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Blackrock College, Blackrock, Co Dublin

T. J. O’Connor & Associates were responsible for the design and monitoring the construction of a new three storey classroom block in this 1000 pupil post-primary school. This classroom block incorporates 6 science & technology classrooms at ground floor and a 70 pupil study in addition to 9 classrooms accommodated on the second and third floors.

The building encloses the fourth side of a quadrangle formed by the protected Castledawson House and College Chapel, and Jubilee Hall from the 18th, 19th and early 20th century buildings respectively. The existing structure had to be appraised for the upgrade of use of the building and design and detailing of connections of new buildings with existing buildings had to be completed.

The building structure is a three storey reinforced insitu concrete frame with structural steel roof structure. A reinforced concrete scissor stairs is incorporated into the building, with exposed fair face concrete walls. Additionally the front elevation is designed with a hanging wall section, incorporating intricate structural steel supports for the glazed elevation and roof adjacent to the 1900’s Jubilee Hall building. The concrete frame is stabilised by the lift shaft and staircore located at either end of the building.

T. J. O’Connor & Associates also involved in the preparation of a masterplan for development of the existing college campus.

The condition of the existing surface and foul water network was also investigated resulting in an upgrade of the main infrastructural drainage system the college.
Additional work completed on the building include:


Holy Ghost Fathers

Start/End Date:

2000 – August 2007

Contract Value:



Structural & Civil Engineers

Key Structural Features:

Find out about our Structural Engineering services.