Unsiffened Dome Roof

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basel alsaleh Participant Join Date: Aug 2013 Posts: 3	Unsiffened Dome Roof 10/16/2014 6:10 AM
	Can it possible to have a tank 11 m diameter with unstiffened dome roof ?
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SimpleMind Guru Join Date: Sep 2009 Posts: 1056 Good Answers: 88	#1 Re: unsiffened dome roof 10/16/2014 7:02 AM
	If you are not interested in economic efficiency, yes. S.M. __________________ Life is complex. It has a real part and an imaginary part.
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ozzb Guru Join Date: Mar 2007 Location: Rosedale, Maryland USA Posts: 5197 Good Answers: 266	#2 Re: unsiffened dome roof 10/16/2014 7:38 AM
	They sell swimming pools 36 feet in diameter. That's a tank with no roof at all. __________________ Life is not a journey to the grave with the intention of arriving in a pretty, pristine body but rather to come sliding in sideways, all used up and exclaiming, "Wow, what a ride!"
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Whitephone Guru Join Date: Jan 2010 Location: Mineral wells Tx Posts: 630 Good Answers: 34	#3 Re: unsiffened dome roof 10/16/2014 9:09 AM
	Not to much information, height?, material?, type of tank?.......... Assume that is a API 650 Storage tank, then, yes you need to install stiffening ring in the upper according to API 650 Ad3_2011 Parr. 5.9 Above 6 meters in diameter is mandatory. WP
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Anonymous Poster #1	#4 Re: Unsiffened Dome Roof 10/16/2014 11:12 AM
	Rather than asking a bunch of strangers "what they think", the correct way to answer your question is to have a competent engineer perform an engineering analysis. Software has been developed to design, calculate and qualify tank roof designs according to design codes such as API-650 and API-620. It is important to note that an unstiffened dome roof may be acceptable for one set of tank design conditions. but not another. Complex and expensive structures such as flat bottomed tanks require an experienced engineer's talents.
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Whitephone Guru Join Date: Jan 2010 Location: Mineral wells Tx Posts: 630 Good Answers: 34	#5 In reply to #4 Re: Unsiffened Dome Roof 10/16/2014 11:55 AM
	if so, would not exist forums opinion. Maybe just you and , may be, another anonymous
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Hilton Guru Join Date: Jun 2011 Location: Mossel Bay, SA Posts: 777 Good Answers: 21	#7 In reply to #4 Re: Unsiffened Dome Roof 10/21/2014 9:50 AM
	I don't think any domed roof can be considered "unstiffened". The 'dome' geometry is the stiffening!
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dhayanandhan Guru Join Date: May 2008 Location: CHENNAI, TAMIL NADU, INDIA. Posts: 1851 Good Answers: 65	#6 Re: Unsiffened Dome Roof 10/17/2014 11:41 AM
	Dear Mr.basel alsaleh, The answer for your question is YES. Technically it is possible. Cost who will bear.? It appears certainly not you. DHAYANANDHAN.S
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Anonymous Poster (1); dhayanandhan (1); Hilton (1); ozzb (1); SimpleMind (1); Whitephone (2)

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