Civil Engineering/About Stirrups

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Expert: - 6/16/2009


Question
Sir I am working as a quantity surveyor in Muscat.Now I have
one doubt about stirrups. When I am taking the Bar bending
schedule I saw 'For leg Stirrups and Six Leg stirrups'I ask
doubt to my friends. They given more answers now i am very
confused.Please give one explanation about the quistion.
                                     Thanks and regards
                                          Jijo John  

Answer
Hi Jijo,

You can have 4-leg and 6-leg stirrups, but these are normally in wider beams, otherwise there would be congestion. The main outer stirrup would be around the perimenter, then the next one would be the same height, but narrower, and the the 3rd one narrower than the 2nd. Looking from the top of the beam, you will see 3 no. 2-legged stirrups sitting next to eachother, but looking from the X-section of the beam, you will see 6 vertical hangers, but only 2 horizontal lines of the stirrups, as they will be hidden one behind the other.

So, when taking quantities, each of the inner stirrups will be a complete rectangular link (shape Code 51), unless it has been detailed as a hanger link, such as Shape Code 47 in the website below:

http://www.kbrebar.co.uk/bs-8666  

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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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