MyFloridaCode.com

These transformers are about 6 feet tall, not 30 inches.  I appreciate the
math lesson but I believe there are probably other things to consider
besides wind that have the ability to move a transformer.

Thanks to everyone for their inputs.  I'll press on the with info I've
received.

Ken

-----Original Message-----
From: Glen Mast [mailto:glenmast at comcast.net] 
Sent: Monday, December 01, 2008 11:27 PM
To: Ken Rodgers; codetalk at myfloridacode.com
Subject: Re: [Florida Code Talk] Anchoring Transformers

Lets actually look at 150mph, Exposure "C", wind loads on a transformer that

is 4'x4'x30'' tall.

ASCE7-02 would treat this transformer like a solid sign or a fencewall.
With an importance factor of 1.0 the lateral wind pressure would be 48.6 
psf.
48.6 x 4 x 2.5 = 486#

If the transformer weighs 2000# and the sliding coefficient is .4 (I don't 
have my ACI book here but I think that is close) then the friction provides 
800# resistance.
ASCE7 doesn't assign uplift to the tops of signs but just for arguments sake

lets assign 45psf.
45 x 4'x4' = 720# uplift
2000 - 720 = 1280#
1280 x .4 = 512# resistance


 So if your in Dade-Broward you might be able to make an argument for it but

anyplace else it appears the power company has a valid point..

glen mast
.


----- Original Message ----- 
From: "Ken Rodgers" <Ken at artisanbilt.com>
To: <codetalk at myfloridacode.com>
Sent: Sunday, November 30, 2008 8:09 PM
Subject: [Florida Code Talk] Anchoring Transformers


> Hello All,
>
>  I have a question about securing the large transformers (large green
> boxes) to the slab they sit on.  The power company says it does not bolt
> these to the slab even though the box  does have bolt flanges at the 
> bottom
> for bolting.  I'm trying to find something (code or otherwise) that states
> the requirement to actually use the supplied bolt holes to secure the
> transformer to the slab.  The power company just says that because it 
> weighs
> 2,000 lbs it's not going anywhere and thus they don't bolt it.  I guess
> using that rationale then we don't need to bolt houses down to the
> foundation.  Any info would be greatly appreciated.
>
>
>
> Ken
>
>
>
> Ken Rodgers
>
> ArtisanBilt Construction
>
>
>
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