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Question
I need to determine the minimum allowable wall thickness for the shell and end covers of a Horizontal Steel Overhead Water Tank to be installed on top of 1) 7-storey building (approx. 21M high) with given dimensions as follows: (3.25M dia. x 5.0M); 2) 12-storey building (approx. 36M high) with given dimensions as follows: (3.0M dia. x 8.2M) with middle wall damper
Hi Michael,
I regret that I do not carry out actual designs, for liability reasons-I just give advice.
The best orientation for cylindrical tanks is for their axes to be vertical, then the walls act in hoop tension and can be quite thin (3-6mm, depending on diameter and pressure).
For horizontal tanks, I would suggest you look at those made of panels with stiffners, such as Braithwaite tanks... see below:
http://www.braithwaite.co.uk/pages/downloads.html
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Answers by Expert:
Arshad Khan
Expertise
I can answer any questions to do with civil and structural engineering consultancy and construction industry in East Africa and the Middle East, and specifically with the analysis and design of reinforced concrete structures. My particular expertise is in the aseismic design and optimisation of tall buildings.
Experience
Employment history: 36 years in Construction and consultancy in the UK, Kenya, Tanzania, Uganda, Ethiopia, Eritrea, South Africa, Somalia, Zambia, Austria, Bahrain, Kuwait, Doha and the U.A.E.
Organizations
.Fellow of Institution of Structural Engineers (UK)
.Fellow of Institution of Civil Engineers(UK)
.Member of the Institution of Engineers, Kenya
.Registered Engineer, ERB, Kenya
.Member of the Architectural Association of Kenya (Engineers Chapter)
.Chartered Engineer (UK)
Publications
•1984: International Conference on the Art and Practice of Structural Design, London
•1994: 3rd Int. Kerensky Conference in Structural Engineering, Singapore
•2008: International Conference on High-Rise Towers, Abu Dhabi
Education/Credentials
BSc, 1st Class Hons, in Building Engineering, University of Bath, UK
MSc in Concrete Structures and Technology, University of London.
Diploma of Imperial College, UK.
Awards and Honors
•Science Congress Special Award (for 2-seater Hovercraft - 1968)
•Institution of Civil Engineers Award for outstanding performance at Bath University (1975)
•Concrete Society Postgraduate study Bursary Award (1976)
•Consular Representative for British High Commission, Nairobi. (1995 to 1998)
•Examiner for Institution of Civil Engineers Professional Interviews, Nairobi. (1997 to 1998)
•Branch Representative in Vienna for PI assessment for Inst. of Struct. Engrs. (1999 to date)
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