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Mr. Brian Scruby (Chairman): ‘ A point that occurred to me when reading your paper was that when I went to America a few years ago I saw some buildings which I thought were rather typical of the industrial side of American building and which seemed to be designed for a specific period of time. I wonder if you would say something about durability and its particular reference to the time factor? '
A method is presented in which the differences in stay tensions necessary to maintain equilibrium in a mast subjected to wind loading are related to the actual tensions developed in the stays as a result of changes in length of the stay chords caused by a
displacement of the mast from an initial position.
As most of the piers of viaducts act as cantilevers for horizontal loads at top, requiring greater rigidity at base along longitudinal direction, a new type of structural element is suggested which is expected to serve as pier with reasonable efficiency. Rigidity at bottom is not much needed if piers act as a whole, being framed by top capping beam.
S.K. Kundoo and B.B. Maiti