The Institution in South Africa

This paper describes the structural design and construction of the surge tank for the Palmiet pumped storage scheme. The free-standing portion of the tank is 62m high and 21 m diameter and is prestressed vertically and circum ferentially. The particular design problems and their solutions are described in detail, together with the methods of analysis used. K.M. Price

The paper describes the design and construction of the Hugo's River Viaduct, and reasons are given for the choice of a viaduct instead of an embankment. H.B. Mills

A wind tunnel study undertaken to investigate large oscillations observed on a microwave tower is reported. It is found that large oscillations can occur for a narrow band of wind directions, which are produced by vortex shedding from the microwave reflectors. R.V. Milford and A.M. Goliger