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EMT conduit as antenna mast/pole

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Old 03-09-2009, 02:33 PM   #1
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Default EMT conduit as antenna mast/pole

I was looking and the galvinized 10' 1.25" EMT conduit has a 1.5" outside diameter. It's actually quite thick gauge, would this be OK to use as a mast because I cannot find over 5' mast at the regular stores, which are 1.25" and very thin walled.
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Old 03-09-2009, 03:01 PM   #2
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EMT works well as a mast.
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Old 03-09-2009, 04:01 PM   #3
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Originally Posted by PoorSignal View Post
Would EMT be OK to use as a mast?
Yes, but only if the antenna size is modest.

EMT is meant to be bent, has a low yield strength, and a thin wall. Quality TV mast uses a stronger steel alloy.

1" galvanized water pipe has a similar yield strength but thicker wall than EMT. The wall thickness of 1 1/4" EMT is .065". The wall thickness of 1" schedule 40 pipe is .135 ". (The outside diameter of 1" galvanized Pipe is 1.315".)
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Old 03-09-2009, 05:54 PM   #4
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Originally Posted by Tower Guy View Post
Yes, but only if the antenna size is modest.

EMT is meant to be bent, has a low yield strength, and a thin wall. Quality TV mast uses a stronger steel alloy.

1" galvanized water pipe has a similar yield strength but thicker wall than EMT. The wall thickness of 1 1/4" EMT is .065". The wall thickness of 1" schedule 40 pipe is .135 ". (The outside diameter of 1" galvanized Pipe is 1.315".)
Good info, I used 2" EMT on my tower, that worked well, but schedule 40 1" pipe idea, sounds good for most people!
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Old 03-09-2009, 08:42 PM   #5
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Originally Posted by Tower Guy View Post
Yes, but only if the antenna size is modest.

EMT is meant to be bent, has a low yield strength, and a thin wall. Quality TV mast uses a stronger steel alloy.

1" galvanized water pipe has a similar yield strength but thicker wall than EMT. The wall thickness of 1 1/4" EMT is .065". The wall thickness of 1" schedule 40 pipe is .135 ". (The outside diameter of 1" galvanized Pipe is 1.315".)
Thanks, I went to look at the water pipe you mentioned I cannot even lift up the pipe to check the thickness.. 10'... I imagine might be quite difficult to install.
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Old 03-09-2009, 10:10 PM   #6
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Thanks, I went to look at the water pipe you mentioned I cannot even lift up the pipe to check the thickness.. 10'... I imagine might be quite difficult to install.
If you're not comfortable, don't do it.

I believe that a real tower is safer while using a climbing harness than climbing a ladder or standing on a rooftop. While strapped on a tower such a pipe is very manageable.
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Old 03-10-2009, 06:58 AM   #7
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Originally Posted by PoorSignal View Post
I was looking and the galvinized 10' 1.25" EMT conduit has a 1.5" outside diameter. It's actually quite thick gauge, would this be OK to use as a mast because I cannot find over 5' mast at the regular stores, which are 1.25" and very thin walled.
I used that pipe. Actually, I grabbed the 1.5" by mistake and had to grind the brackets a little. It is a very solid mast, which is pretty much needed for my 4228 to stay up in 50+ mph winds.
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Old 03-10-2009, 10:32 AM   #8
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Do you have a RadioShack close by? They usually stock 10' masts, that's where I got mine. If not you may be able to use guy wires to add strength to emt.
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Old 03-10-2009, 12:35 PM   #9
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Do you have a RadioShack close by? They usually stock 10' masts, that's where I got mine. If not you may be able to use guy wires to add strength to emt.
EMT 1.25" would be by FAR better then the Radio Shack/Fleet Farm/Menards stock mast, that stuff is an accident waiting to happen. (learned from experience!)
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Old 03-10-2009, 12:38 PM   #10
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Yes, I did see radio shack has it instock and checked the reviews are terrible, sounds like I might as well made the pole with hay and mud :P

The only other pole I can possibly find is channel master 10 ft, is that good?
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Old 03-10-2009, 01:54 PM   #11
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Yes, I did see radio shack has it instock and checked the reviews are terrible, sounds like I might as well made the pole with hay and mud :P

The only other pole I can possibly find is channel master 10 ft, is that good?
Can you get up to it and look at the end? Otherwise, EMT is the best recommendation for quick pickup and install....(there is 2 gauges of EMT at my local Menards, I use the thinner)
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Old 03-15-2009, 12:57 PM   #12
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Quote:
Originally Posted by PoorSignal View Post
I was looking and the galvinized 10' 1.25" EMT conduit has a 1.5" outside diameter. It's actually quite thick gauge, would this be OK to use as a mast because I cannot find over 5' mast at the regular stores, which are 1.25" and very thin walled.

I used a 10' by 2" metal conduit which incidentally you can fit a CM rotator onto. Then I used a 2' piece of 1.25" mast into the rotator. It is sturdily mounted to my house in 3 places and has twice withstood several hours of 60-70mph winds. I have a 91XG and YA-1713 on it. In our area, these recent winds have bent and brought down many TV towers(obviously much taller than my setup) that stood a good many years. A great deal of the fallen towers simply lost their moorings to their houses.

Sorry to revive the old thread but I thought I could encourage the use of larger conduit as a foundation for his antenna rig.

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Old 03-16-2009, 12:25 PM   #13
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Originally Posted by Acerbean View Post
I used a 10' by 2" metal conduit which incidentally you can fit a CM rotator onto. Then I used a 2' piece of 1.25" mast into the rotator. It is sturdily mounted to my house in 3 places and has twice withstood several hours of 60-70mph winds. I have a 91XG and YA-1713 on it. In our area, these recent winds have bent and brought down many TV towers(obviously much taller than my setup) that stood a good many years. A great deal of the fallen towers simply lost their moorings to their houses.

Sorry to revive the old thread but I thought I could encourage the use of larger conduit as a foundation for his antenna rig.

Acerbean
I have a 10'x2" on top of my tower, sticking out about 8' with 2 91XGs and a YA1713, it barely wiggles in the wind...
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