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Civil Engineering/roof slab reinforment details-

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Expert: - 9/15/2007


Question
Mr Khan - Pl. give yr opinion for the following:
1st floor roof: 1) Room size: 11.5ft x 22ft -2 rooms
               2) Room size: 10 ft x 22 ft -3 rooms
                (room inside measurement)
               a. What is the thickness of slab to be paved  b. What is the suitable main rod and distribution rod -economical as well as good strength and also inform  c/c rod distanc for main and spacer rod. Rooms for living purpose. thanks.

Answer
Hi maganathan,

I do not do designs over this medium, so you should get a qualified engineer to do so for you. Roughly speaking, I would expect the slab to be between 175-200mm deep, with possibly T12-150 both ways, with bottom layer being in direction of smaller span. However, this depends on what the imposed loading is on the roof- if there is heavy snow or sand laoding, it could well be T16-150.

Hope that helps!

Kind regards,

Arshad

Civil Engineering

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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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