ProSoundWeb Community

Please login or register.

Login with username, password and session length
Advanced search  
Pages: 1 [2] 3  All   Go Down

Author Topic: T Bar Wiring Project  (Read 7518 times)

Jamin Lynch

  • Hero Member
  • *****
  • Offline Offline
  • Posts: 784
Re: T Bar Wiring Project
« Reply #10 on: December 28, 2010, 03:34:42 pm »

Rob Timmerman wrote on Tue, 28 December 2010 12:30

Jamin Lynch wrote on Tue, 28 December 2010 12:43

Nice job. Looks very clean. I would suggest using lock nuts instead of wing nuts. The wing nuts always get loose for me. I added some eye bolts. They come in handy for hanging.

index.php/fa/34437/0/



30+ pounds overhead on an eyebolt that does not appear to be rated for overhead use?  




Oh give me a break. The whole thing is less than 30lbs. That's only 15lbs per eye bolt, they're 3/8" by the way. I'm comfortable with it. I'm not flying a line array with them.

I would feel less safe with the wing nuts than my eye bolts.
Logged

John Livings

  • Full Member
  • ***
  • Offline Offline
  • Posts: 163
Re: T Bar Wiring Project
« Reply #11 on: December 28, 2010, 04:17:35 pm »

Hi Jamie,

Do you have an image of the end that gets plugged in?

Regards,  John
Logged

Ray Cerwinski

  • Full Member
  • ***
  • Offline Offline
  • Posts: 136
Re: T Bar Wiring Project
« Reply #12 on: December 28, 2010, 10:20:00 pm »

Rob Timmerman wrote on Tue, 28 December 2010 13:30

Jamin Lynch wrote on Tue, 28 December 2010 12:43

Nice job. Looks very clean. I would suggest using lock nuts instead of wing nuts. The wing nuts always get loose for me. I added some eye bolts. They come in handy for hanging.

index.php/fa/34437/0/



30+ pounds overhead on an eyebolt that does not appear to be rated for overhead use?  




i agree, i'd feel more comfortable with a forged eyebolt.
Logged
Ray Cerwinski

Fennelli Design Group
www.eventfx.com

John Livings

  • Full Member
  • ***
  • Offline Offline
  • Posts: 163
Re: T Bar Wiring Project
« Reply #13 on: December 29, 2010, 02:46:06 am »

Below are some "Loads", Provided the bolt is "Rated".

When you order bolts the Company should list the items that are or are not Rated.

If they are not listed as rated, They probably are not rated.
A rated 3/8" eye bolt is good for 144# or 125# pound straight pull.

A "Forged" 3/8" eye bolt may be rated for 1000# or more, Or "Not Rated" at all.

2 X 144# pounds = 288# for a 30# light bar, Even if it is not Rated it will hold.
Of course nothing else is "Rated" on a do DIY project.

Putting together "Rated" parts does not make a finished project "Rated".

Having said to much, I would feel ok working under that rig, However
I am sure most designs could be improved upon, Even the "Rated" ones.

Regards,  John

index.php/fa/34450/0/
Logged

John Livings

  • Full Member
  • ***
  • Offline Offline
  • Posts: 163
Re: T Bar Wiring Project
« Reply #14 on: December 29, 2010, 02:47:22 am »

index.php/fa/34451/0/

Regards,  John
Logged

Milt Hathaway

  • Hero Member
  • *****
  • Offline Offline
  • Posts: 2181
    • http://www.fitzcosound.com
Re: T Bar Wiring Project
« Reply #15 on: December 29, 2010, 06:38:28 am »

John Livings wrote on Wed, 29 December 2010 01:46

Below are some "Loads", Provided the bolt is "Rated".

When you order bolts the Company should list the items that are or are not Rated.

If they are not listed as rated, They probably are not rated.
A rated 3/8" eye bolt is good for 144# or 125# pound straight pull.

A "Forged" 3/8" eye bolt may be rated for 1000# or more, Or "Not Rated" at all.

2 X 144# pounds = 288# for a 30# light bar, Even if it is not Rated it will hold.
Of course nothing else is "Rated" on a do DIY project.

Putting together "Rated" parts does not make a finished project "Rated".

Having said to much, I would feel ok working under that rig, However
I am sure most designs could be improved upon, Even the "Rated" ones.

Regards,  John


Thank you for the sane and informative response.
Logged
--
Milt
FitzCo Sound, Inc.
Midland, TX
http://www.fitzcosound.com

Jamin Lynch

  • Hero Member
  • *****
  • Offline Offline
  • Posts: 784
Re: T Bar Wiring Project
« Reply #16 on: December 29, 2010, 09:47:59 am »

John Livings wrote on Wed, 29 December 2010 01:46

Below are some "Loads", Provided the bolt is "Rated".

When you order bolts the Company should list the items that are or are not Rated.

If they are not listed as rated, They probably are not rated.
A rated 3/8" eye bolt is good for 144# or 125# pound straight pull.

A "Forged" 3/8" eye bolt may be rated for 1000# or more, Or "Not Rated" at all.

2 X 144# pounds = 288# for a 30# light bar, Even if it is not Rated it will hold.
Of course nothing else is "Rated" on a do DIY project.

Putting together "Rated" parts does not make a finished project "Rated".

Having said to much, I would feel ok working under that rig, However
I am sure most designs could be improved upon, Even the "Rated" ones.

Regards,  John

index.php/fa/34450/0/


Get real!! This is MORE than safe. It's a temporary hung light bar less than 30lbs total. You can throw out all the tech spec's you want, but I feel more than comfortable with it. I'll stand under it all day long. Find something else to try and pick apart. Like I said, I'm not flying a line array and there's no monkeys hanging from it. Yes, there is a time to use forged bolts...this isn't one of them. The bolts are rated way more than the light bar they are attched to. You're welcome to call out Ultimate Support on that.

According to your chart, I'm WELL within the load rating anyway.
Logged

Thomas Bishop

  • Sr. Member
  • ****
  • Offline Offline
  • Posts: 379
Re: T Bar Wiring Project
« Reply #17 on: December 29, 2010, 10:07:11 am »

I am not too worried about the eyebolts either, as long as they are fastened properly.  I am curious, however, why you chose eyebolts instead of clamps.  What are you typically rigging from and what goes between the eyebolt and point?  Shackles and spansets?
Logged

Jamin Lynch

  • Hero Member
  • *****
  • Offline Offline
  • Posts: 784
Re: T Bar Wiring Project
« Reply #18 on: December 29, 2010, 10:12:43 am »

Thomas Bishop wrote on Wed, 29 December 2010 09:07

I am not too worried about the eyebolts either, as long as they are fastened properly.  I am curious, however, why you chose eyebolts instead of clamps.  What are you typically rigging from and what goes between the eyebolt and point?  Shackles and spansets?


This is just a small light setup used in small clubs where they are no lights on stage. Clamps are generally for truss. Eyebolts I can hang from just about anything.

Clamps=$$$
Eyebolts=Less $$$
Logged

Thomas Bishop

  • Sr. Member
  • ****
  • Offline Offline
  • Posts: 379
Re: T Bar Wiring Project
« Reply #19 on: December 30, 2010, 01:13:31 pm »

Yeah, I got ya, just curious as to what you're putting between the rigging point and the eyebolt.  Spansets?  Chain?  Pipe cleaners?  I'm not here to lecture you about safety, I honestly want to know what you typically run into and how you accommodate your rigging for it.
Logged
Pages: 1 [2] 3  All   Go Up
 

Page created in 0.039 seconds with 20 queries.