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Civil Engineering/difference b/w Wall & column


Dear Sir,
Browsing ur past answer

To assign a wall

1. The length to width ratio is more than 5.
2. The height to length ratio is less than 3.
3. If the vertical stress due to axial load is not significantly higher than the +/- stress caused by lateral load.

Keeping in mind these three point whether there is any restriction in ACI code or any problem in structure if take wall
rather then column when the
length to width ratio is less than 5.
or the other two pts. are also not satisfied.
Thank you again in advance for ur prompt answer.

Hi Mohamed,

The above rules are not hard and fast but based on first principles. I am not sure about any ACI rules but I would say that if the biaxial bending stresses are high compared to vertical stress and shear in plane of longer length is relatively low, you could consider this as a column.

Otherwise treat it as a shear wall, which is primarily for resisting lateral load, so in-plane shear is much higher than out-of plane shear.

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Arshad Khan


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.


Employment history: 40 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.

.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)

•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 •2013: IEK International Conference, Kisumu, Kenya

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 2010)

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