[TowerTalk] ROHN TOWER BOLTS

Wed May 7 16:51:10 EDT 2014

See my other reply. Say you are using a grade dh carbon steel nut, they are up at 175k, a standard grade 8 nut is 150k. That is above the A286. Like I said, just be careful

--  
73 de KG2V
Charlie

> On May 7, 2014, at 4:41 PM, Tom Nicholson <Gunsrus1942 at Comcast.net> wrote:
> 
> NO FLAMES HERE!
> 
> Here is what I have for choices:
> 
> Not the average Home Depot / Lowes "Stuff"
> 
> 
> A286 Super Alloy—With approximately 26% nickel and 15% chrome, this iron-based super alloy brings you the strength of alloy steel with corrosion resistance similar to 18-8 stainless steel. It meets ASTM A453 Grade 660 and is not magnetic. Screws have a minimum Rockwell hardness of C31 and minimum tensile strength of 140,000 psi.
> 
> 17-4 PH Stainless Steel Alloy—Combines the high strength of alloy steel with the corrosion resistance of stainless steel. It meets ASTM F593 Grade 630 and is magnetic. Screws have a minimum Rockwell hardness of C31 and minimum tensile strength of 140,000 psi.
> 
> Alloy 20 Stainless Steel—Also known as Carpenter 20 screws. With excellent resistance to sulfuric acid, these screws have a minimum tensile strength of 80,000 psi.
> 
> I also have a choice of 18-8 or 316 SS Nylon lock nuts.
> 
> Tom W1ALZ
> 
> 
> 
>> On 5/7/2014 4:13 PM, Mike Ryan wrote:
>> My 2 more cents....
>> I have used one or two stainless steel bolts in the past when short a bolt. However, my recollection was that stainless steel is not as strong as the bolts supplied with the tower and/or recommended. You might want to be careful with these types of substitutions, (for example the ss bolts and nylon nuts)...what grade/quality of stainless? They sound good but..? Ok, now open to flames .... - Mike
>> 
>> -----Original Message----- From: Tom Nicholson
>> Sent: Wednesday, May 07, 2014 3:46 PM
>> To: Mark Pride ; Mike Ryan ; towertalk at contesting.com
>> Subject: Re: [TowerTalk] ROHN TOWER BOLTS
>> 
>> Just my 2 pennies here, but I'm going to be using SS hardware but I'll
>> be using SS Nyloc Nuts. Also if using SS, be sure to use never seize
>> compound, if you don't, the nuts will almost for sure seize up if you
>> try to remove at a latter date. Lesson "hard learned" with SS bumper
>> bolts on my Hot Rod!!!
>> 
>> Tom W1ALZ
>> 
>> 
>> 
>> 
>>> On 5/7/2014 9:50 AM, Mark Pride via TowerTalk wrote:
>>> Heard a story many years ago about a tower that was installed in KH6 with stainless steel hardware and after time, with the constant trade winds, the nuts all fell off.
>>> There is vibration to contend with in certain places around the world.
>>> 
>>> Regards,
>>> Mark, K1RX
>>> 
>>> On Wednesday, May 7, 2014 9:44 AM, Mark Pride via TowerTalk <towertalk at contesting.com> wrote:
>>> One other point on the tower hardware from Rohn these days. They have changed their hardware where the nuts are designed to be put on the bolt ONE time. To remove the nut, one will damage the thread of the bolt (sorry - forgot the description of this design - lock nut?). Guess the concept is, you put up a tower one time and never take it down! However to their point, it prevents nuts from backing off (good thing).
>>> 
>>> Regarding the new hardware you find in the tower leg of the new material - you might want to change it. The current nut design has 3 indentations on the surface - pretty easy to spot. Bolts are fine, just need to change the nuts.
>>> 
>>> Regards,
>>> Mark, K1RX
>>> 
>>> On Wednesday, May 7, 2014 7:43 AM, Mike Ryan <mryan001 at tampabay.rr.com> wrote:
>>> Larry is correct in that both the 25 and 45 use different size bolts and if
>>> my memory serves me, this would be 4 different sizes in the case of these
>>> two tower types. I have never seen washers used with these. It is
>>> noteworthy, that should you be putting tower sections up, to be ABSOLUTELY
>>> sure that the legs are clear inside. Run a garden hose through the leg to be
>>> sure there is no blockage, or even push a ground rod through each one for
>>> example. I can't tell you how many times I have found blockage in the
>>> legs...dirt, mud, bugs, etc. And while on the subject, occasionally found
>>> that the blockage was TOWER BOLTS that were packed in the legs by the
>>> manufacturer which had never been found/removed. -Mike
>>> 
>>> -----Original Message-----
>>> From: Larry
>>> Sent: Wednesday, May 07, 2014 5:47 AM
>>> To: towertalk at contesting.com
>>> Subject: Re: [TowerTalk] ROHN TOWER BOLTS
>>> 
>>> 25G and 45G use two different sizes at each joint on each leg. I forget what
>>> size they are offhand. DX Engineering sells leg bolts and their web site may
>>> tell you what the sizes are or the perhaps the Rohn web site.
>>> 
>>> 73, Larry W6NWS
>>> 
>>> -----Original Message-----
>>> From: Cal Zethmayr
>>> Sent: Wednesday, May 07, 2014 12:02 AM
>>> To: towertalk at contesting.com
>>> Subject: [TowerTalk] ROHN TOWER BOLTS
>>> 
>>> There is quite a debate at one of our local Saturday morning breakfasts
>>> gabfests about Rohn Tower Bolts.
>>> 
>>> Some say that Rohn uses two different size bolt sets for each tower section.
>>> Some say that Rohn uses only one size bolt-washer-nut sets for all towers.
>>> 
>>> So what are the facts?
>>> 
>>> Are there different size bolt sets for Rohn towers, and are they different
>>> depending on the tower ? 25G, 45G and 55G?
>>> 
>>> Cal Z
>>> W4GMH in Crestview, FL.
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