Professor A. Bolton (F) (formerly, Heriot-Watt University)
I read this paper with great interest because it presents much data of value to practising engineers. The experimental work was carried out after careful thought and preparation, and the results are offered in a form which can be applied directly to other structures. The extreme difficulty of carrying out full-size tests of this kind on practical structures is not always appreciated but such a paper is then read and used by many more than would read the formal solution of a theoretical problem. The work of Professor Bryan and his colleagues at Salford University, Dr. Morris at Manchester, and Dr. Cunningham, which are listed in the references of Dr. Robertson’s paper, are of this same useful kind.