The Behaviour and Design of Mineshaft Steelwork and Conveyances

Microcomputers It is now nearly a year since Mr B. C. Bird asked his question about frame analysis programs for the 48K Spectrum. Since then we have had a substantial response from our readers, drawing attention to programs and problems associated with their use. This month we have three more letters. Mr K. Tregear, writing from Nizwa in the Sultanate of Oman, says that he was most interested to read, in the December issue, of the approach by Mr Bradfeld to the design of rectangular beams and slabs in accordance with the CP 110 idealised stress block.

The paper describes the development of the design of Kylesku Bridge as a sequence of design studies and decisions, from studies of the location of the new bridge and of different types of structure to final design. The new bridge is a frame with V-shaped supports. It is built in concrete and the deck is a box girder that is prestressed. The bridge was designed to be built in stages and within constraints that were specified in the contract documents. J. Nissen, K. Falbe-Hansen and H.S. Stears

Buckling is usually associated with slender structures of stiff materials, such as steel and aluminium. This paper aim to show that it occurs, also, in foundation engineering and soil mechanics. Foundations and soil samples of relatively robust dimensions can be vulnerable to buckling when deformations are large, i.e. when the stiffness of the soil is low. E.C. Hambly