Quick Search

Newsletter No 6 - April 2007

Download PDF Version Download PDF document
Download Word Version Word version unavailable

Report Overview

SCOSS will soon publish its 2007 Biennial Report on trends in structural safety which will include an analysis of lessons that can be learned from reports sent to CROSS. Information from the reports is being used to influence changes in guidance to engineers and will be brought to the attention of relevant Institutions and government departments. Thanks to those who have submitted the reports that make this possible. At a recent meeting with SCOSS the Presidents of the ICE and IStructE confirmed their support and have asked for 6 monthly updates on progress. Quentin Leiper, the ICE President, convened a meeting to encourage major contractors to participate and this is bearing fruit. In early April David Harvey the IStructE President visited the Indian Association of Structural Engineers in Delhi to extend relationships between the two bodies. It followed a presentation on CROSS to the Association which is considering whether a similar system should be implemented in India. This issue has reports on Blind Bolts, Underpinning, Scaffold protection, and Low pitched metal sheet roofs. In addition there is a request for information on deterioration of precast concrete planks, and a comment on the need for clarity in the implementation of CE marking. The next issue, July 2007, will contain a number of reports on Building Regulation and Local Authority matters. If you have a concern that could be shared to help others, and could improve structural safety, send a report to CROSS where it will be handled confidentially, published without any identifying features, and may help other engineers. Details on how to report are given on the web site www.cross-structural-safety.org. More reports are needed, especially on civil engineering topics such as bridges, although all will be welcome. Indeed a steady supply of reports is essential and the Institutions look to firms of consulting engineers and of contractors, to promote CROSS and encourage reporting.

Overview of Reports in this Newsletter

66 Low pitched metal sheet roofs

A reporter is concerned about low pitch metal sheet roofing attached to trussed rafters. He says that the weight of such cladding is about 20 % of that of concrete interlocking tiles so that there may be severe wind uplifts. The low pitch and building size result in large areas of higher wind pressures.

70 CE marking scheme for structural steelwork

Concern has been expressed about the way in which the CE marking scheme for structural steelwork will be monitored, enforced and policed in the UK, since the use of CE marking is only voluntary here (but compulsory in mainland Europe). From this year (2006) the imposition of harmonized European Standards for structural steel hollow sections materials (mandated under the Construction Products Directive - CPD) will mean that CE marking can be applied to show that the sections are fully in compliance with the essential requirements of the Directive.

71 Blind bolts

There was a partial collapse of a steel frame building due to the failure of some blind bolts during the construction period. Loads at the time were well below anticipated failure levels.

72 Underpinning

This reporter (who was the ‘Designer’) attended site to meet a Party Wall Surveyor and the Structural Engineer, acting for the adjoining owner, for a building on one edge of the site. The groundworks contractor had proceeded with underpinning to that adjoining property in advance of the contract being signed but, more alarmingly, had completely ignored the specified 5-bay sequence and timing of the works shown on the reporter’s drawings.

73 Scaffold protection

The bridge in question comprises of two main edge lattice through-girders with troughing between the bottom flanges. The temporary scaffold is suspended from the bottom flanges, on proprietary girder couplers, to provide a crash deck below to give full access to underside, together with a temporary roofed shelter surrounding the main girder above road level on one side at a time to allow single lane traffic, controlled by traffic lights, to run over.

75 Some press reports on wall collapses in January 2006

There were several press reports in January 2006 of fatalities and other incidents concerning brick walls.

77 Precast concrete floor and roof planks - durability and potential safety concerns

Over recent years that there have been a small number of instances where sections of the soffits of precast concrete (pcc) floor units have become detached and fallen within buildings. It is understood that no injuries have been caused, but the potential for injury to building occupants exists. There is a need to collate information upon such instances so that an understanding of the frequency of such collapses can be established.

78 Wind damage

Following request for examples of wind damage this collapse was reported of the external brick skin of gable wall of a two storey timber frame terraced house.

79 Scaffold collapse

There has been a further report on a scaffolding collapse.

6000 Residents' cars were damaged by the falling wall (news)

6001 Two-year-old boy has died after a wall collapsed (news)

6002 Tenement wall collapse (news)

Previous page

Email Updates

How to Report

Online submission:
Submit by post: