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  1. #1
    Join Date
    Mar 2011
    Posts
    0

    help with IR on arch

    I am building a sign and getting ready to order pre bent 3x2 tube steel.

    they need to know the IR that i want.

    I need 3 20 foot pieces that i will be putting 18 inch letters between in 2 rows.

    i dont want a rainbow shape more of a minor arc. do i need a 18" ir?

  2. #2
    Join Date
    May 2004
    Posts
    4519
    I just answered this on another thread.

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