This paper documents a field bolt-testing programme using ultrasonic methods. Test procedures are described and results tabulated for field observation of 1 in A490 and 1 1/4 in A490 bolts installed in oversize and standard holes. The effect on bolt pre-tension of placing 5/16in-thick hardened washers under the bolt head and nut of 1 1/4 in A490 bolts in oversize holes was the prime goal of the testing programme. J.S. Notch
Mr D. Dennington (F)(Bullen & Partners): I would like to compliment the authors on their paper and give the meeting some relevant information about another type of transfer station recently completed to handle London's refuse.
R&D strategy-a Construction Research Board The formation of a permanent Construction Research Board is strongly recommended in a recent report to the Building & Civil Engineering EDCs. The report is of great importance to structural engineers. It identifies why a research strategy is required and what should be its tasks. Basically, the CRB should: -develop the coordination of construction R&D -increase industry participation and interest in R&D -raise additional funds for R&D -periodically determine R&D needs and priorities -ensure maintenance of national R&D capabilities -improve technology transfer substantially S.B. Tietz
Joints in steel frames This month we start with a contribution from Mr Denis Wall writing from the Building Control Section of the Dublin Corporation: It is only rarely, nowadays, that one sees cap plates at the knee joints of portal frames. This is probably why the aspect shown in Fig 1 of the design of knee joints in pitched roof portal frames seems to be ignored in design, although it can have an important effect, particularly when the pitch is steep. Verulam