The Hall of Cornwall Theatre, Truro.
At a Glance
Kier South West
- , Truro
- Design, Installation, Supply
- GRP Rooftop Access Platform
Kier wanted to ensure the impact of the loading from the rooftop plant deck was as low as possible. They also wanted to keep the number of roof penetrations to a minimum.
In addition, site access was very restricted with a 2.5m wide archway being the only access for plant and materials.
Relinea’s design team supported Kier in the development of a plant deck support system that was a hybrid of steel and GRP.
The use of steel for the main supports spanned the main runs of 10 m plus and Relinea’s Re-Struct GRP pultruded beams were then used for all the intermediate supports.
This hybrid system significantly reduced the overall weight of the support frame in comparison to a full steel system. The combination of using steel for the long main spans reduced the number of support penetrations through the roof, whilst the use of GRP beams reduced the weight by 80%.
In addition, the use of Relinea’s Re-Grid GRP open mesh grating provided a further weight reduction of 60% in comparison to a steel alternative.
Our design team provided full details of the support system to the steelwork contractor which ensured the steel could be predrilled to suit the GRP supports.
Due to very tight restrictions on-site, the grating was pre-fabricated and sent to the site in batches, and loaded onto the roof using a crane. Our fully trained installation team then completed the installation of the GRP support system and grating.
The combination of steel and GRP worked exceptionally well in meeting Kier’s 2 main objectives of weight and roof penetration reduction. Relinea’s design team have vast experience in coordinating the multiple stakeholders on-site to ensure a project runs smoothly.