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
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:

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.