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Re: [TowerTalk] Crankup tower raising

To: <>
Subject: Re: [TowerTalk] Crankup tower raising
From: "Al Williams" <>
Date: Sun, 7 Jan 2007 08:56:53 -0800
List-post: <>
----- Original Message ----- 
From: "Gary Jones" <>
To: <>
Sent: Saturday, January 06, 2007 7:53 AM
> I own two US Towers MDX-589-MDPL, a LM470D,....
> Towers HDX-89-MDPL are new >

> Also, the LMR-470, while
> a very nice tower, does not have the ratings to really want to stress it
> with a very big yagi fully extended in a big wind anyhow. My U.S.Towers
> are substantially tougher towers than my LM-470 ....
>     Gary     W5FI
According to both manufacturers wind load specifications, the U.S, Towers 
are not "...substantially tougher towers than (my) LM-470." !  A few years 
ago the LM-470 manufacturer claimed to have started using a stronger leg 
tubing which upped the wind load capability considerably such that the 
LM-470 specification at 70mph was about 30 % higher than the equivalent U.S. 
tower (and also the HDX589).

I have both a U.S. tower HDX572 and the newer LM-470D.  While the U.S. tower 
looks stronger (and has larger tubing), the wind load specification is less.

Except for the wind load specification I prefer the HDX572, however.



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