Page 1 of 2 12 LastLast
Results 1 to 10 of 11

Thread: Supporting 2x4 lay ins

Hybrid View

Previous Post Previous Post   Next Post Next Post
  1. #1
    Join Date
    Jun 2018
    Location
    Monroe North Carolina
    Posts
    2

    Supporting 2x4 lay ins

    We are wiring a gym addition on a school in South Carolina and they don't use city or county inspectors the go thru a company to do inspection. The inspectors are telling us that when tying up lights we must tie up all four corners of the light and wrap the tie wire around itself 3 times within a inch and it must be tight. Also tie wire must be going in the same angle as the other peices of tie wire or we fail. Didn't know if anyone else has run into this or if we are just getting bullied into doing this.

  2. #2
    Join Date
    Feb 2003
    Location
    Bremerton, Washington
    Posts
    7,958
    That is a building code requirement. NEC only requires the luminaire to be fastened to the grid.
    Moderator-Washington State
    Ancora Imparo

  3. #3
    Join Date
    Dec 2011
    Location
    Ocala, Florida, USA
    Posts
    2,750
    Quote Originally Posted by Redskins92 View Post
    We are wiring a gym addition on a school in South Carolina and they don't use city or county inspectors the go thru a company to do inspection. The inspectors are telling us that when tying up lights we must tie up all four corners of the light and wrap the tie wire around itself 3 times within a inch and it must be tight. Also tie wire must be going in the same angle as the other peices of tie wire or we fail. Didn't know if anyone else has run into this or if we are just getting bullied into doing this.

    Agree with Tom if that is for the GRID not the light. That would never be the electrical contractor's responsibility, but I think it is actually the ceiling grid instructions not the building code per se. In some places, including California you are required to install a ceiling wire in opposite corners, so two each to the light itself. Never seen a requirement for 4 corners.


    I know what I don't know, and I know where to go to find it!

  4. #4
    Join Date
    May 2011
    Location
    CA
    Posts
    41
    don't forget your earth quake clips securing fixture to grid.

  5. #5
    Join Date
    Dec 2011
    Location
    Ocala, Florida, USA
    Posts
    2,750
    Quote Originally Posted by IMFOTP View Post
    don't forget your earth quake clips securing fixture to grid.

    They are called hurricane clips in Florida.


    I know what I don't know, and I know where to go to find it!

  6. #6
    Join Date
    Dec 2007
    Location
    NE Nebraska
    Posts
    38,252
    I think some places go overboard on this. Newer troffers and now LED panels are much lighter then old troffers used to be. Some maybe even lighter then the tile that would otherwise go in the same hole, the tiles don't ordinarily get extra support or securing
    I live for today, I'm just a day behind.

  7. #7
    Join Date
    Jun 2004
    Location
    Cherry Valley NY, Seattle, WA
    Posts
    4,723
    Quote Originally Posted by kwired View Post
    I think some places go overboard on this. Newer troffers and now LED panels are much lighter then old troffers used to be. Some maybe even lighter then the tile that would otherwise go in the same hole, the tiles don't ordinarily get extra support or securing
    Good point. Installed some 2x4 led panels today. They weight about half of what a tile weighs....
    Ethan Brush - East West Electric. NY, WA. MA

    "You can't generalize"

  8. #8
    Join Date
    Jun 2018
    Location
    Monroe North Carolina
    Posts
    2
    Its ridiculous here. Your tie wire cant touch any other trades stuff all four pieces of tie wire must be going in the same angle and must be twisted tightly 3 times with in a inch. We have to paint the tie wire a certain color also. Also have to pull huricane clips which isn't a problem but also had these seismic rated clips on the light also that secure them to the grid.

    Sent from my LGL164VL using Tapatalk

  9. #9
    Join Date
    Feb 2003
    Location
    Bremerton, Washington
    Posts
    7,958
    Quote Originally Posted by Redskins92 View Post
    Its ridiculous here. . We have to paint the tie wire a certain color also. Also have to pull huricane clips which isn't a problem but also had these seismic rated clips on the light also that secure them to the grid.

    Sent from my LGL164VL using Tapatalk
    That's long been a code requirement. When UL tests a ceiling assembly, they have a large fire room, the grid is installed and a fire started to check the fire resistance of the grid. When you install electrical conduits on the grid wire, that installation has not been evaluated by UL. So we install our own wires that are a different color.

    And most importantly, the ceiling installers don't like us on their wires. I like the Caddy EC2 clips it lets the ceiling float at the bottom
    Moderator-Washington State
    Ancora Imparo

  10. #10
    Join Date
    Feb 2003
    Location
    Fl
    Posts
    17,330
    Quote Originally Posted by Redskins92 View Post
    We are wiring a gym addition on a school in South Carolina and they don't use city or county inspectors the go thru a company to do inspection. The inspectors are telling us that when tying up lights we must tie up all four corners of the light and wrap the tie wire around itself 3 times within a inch and it must be tight. Also tie wire must be going in the same angle as the other peices of tie wire or we fail. Didn't know if anyone else has run into this or if we are just getting bullied into doing this.
    Most of NC is in seismic Category C and the requirements for suspended ceilings can be found in this publication and depending on the specs it may or may not be the electricians responsibility but unfortunately it probably is.

    Roger
    Moderator

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •