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Structural engineers in Belfast

Structural calculations, surveys and design for homes, developments and commercial buildings across Belfast, prepared for Northern Ireland Building Control.

Building on Belfast ground

Belfast sits on sleech, the soft estuarine clay and silt laid down across the Lagan valley and the reclaimed land around the harbour. It is compressible, it varies in depth across short distances, and it is the single most important ground condition in the city. Foundations that would be routine elsewhere frequently are not here.

Where sleech is deep, piled solutions or ground improvement are often the practical answer rather than deeper strips. Where it thins towards the higher ground of the Malone ridge, Antrim Road and the eastern slopes, conditions change quickly, so an assumption carried from one part of the city to another is a poor basis for design. A site investigation matters more in Belfast than in most UK cities.

The housing stock

Belfast has a large stock of late Victorian and Edwardian red-brick terraces, including the kitchen house type built for the linen and shipyard workforce. These have solid or early cavity walls, timber floors, and internal walls that frequently carry more load than their thickness suggests.

Removing a wall, forming a through-lounge or converting an attic in these houses means establishing what is actually carrying load before anything is designed. Many have been altered already, often without calculations, and previous work is a common finding rather than a rare one.

Northern Ireland Building Control

Northern Ireland has its own Building Regulations, administered by the district councils rather than by the arrangements used in England, Wales or Scotland. Technical Booklet D covers structure and is the reference your building control officer works to.

We prepare calculation and drawing packages for submission under that regime, and we deal with the officer's queries directly rather than passing them back through your builder.

Belfast

Local considerations.

What tends to govern a structural job in this area.

Sleech: soft, compressible estuarine deposits across much of the city
Depth to competent ground varies sharply between districts
Victorian and Edwardian red-brick terraces with undocumented alterations
Northern Ireland Building Regulations and Technical Booklet D

Services

The full structural remit in Belfast.

Every service is available here. Choose one to read more, or tell us your project and location.

Selected work

Real structures, surveyed and engineered.

All work →

Sport and recreationCharlton Athletic FC, The ValleyTwo steel monopitch stand roofs rising to 27 metres were assessed for a proposed solar PV installation. Both were cleared to carry the arrays as they stand, and the fragile roofs were surveyed entirely by drone with nobody working at height.

Read →

Manufacturing and industrialWienerberger, Tamworth

EducationCarlisle College

Film and mediaDragon Studios, Pencoed

Questions

Common questions

Do you cover the whole of Belfast?

Yes, across the city and the wider Belfast area. Most calculation work is prepared remotely from drawings, and we attend site where the existing structure needs establishing.

What is sleech and why does it matter?

Sleech is the soft estuarine clay and silt beneath much of Belfast. It is compressible and its depth varies across short distances, so foundation solutions that work elsewhere often need rethinking here. Site investigation carries more weight in Belfast than in most cities.

Do you work to Northern Ireland Building Regulations?

Yes. Northern Ireland has its own regulations administered by district councils, with Technical Booklet D covering structure. We prepare packages for submission under that regime.

Can you assess previous alterations?

Yes, and it is common work in Belfast terraces. Walls removed without calculations and chimney breasts taken out without support are frequent findings.

Elsewhere in the UK