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Recent Reports

505 Precast Concrete Cover Slab to Circular Shaft

The cover slab for a storage shaft was designed as an interlocking arrangement of seven precast concrete slabs with half joints between the individual units. When the slabs arrived on site they were lifted into place but approximately 10 minutes after the last slab had been placed, five of them collapsed into the shaft.

499 Failure of high strength studs

A reporter’s firm specified the use of M12 grade 8.8 threaded studs that were to be located in a tapped web of a parallel flange channel. The installation proceeded normally and the nuts were not over tightened. The firm then received reports that many of the studs were snapping overnight with the outer nuts falling onto the floor.

Current matters
under consideration

  • High strength steels
  • Wind problems in city centre construction
  • Objects/components falling from buildings
  • Weather damage to buildings
  • Structures at the end of their design life
  • Hazard identification

Reports on these new subjects are sought, as well as on any other concerns.



June 2015 ICE Health and Safety Conference 30 June

June 2015 SCOSS Topic paper Structures at the end of their design life published

April 2015 CROSS Newsletter No 38 published

also Structural-Safety Group Review 2014 published

We depend on individuals and firms participating by sending reports of their experiences and concerns in confidence to Structural-Safety. The names of reporters are never revealed and only the technical aspects that could help structural engineers are published. 

If you have an experience that could be useful to others please contribute by sending a report to www.structural-safety.org/confidential-reporting/ submit-report/.


Structural-Safety works with the professions, industry and government on safety matters concerned with the design, construction and use of building and civil engineering structures. It:

  • collects confidential data on the concerns of structural and civil engineers and others
  • provides comments in relation to these concerns
  • maintains a data base of reports and publications
  • collects data from public sources on failures, collapses and relevant incidents
  • considers whether unacceptable risk exists, or might arise in the future
  • promotes a positive attitude to learning from experience
  • influences change to improve structural safety.

Structural-Safety combines CROSS and SCOSS. Click here for more details.


How to Report

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