The Institution of Structural Engineers has published technical guidance for preparing the structural aspects of Gateways 2 and 3 submissions for higher risk buildings (HRBs).
The document – – details the statutory framework for such submissions for both newbuild and in-scope work to existing HRBs, and provides recommendations on content.
The Building Safety Act and secondary legislation have introduced three specific stop/go decision points or gateways:
- Gateway 1 — at the planning application stage
- Gateway 2 — at the design stage and before building work starts. Gateway 2 applications must demonstrate how the proposals comply with building regulations requirements.
- Gateway 3 — at completion. Gateway 3 must demonstrate how the building work complies with building regulations requirements to provide assurance that buildings are safe to occupy.
IStructE technical director Patrick Hayes, one of the authors, said: “This is a critical process, so this guide supports structural engineers to prepare Gateways 2 and 3 submissions. These must verify that a building design complies with building regulations.
“Each gateway must be passed before a development can proceed to the next stage. This is therefore important guidance as in the UK approximately 2,000 HRBs are constructed annually – buildings at least seven stories /18 metres, and containing at least two residential units. There is also an existing stock of 12,500 HRBs for which new construction works need approval.â€

The guide covers interlinked aspects of the Gateway 2 and 3 submission stages, such as the statutory framework, legal issues, recommended content, quality control and compliance, and the possible impact on design and procurement practices.
It is priced at £26.95 for IStructE members/£44.95 for non-members.
Hayes concluded: “The Building Safety Act introduced radical changes, including the building being seen as a system, that design is holistic, and that procurement does not compromise compliance and safety. Our guide takes all this into account so that professionals are informed and prepared.â€
IStructE is also planning further guides to Building Safety Act requirements, including the safety case, golden thread and competence requirements for those working on HRBs.
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