TGD B and IS 3218 — fire strategy and alarm design
Fire is where a design pack is read most carefully, because the requirements sit across several documents that have to tell the same story. TGD B (Fire Safety) provides guidance to Part B — Volume 1 covers buildings other than dwelling houses and Volume 2 covers dwelling houses. For most non-domestic and apartment work a Fire Safety Certificate is required from the Building Control Authority, supported by a fire strategy and the FSC drawings.
Alongside the strategy, the fire detection and alarm system is designed to IS 3218, the Irish Standard for fire detection and fire alarm systems for buildings. The category of system (for example an L-category life-protection system) is a decision that flows from the fire strategy and then has to be reflected consistently on the electrical drawings, the specification and the schedules.
The common document-quality gaps are interface gaps: a compartment line on the architectural drawing that the services penetrations don't respect, a damper shown on the mechanical layout with no corresponding builder's-work opening, or an alarm category named in the strategy but specified differently downstream. None of these is a design error in itself — they are places where separately-drawn documents disagree, and where a registered fire engineer will want to look closely.