[TowerTalk] More crank-up questions

[Bob K6UJ]

Mike,

FYI,  newly poured concrete for foundations reaches 70% of its maximum compressive strength in 7 days.
It is considered fully cured in 28 days.  

Bob
K6UJ





 concrete is for building foundations , floor slab and streets, newly poured concrete is considered fully cured in 28 days.Maximum compressive stremgth of 60,000 psi would be attained.          




On Nov 30, 2013, at 8:32 AM, Mike Reublin NF4L wrote:

> Thanks Ed.
> 
> Mike NF4L
> On Nov 30, 2013, at 11:13 AM, Edward <navydude1962 at yahoo.com> wrote:
> 
>> It's a good tower.  No limit switch.  Gravity not positive pull down. Cure for 30 days and don't ground your rebar. 
>> 
>> For antenna mounts fabricate a cross arm and mount above second section.  Works great.  
>> 
>> Good luck.  Great tower.  Have had mine for many years.  
>> 
>> Ed NI6S
>> 
>> Sent from my iPhone
>> 
>>> On Nov 30, 2013, at 18:38, Mike Reublin NF4L <nf4l at comcast.net> wrote:
>>> 
>>> I plan to put up a motorized HG-70 HD, with a 4 element SteppIR and a 7 element M2 6M beam.
>>> 
>>> Hy-Gain says 1 week for foundation curing, UST says 4 weeks. What's realistic?
>>> 
>>> My current guyed tower has a side-mounted G-7 and a couple of vhf verticals. How best to mount those on the crank-up? I was thinking of hanging the G-7 upside down.
>>> 
>>> Does this tower have latches, or is the weight on the cables when extended? 
>>> 
>>> What about limit switches or stops?
>>> 
>>> I'd like to carry over my 80 and 160M 1/4 wave slopers. Is that too much stress? What about ground continuity top to bottom?
>>> 
>>> Does the concrete/rebar cage make a Ufer ground? Do I need ground rods in addition?
>>> 
>>> 73, Mike NF4L
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>>> 
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