Civil Engineering/Footing design

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Expert: - 9/1/2011


Question
Hi Sir,

I am a fresher in the industry.
I would like to know the design of  a tie beam.
I have an inverted t-beam footing connecting the footing of an eccentrically loaded footing (of an exterior wall) and another footing. So can this t-beam footing be used a tie beam to prevent the eccentrically loaded footing from differntial settlement?
If so, what are the special considerations, i have to make use in the design of TIE BEAM, rather than designing it as a  normal beam?

What are the special consideartions i have to make use in the design of the ECCENTRICALLY LOADED FOOTING of the exterior wall?

Thanks
Dhanya

Answer
Hi Chris (Dhanya?),

Yes, you can use the inverted T-beam as a tie beam and design it for double curvature bending/shear due to differential settlement, which you will need to determine in conjunction with the soils investigation report.

For eccentrically loaded footing design, please browse my past answers using these key words and you will find further advice.

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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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