Recent content by egilson1

  1. egilson1

    Rigging speakers overhead

    There will be soon. The technical standards program within ESTA is about to send out a document for its first public review related to statically suspended rigging. Once it goes out in a week or so I’ll post here. I’ve made the assumption the speakers will not travel up and down. If they do I...
  2. egilson1

    Hard Hats

    Like Mike Holmes, Canadian super builder says, “it’s a MINIMUM code”.
  3. egilson1

    I got hired for a 3 day job and the first day no one was there... advice?

    You showed up to work as you were scheduled. You are owed a minimum of some sort. Whether there is a state minimum or higher “industry “ minimum like 4 hours. Your time is worth something, and this was their error. Just my .02 cents
  4. egilson1

    Hard Hats

    Petzl Vertex with optional face shield. The reality is most people should be wearing a hard hat more often than we realize. Get something comfortable.
  5. egilson1

    College Decision

    If you can, visit the schools you want to apply too. Experience them for yourself. This may be the greatest way to help you make your decision. Disclaimer, I went to Emerson.
  6. egilson1

    Rigging with cable stops question?

    Sure there is. ASME B30.9. ANSI E1.4-1 - 2016, OSHA 3072 . They all lay out specific DF for the use of wire rope when used as slings and in running (as @BillConnerFASTC stated, that means going over a sheave) rigging.
  7. egilson1

    Rigging with cable stops question?

    We've been using stops for wire rope ladders for many years. As long as you de-rate the wire rope properly you're ok. The issue becomes will the hole in the wood resist the wear and tear of the wire rope and copper fitting? @BillConnerFASTC , the DF for non-running rigging is 1:5, not 1:8...
  8. egilson1

    Light fixture safety cables

    Also remember that the “shock load” equation is for an object in free fall. A chain running out of a bag is not in free fall, but rather at a changing velocity as the load changes, and as the length changes.
  9. egilson1

    Side-loaded Pipe

    Is it ideal? No. Is it going to cause a failure? Unlikely. I prefer long side arms as stiffeners so there is reduced strain on the lift line when attached.
  10. egilson1

    Tragedy in Boston

    For those who have not seen or heard, I lost a colleague and friend Saturday to a terrible accident. I’ve provided a link to a news article about what happened. I’m posting this not to start a discussion debating what went wrong, but to share the loss of a member of our community. I am also...
  11. egilson1

    Cable retraction device

    I seem to think this is correct.
  12. egilson1

    Sign hung issue

    Well, you’ve got 2.5 ton of load on an eye. A shoulder eyebolt at 0-45 degrees has a strength of 70% of the rated WLL. So we 8now the 2.5ton eye is out. What’s 70% of the 3ton? The 5ton?
  13. egilson1

    Sign hung issue

    Not quite. If the sign in the frame weights 350lbs, and we hung it on a single center point, that would be 350lbs in the middle of the 6’ frame. So the 6’ frame needs to support 350lbs at center. We know that a beam typically has a CPL of 50% of the UDL. So the top of your frame needs to be...
  14. egilson1

    Harry Donovan book question

    Step three you add 33000 and 4312.5 instead of subtracting them. If you subtract it works correctly.
  15. egilson1

    Harry Donovan book question

    Ok, thanks for the image. No, the total F2 force is not a negative number. There is 880lbs of force generated by the truss self weight. There is -115lbs of force generated by the cantilevered point load. When you add these together (the equation used simplifies this to strait subtraction) you...