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Expert: - 8/7/2010


Question
QUESTION: Dear Sir,
Good day to you//// what is the use of tie runner in the steel trusses.and how can I design it.Is any standard size for it for a truss having a span of 17m and the truss members are CHS.thanx so much.....

ANSWER: Hi Ravi,

Please explain in more detail what you mean by a tie-runner.

---------- FOLLOW-UP ----------

tie runner shown in this plan
tie runner shown in th  
QUESTION: Dear Sir,Good day.actually I would like to know what is the requirement of a tie runner that as shown in a typical truss drawing that is being attaching here for your kind perusal...thanks so much..

Answer
Hi Ravi,

I am sorry but the drawing is too small to see and this is not a terminology I have come across. If they are ties at the bottom nodes, between adjacent trusses, then they are usually there to brace the bottom chord against buckling when it goes into reverse stress (compression) due to wind-induced uplift.

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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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