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Newsletter No 50 - April 2018

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Report Overview

The first Newsletter was published in November 2005 with brief comments on a number of short reports under the headings: Near Misses, Collapses, Design Issues, Building Control, Engineers on Site, and Fixings. CROSS had started a short while earlier on a six month trial basis and we had no idea if the project would take off. Since then it has grown and is now the model for versions in other countries. The core topics have remained remarkably similar showing that lessons must be continuously re-learned so that safety culture can improve. Many thousands read the Newsletters in countries around the world and the number continues to grow. Reports now tend to be about more serious issues, although the headings remain remarkably similar, and the comments from our expert panel are longer and more detailed. We continue to be non-judgmental and to give advice that will help others who are faced with similar situations to those reported. The Newsletters, SCOSS Alerts, and of course the CROSS Reports, are on our Structural-Safety database to provide a unique legacy of structural safety information. None of this would have happened without the continuous support of our financial sponsors: The Institution of Structural Engineers, The Institution of Civil Engineers, and The Health and Safety Executive. Particular thanks go to IStructE and their staff who, as lead sponsors, provide essential services in addition to generous funding. Nor would anything have happened without the unstinting services of our voluntary SCOSS Committee and CROSS Expert Panel. Some of the personnel have changed over the years but the levels of commitment and undiminished enthusiasm have remained. Special thanks go our previous chair Professor Gordon Masterton, and our current chair Bill Hewlett, for their leadership and far-sightedness. The most important component of all is the commitment of those who report their safety concerns or event descriptions to us. Their support in providing the material from which we can learn, and which benefits the public and the construction industry is without parallel. The categories of their reported concerns or events gathered over the last 13 years is shown in the Figure below. Thank you all very much.

Overview of Reports in this Newsletter

726 Combustible insulation in rainscreen cladding

Whilst walking past a tall residential building being constructed in the UK, a reporter observed the facade build-up to consist of combustible insulation with a rainscreen cladding.

736 Building extension causes snow drifting failure

The reporter feels that structural engineers are failing to realise the implications of creating a valley or an upstand and are failing to check existing structural elements including foundations for the increased load.

665 Lack of masonry wall ties

A reporter states that they have come across the presence of serious defects in masonry construction in the past and have no doubt that many other engineers have had similar experiences.

735 Inadequate design of cantilever glass barriers

A reporter has observed a growing number of cases where cantilever glass balustrades in public buildings are, in their view, designed inadequately.

683 Corrosion causes collapse of steel floodlight mast at football club

This is an Alert that was issued by a Local Authority responsible for enforcing the Safety of Sports Grounds Act after a floodlighting mast collapsed at a football club's ground.

740 Common use of S235 cold rolled steel instead of S355 hot rolled steel

It has come to a reporter's attention that some local fabricators are purchasing S235 cold rolled hollow sections rather than the specified S355 hot rolled sections, as they are easier and cheaper to obtain.

634 Contractor installs incorrect steel grade

A reporter came across an issue where the fabricator had used cold formed S235 commodity steel SHS rather than the specified hot formed S275 structural steel SHS.

678 Architect conducts structural design of sway frame for domestic project

A reporter looked at a project recently where the drawings had been produced by the architect, including a structural design.

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