Author: Tietz, S
First published: N/A
Standard: £9 + VAT
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Mr Immediate Past President, ladies, gentlemen, members and guests, I should first like to convey my thanks to members of the Institution for electing me as President of this great Institution of ours. To be elected President is a great honour, but I am very well aware that great responsibility accompanies that honour, particularly in view of the responsibility that Chartered and Incorporated Structural Engineers have for public safety.
Professor L.A. Clark
Mr P. Maranian (Brandow & Johnson Associates, California, USA):
I have five comments on the excellent paper by Byfield & Nethercot.
( 1 ) From how many mills were samples taken? Did this represent most of the major producers in Europe?
(2) Did any samples come from mills outside of Europe (e.g. South America, Japan, USA)?
(3) The paper mentions that webs have much higher yield stress than the flanges. There has also been some concern recently in the USA that along with the higher yield stress in the web, very low toughness has been found in the ‘K’ area (junction between flange and web). This has typically occurred in rolled sections but is somewhat alleviated when gag straightened methods are used. Were any studies carried out on toughness characteristics of steel?
(4) Were any studies carried out to determine variation due to mill processes, i.e. semi-killed, killed, silicon, continuous casting, etc?
(5) A few engineers on the west coast of the USA have been somewhat concerned regarding
the distribution of non-metallic inclusions (e.g. sulphides, silicates) and their detrimental effect on the performance of welds.
Have there been any recent studies carried out on this aspect?
Collateral warranties - exclusion clauses
Tony Sheehan, writing from London WI, has provided more useful information regarding
studies aimed to replace exclusion clauses. He writes:
Lists were introduced by various client bodies in an attempt to prevent the use of materials that were thought to have weaknesses in terms of
- health and safety
- impact on value for resale