Yup. Pretty difficult for an angle leg tower to fill the legs up with water.
Jim W7RY
On 1/20/2023 9:26 PM, K5CG wrote:
I've been up many 3ertall towers (most made by Leblanc & Royle of Oakville
Ontario at the time) and almost all of them were triangular with angle iron legs
bent to 120 degrees.
They made at least one for the Canadian Coast Guard that was to be installed in a
Maritime province that had 12" diameter solid steel legs designed for heavy ice
loading.
----- Original Message -----
From: "Jim W7RY" <jimw7ry@gmail.com>
To: "towertalk" <towertalk@contesting.com>
Sent: Friday, January 20, 2023 3:02:47 PM
Subject: Re: [TowerTalk] Tower Collapse in South Dakota
A 1000 foot tower most likely has solid rod legs.
Jim W7RY
On 1/20/2023 1:10 PM, Joseph B. Fitzgerald wrote:
Interesting. I had a notion that lattice towers fail due to exceeding the
bending moment of the lower part of the structure trying to accelerate the
upper portion too fast ... this is classic phenomenon in smokestack demolition.
Take a look at this video of a 480 foot tower with a pier pin in West Virginia
that had to come down.
https://www.youtube.com/watch?v=yKQ0p5L_qvU
BTW that tower had to come down because water collected inside the tower legs,
froze and split the tubes. Check your weep holes each year before the first
frost is forecast!!!
I suspect the South Dakota tower was simply built unusually well and could deal
with the bending moment, while the West Virginia tower was not and buckled.
de KM1P Joe
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Thanks and 73, Jim W7RY
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