rigid conduit vs galv pipe

Discussion in 'General Technical Questions and Answers' started by KR8K, Oct 22, 2008.

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  1. KR8K

    KR8K Ham Member QRZ Page

    Does anyone know the strength difference between rigid conduit and galavanized pipe? I need to make up a mount for a rotor and a roof tripod and I found that the heavy duty mast that Rat Shack sells is too small. The rotor takes 1.5 -2.5 inch pipe. I'm guessing the pipe I have is maybe 1.25 OD. It looks like rigid conduit or galv pipe has a size that puts me right in the middle, just wondering if there's an advantage of using one over the other.

  2. KR2D

    KR2D Ham Member QRZ Page

    Rigid conduit is smoother, at least on the inside, than galvanized pipe. I assume the reason is to facilitate pulling wires through it. I don't know if there is any difference in mechanical properties (strength, etc).

    Rigid conduit is significantly more expensive than galvanized pipe.
  3. W5WPL

    W5WPL Premium Subscriber QRZ Page

    Galvanized pipe will be stronger than conduit because it's schedule (or gauge) is thicker.
  4. WB2WIK

    WB2WIK Premium Subscriber QRZ Page

    Why not try antenna mast material?

    Tubing is all application specific from fence posts to gas pipes, to electrical conduit, etc.

    Almost all of it is designed to be bent by a tubing bender, which means it's not particularly strong, it just suits the originally intended application.

    Antenna mast material is designed to have very high strength and resistance to compression and bending -- just the opposite of conduit. It's normally rated in the 40,000 psi to 90,000 psi yield strength range, which is ten times (or more) what you can get from most "pipe" materials found at Home Depot, etc.

    Again, it's application-specific.

    I use actual "antenna mast" material and have had installations up for 30+ years without service, through very high winds, icing, etc. It's not sold at Radio Shack, or at Lowe's, but is easily found if you look for it. Texas Towers, among others, stocks the good stuff.

  5. M3KXZ

    M3KXZ Ham Member QRZ Page

    Use galvanised scaffold poles - very very strong, can withstand loads of lateral force without bending, can clamp tight without the wall collapsing and will last forever. .

  6. KL7AJ

    KL7AJ Premium Subscriber QRZ Page

    And weigh a ton. But you're right.... :)
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