No. Requirement B3(3) requires, where reasonably necessary, subdivision of the building with fire-resisting construction and/or the installation of a suitable automatic fire suppression system.

What is considered reasonable in any particular case will depend on the size and intended use of the building. In some cases, either sprinklers or compartment walls and floors will be necessary and other cases it may be necessary to provide both or neither. Guidance on where sprinklers should be provided is given the Approved Document.

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