The development of a general computer programme for economical solution of large space frameworks by the stiffness method is described. The programme includes routine for equation solution by direct methods; the latter take advantage of the symmetry, bending and sparseness of the stiffness matrix. D.F. Brooks and D.M. Brotton
Dr. Rowe said that the second presentation of the paper might be considered analogous to the second reading of a Parliamentary Bill, with the Code of Practice Committee possibly representing the Upper House! However, should the analogy be taken too far, Dr. Rowe added that he and his colleagues regarded it as an indication of the very considerable argument and controversy, which was going on throughout structural engineering, concerning the new philosophies of design which were being considered and the new concepts which were being propounded.
The Chairman remarked that the paper had referred to a 2-ton crane, the existing 2-ton cranes in the low-level hangar having been taken down, reconditioned and re-erected one bay further out on the cantilever roof. But Fig 6 showed a 5-ton crane on the outer part of the cantilever roof. Was that the crane referred to, or was there another 2-ton crane somewhere? If it was a 5-ton crane that had been moved out, had it been necessary to strengthen the roof structure?
This paper describes a method of analysing a structure consisting of a number of piles embedded at their toes and connected to a rigid mass (such as a bridge pier) at their heads. The piles are treated as straight elastic members having any desired inclination in three dimensions. D.G. Alcock
The author considers the requirements for workmanship in the construction of structural concrete. The concrete mix, batching and placing, the design, construction and striking of formwork are all covered, together with the requirements of curing and cold-weather concreting. The author proposes a svstem of tolerances for construction and gives special consideration to surface finishes for architectural effects. T.N.W. Akroyd