Office buildings account for a significant proportion of commercial construction activity in Ireland. The sustained growth of the Irish economy, the expansion of the technology and financial services sectors in Dublin and other major cities, and the development of regional business parks and enterprise centres across the country have driven consistent investment in new office accommodation. Every significant office building constructed in Ireland with a structural steel frame requires passive fire protection as a mandatory element of building control compliance.
Office buildings present a specific set of passive fire protection characteristics that arise from their occupancy, their construction form, and the way they are used. They are occupied during the day by large numbers of people who are generally awake and mobile, which creates a different fire risk profile from a residential building or a hotel. They are typically built with steel frames and composite metal deck floors, which require structural steel fireproofing throughout. And they are increasingly designed with a combination of concealed and exposed structural steel, which means the fire protection specification must address both spray-applied and intumescent coating systems on the same project.
This article covers the passive fire protection requirements for office buildings in Ireland, the specific characteristics of office construction that affect the fire protection specification and programme, and how FireShield Ireland services fire protection on office construction projects across Ireland and Northern Ireland.
FireShield Ireland carries out passive fire protection and structural steel fireproofing on office construction projects across all 32 counties of Ireland and throughout Northern Ireland. Our full range of services is at https://fireshieldireland.com/services/commercial-fire-protection/ .
Fire Protection Requirements for Office Buildings in Ireland
Office buildings in the Republic of Ireland are classified under purpose group 5, office, in Technical Guidance Document B. The fire resistance requirements for elements of structure in office buildings depend on the height of the building, measured from ground level to the floor of the top storey.
For office buildings up to 18 metres in height, the required fire resistance for elements of structure is 60 minutes. This covers the majority of office buildings in Ireland outside the Dublin city centre and the major suburban business parks where taller buildings are more common. For office buildings between 18 and 30 metres in height the requirement increases to 90 minutes. For buildings above 30 metres, which includes the taller office towers in the Dublin docklands and city centre, the requirements are more demanding and a fire engineering approach is typically required.
In Northern Ireland, Technical Booklet E applies broadly similar height-based requirements to office buildings. The required fire resistance period for elements of structure is the same as in the Republic for equivalent building heights, reflecting the common European basis from which both regulatory frameworks are derived.
The practical implication of these requirements for office development projects in Ireland is that structural steel fireproofing to either 60-minute or 90-minute standard is a mandatory and non-negotiable element of building control compliance. The cost and programme implications of the structural steel fireproofing must be factored into the development appraisal and construction programme from the outset.
Modern Office Construction in Ireland: Steel Frames and Composite Floors
Modern office buildings in Ireland are predominantly constructed using steel frames with composite metal deck floors. This construction form, which uses a steel portal or moment frame as the primary structure with composite deck slabs at each floor level, is efficient, flexible in terms of floor plate configuration, and compatible with the open plan office layouts that modern occupiers demand.
The steel frame of a composite deck office building consists of steel columns and steel beams at each floor level, with shear studs welded to the top flange of the beams to achieve composite action with the concrete deck slab. The columns and beams must be fireproofed to the required fire resistance period, as must the underside of the metal deck itself where it forms part of the floor structure.
The volume of structural steel on a typical multi-storey office building in Ireland is substantial. A five-storey office building with a 2,000 square metre floor plate at each level and a beam grid at 7.5-metre centres will have a large number of individual beam and column sections spread across five floor levels, all requiring fireproofing. Fireproofing of the metal deck soffit between the beams adds further to the area of steel treatment required. The total fireproofing programme on a building of this scale is a significant element of the construction programme.
Monokote Spray Fireproofing on Office Buildings
On most office construction projects in Ireland, the majority of the structural steel frame is concealed above a suspended ceiling. In a standard office fit-out the ceiling installation, which typically involves a grid and tile suspended ceiling at 2.7 to 3.0 metres above finished floor level, conceals the beams, deck soffit, and much of the column above the ceiling void. This concealed structural steel is protected with Monokote spray applied fireproofing, which is the most practical and cost-effective system for large areas of concealed structural steel.
FireShield Ireland, as the only licensed Monokote applicator in Ireland, carries out Monokote spray fireproofing on office construction projects across Ireland and Northern Ireland. We have applied Monokote on office buildings ranging from small suburban office suites to large-scale city centre commercial developments, and across all regions of Ireland.
The programme for Monokote spray fireproofing on a multi-storey office building follows the structural steel erection sequence, with each floor being fireproofed progressively as the steel is erected and the floor above is cast. The critical programme interface is between the completion of the fireproofing on each floor and the start of the ceiling installation and mechanical and electrical first fix above the ceiling on that floor. This interface must be managed carefully to ensure that no areas of uncoated or inadequately coated steel are concealed above the ceiling without verification.
Details of our Monokote service are at https://fireshieldireland.com/services/monokote-spray/.
Intumescent Coatings on Office Buildings
Contemporary office design in Ireland increasingly features exposed structural steel as an architectural element. Open plan floor plates with expressed structural trusses, reception areas with exposed columns and beams, atria with architectural steel frames, and rooftop terraces with steel canopy structures are all common features of high-specification commercial office buildings in Dublin and other major Irish cities.
This architectural use of exposed steel in office buildings requires intumescent coatings to achieve the required fire resistance while maintaining the visual quality that the architect has designed. The choice of intumescent coating system for office applications is driven primarily by the finish quality requirement, the colour specified, and the gloss level needed to co-ordinate with the office interior design scheme.
In the most demanding office applications, the intumescent coating is specified to match the quality of a high-specification spray-applied paint finish, with a smooth, consistent surface free from sags, runs, or surface defects. Achieving this standard of finish requires careful surface preparation, application by experienced operatives using the correct equipment and technique, and a rigorous inspection and approval process before the coating is signed off.
We carry out intumescent coating work on high-specification commercial office projects across Ireland and Northern Ireland, delivering the finish quality required by demanding architectural specifications. Our experience covers office reception areas, atria, open plan floor plates with exposed trusses, rooftop structures, and all other office applications where exposed structural steel requires fire protection with a quality architectural finish.
Details of our intumescent coating service are at https://fireshieldireland.com/services/intumescent-coatings/.
The Dublin Office Market
Dublin is by far the most active office construction market in Ireland. The concentration of international technology companies, financial services firms, and professional services organisations in Dublin has driven sustained demand for Grade A office accommodation in the city centre, the docklands, and suburban business park locations.
Major office developments in the Dublin docklands, around Grand Canal Square and the North Docklands, have delivered large-scale commercial office buildings for major technology and financial services occupiers. The city centre has seen significant office development alongside retail and hospitality uses. Suburban business park locations including Sandyford, Citywest, Cherrywood, and Blanchardstown have delivered substantial volumes of suburban office accommodation.
We carry out passive fire protection and structural steel fireproofing on commercial office projects across Dublin city and county, including major docklands developments, city centre office buildings, and suburban business park projects. We are familiar with the programme demands of Dublin office construction, the documentation requirements of Dublin building control authorities, and the working practices of the major main contractors active in the Dublin commercial office market.
Regional Office Construction in Ireland
Office construction is not limited to Dublin. Cork, Galway, Limerick, Waterford, Kilkenny, and many other regional cities and towns have seen office development driven by the decentralisation of technology and professional services employment, the growth of regional business parks, and public sector investment in regional office accommodation.
The Cork office market has been particularly active, with significant new development in the South Docklands and other city centre locations, as well as continued development of suburban business parks along the N40 and in locations such as Mahon and Ballincollig.
Galway has seen office development in the city centre and in the Galway Business Park, driven by the growth of the medical devices and technology sectors in the city. Limerick has benefited from public sector investment and the expansion of technology and financial services employment.
We carry out passive fire protection and structural steel fireproofing on commercial office projects across all regions of Ireland, with the ability to resource and manage projects anywhere on the island from our base in Omagh, Co. Tyrone.
Belfast and Northern Ireland Office Construction
Belfast has developed significantly as a commercial office location. The growth of the technology and financial services sectors in the city, combined with significant investment in the Titanic Quarter and city centre development, has driven demand for new Grade A office accommodation. The Belfast City Deal commitments and associated investment in the city’s business infrastructure continue to generate office development activity.
We carry out passive fire protection and structural steel fireproofing on commercial office projects across Belfast and throughout Northern Ireland, working with the main contractors and developers active in the Northern Ireland office market. Our base in Omagh gives us straightforward access to Belfast and all of Northern Ireland for office construction projects.
The Shell and Core vs Fit-Out Interface
Many commercial office developments in Ireland are procured on a shell and core basis, with the landlord delivering the building to a base specification and the tenant carrying out a bespoke fit-out of their leased space. The passive fire protection implications of this procurement arrangement require careful management.
At shell and core stage the structural steel frame of the building must be fireproofed to the required standard before the building is handed to the tenant for fit-out. The suspended ceiling at shell and core stage is typically a temporary or base-spec ceiling that will be replaced by the tenant’s fit-out contractor. The interface between the shell and core fireproofing and the tenant’s fit-out must be managed to ensure that no areas of structural steel are left uncoated between the two stages of work.
At the fit-out stage the tenant’s contractor carries out the partitioning, ceiling installation, and services installation for the tenant’s specific requirements. Any partitions or services installations that penetrate compartment boundaries must be fire stopped correctly. The fit-out contractor is responsible for this fire stopping, but the landlord should include requirements in the building’s fit-out guide for tenants that make the fire stopping obligations explicit.
We carry out shell and core structural steel fireproofing on speculative office developments across Ireland and Northern Ireland, and are available to advise on the fire protection requirements for subsequent tenant fit-outs.
Documentation for Office Building Control
The documentation provided by FireShield Ireland at the completion of any office building structural steel fireproofing installation includes the product data sheets and certification for the specific Monokote grade or intumescent coating system applied, the fire resistance calculations confirming the required fire resistance period for each structural section type, the project-specific thickness schedule, the quality control records from the installation, records of any remedial work, and a completion certificate.
This documentation is provided as standard on every project, prepared in a format suitable for submission to building control authorities in both the Republic of Ireland and Northern Ireland, and delivered at completion without needing to be requested. It forms part of the building’s health and safety file and provides the basis for managing the building’s passive fire protection through its operational life.
Getting Started on Your Office Project
For any passive fire protection requirement on a commercial office building project in Ireland or Northern Ireland, contact FireShield Ireland at the earliest stage of the design or pre-construction process. We provide specification support, preliminary pricing, programme estimates, and technical advice at design stage and are available to attend design team and pre-construction meetings anywhere in Ireland.
https://fireshieldireland.com/services/passive-fire-protection/
https://fireshieldireland.com/services/structural-steel-fireproofing/
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