
Oran Pre-Cast proposed a precast concrete frame as a viable alternative to the cast in situ RC flat slab design
CLIENT | Grangegorman Development Agency |
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MAIN CONTRACTOR | SISK |
ARCHITECT | Moloney O'Beirne |
ENGINEER | Horgan Lynch |
PRECAST VALUE | €1.1m |
ONSITE DURATION | 10 weeks |
The building is framed around 2 irregular shaped internal courtyards, intersected at an angle by a 3 storey administration block.
This geometry resulted in a high number of bespoke precast elements, with very little repetition between members. Rectangular, half-filled composite, spine and edge beams were all used as required.
Points of interest include:
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Cantilevering floor slabs
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Feature 8m long stairs
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Beams of over 14m in length
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Lattice floor with circular rooflight openings
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Service openings provided in downstand beams and
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Over 400 individual production drawings
The prestressed hollowcore flooring allowed for greater spans than a similar RC slab. This reduced both the number of supporting columns required, and the overall dead load onto the foundations.