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Civil Engineering/Beam Loading from slab & point load


hi sir. sir if a slab is supported on 4 beams but it is one way slab then what will be the load on those 2 beams which are along shorter side as in 1 way slab load is only transfered on only 2 beams which are along longer side.
2nd question is that if a beam is supporting another beam on it then it will have point load on it , what will be the difference in design of this beam and the design of the beam which in only having UDL?

Hi Ali,

Its seems that you need to study some technical text books, as these are basics of structural engineering:

1. For the shorter span beam, there will be some loading from part of the slab, which on plan will be triangular in shape. Or you can assume a strip equal to about 1/4 span wide that will load the beam.

3. For secondary beam, it will be a point load on the main beam and the differnce will be in the bending moment in the main beam- which is maximum WL/8 for UDL and WL/4 for a point load and the shear force diagram is also different for the two.  

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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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