Suspending Loudspeaker Systems.” Design Factor Design factor is a term used by the rigging industry to denote theoretical reserve capability. The rated capacity / of all lifting and hanging equipment b based upon the nominal strength of the equipment reduced by the design factor. Design factor is a number representing the fraction of equipment nominal strength chosen to be appropriate for the particular application. Rated Capacity =…
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