Key standards
- EN 1990/1991 Eurocodes (structural design), ISO 45001 (occupational safety), BS 5975/ISO 12461 (temporary works guidance)
Documented issue
A London construction company was fined after a domestic property collapsed during a loft conversion. The first floor fell onto the ground floor, injuring workers. HSE investigators found the structure was not properly supported in its temporary state; there was no Temporary Works Coordinator or design, and temporary remedial work was not managed. The HSE inspector said the incident was “entirely avoidable” if temporary works had been properly managed. press.hse.gov.uk.
Typical challenges
- Temporary works (propping, shoring, scaffolding) are not designed or checked; contractors rely on ad‑hoc methods.
- Project teams lack a competent Temporary Works Coordinator, leading to poor planning and inspection.
- Outdated or conflicting structural codes are used, especially during refurbishment.
Best Practice playbook
- Design and check temporary works according to BS 5975/ISO 12461. All temporary structures must be designed, installed and maintained to withstand foreseeable loads and used only for their intended purpose. hse.gov.uk.
- Appoint a Temporary Works Coordinator (TWC). The TWC ensures proper design, checks, and communication. hse.gov.uk.
- Plan and sequence works. Provide clear method statements for demolition, excavation and propping.
- Train site staff to recognise signs of instability and stop work if unsafe.
- Audit against current codes and client requirements (e.g., Eurocodes, local building regulations) before starting structural alterations.
References
- HSE press release describing the house collapse and lack of temporary works management. press.hse.gov.uk.
- HSE guidance on temporary works obligations (design, installation and maintenance; role of TWC). hse.gov.uk.
