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This paper deals with the various factors that affect the racking resistance of timber framed panels. The principal factors are the sheathing materials, the extent of vertical loading, the length of the panel, openings, holding down and the nail spacing. Other factors are generally of lesser importance. Test results relating to these factors are analysed, and a relationship is derived for each factor. The effects of outer claddings and inner linihgs are discussed very briefly. A simple design method for calculating the allowable racking resistance of panel assemblies is
R.A. Robertson and D.R. Griffiths
The authors have presented an interesting method for the rapid estimation of maximum bending moments in decks of suspension bridges. Their approximate analysis draws to a
logical conclusion the more general method described by Bowen and Charlton (reference 3 of the paper). It is clear that the use of symmetry and antisymmetry offers a considerable computational advantage :two sets of three linear simultaneous equations are solved far more quickly than one set of six.
F. Van der Woude, M.S. Gregory and H.I.A. Hegab
Mr Lee: It will be seen that our paper comprises two parts, the first on design and the second on construction. My co-author for Part 2, Mr Al-Bayah, was very much looking forward to being here in person as one of the representatives of the client and to participating in the discussion. Unfortunately pressure of work in Iraq has not permitted him to come to London at this time. He has asked me to express his regrets and to pass on the good wishes of himself and his colleagues in the Government of Iraq who were concerned with the bridge for an interesting evening of technical discussion.