Guides / Permits and checks

Design check categories

Not every item of temporary works needs the same level of checking. The standard sorts them into design check categories, numbered 0 to 3.

The idea in plain English

• Category 0: standard, proven solutions used as intended.
• Category 1: simple designs.
• Category 2: more complex, with an independent checker who was not involved in the design.
• Category 3: the most demanding, where the check is done by a separate organisation.

Important

The category depends on complexity and risk, not on height alone. There is no simple height rule.

The category is decided by the Temporary Works Coordinator, with the designer, and recorded on the design brief and the design and check certificate.

[Technical reviewer to confirm all category wording against BS 5975-1:2024 before launch.]