[TowerTalk] Rooftop Poles Diameter Design

[Eng. Osama Ewaida]

Thanks Guys, 

 

Let's keep it simple, my main concern now how to select the proper pole DIAMETER with those inputs. 

 

Can anyone provide me with a spreadhseet to calculate the same. 

 


 
> Date: Tue, 25 Aug 2009 06:59:31 -0700
> From: jimlux at earthlink.net
> To: sam_owe at hotmail.com
> CC: towertalk at contesting.com
> Subject: Re: [TowerTalk] Rooftop Poles Diameter Design
> 
> Eng. Osama Ewaida wrote:
> > 
> > 
> > 
> > 
> > 
> > Hi
> > 
> > What the key parameters affect the pole diameter in addition to Equipment load, Wind Load, and Wind speed ( both operational and survival)
> > 
> > The subject poles can be fallen under different mounting scenario such as : 3 meters wall mount, 6M Non-penetrating poles 
> > 
> > Is there a tool / formula can calculate and recommend the pole diameter with what sort of inputs required? 
> > 
> > Many thanks for your kind support and quick answer in advance. 
> > 
> > 
> 
> There are a variety of spreadsheets out there that can calculate bending 
> loads, and the failure loads for various tubing materials and tubing size.
> 
> For calculating the actual wind loads, it's a bit trickier, because the 
> aerodynamics are nontrivial. A decent approximation is to assume that 
> the antenna is the same as a flat plate with area equal to the projected 
> area of the antenna parts (that is, a 5cm diameter tube 3 meters long 
> has an equivalent flat plate area of 3*.05 = .15 m^2) You then 
> calculate the aerodynamic load by 1/2*rho*v^2*area in the usual way.

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