Contractor Laing O’Rourke has launched a carbon calculator to help the industry decarbonise project designs.
According to the contractor, the calculator can analyse the levels of embodied carbon within a digital model and allow a project’s technical team to reduce the carbon content of schemes.
The digital tool which has been developed in line with latest industry guidance, focuses on the embodied carbon content of the sub- and super-structure elements, which can account for more than half of the upfront embodied carbon in a typical building project.
Since May 2021, Laing O’Rourke’s in-house technical leaders have used the calculator on 14 bid submissions, quickly identifying changes that reduced the embodied carbon in the original designs by up to 19%.
Phase one of the carbon calculator uses an internal Laing O’Rourke app, which automates the analysis of the digital model. It extracts and indexes key information relating to a project design, such as component quantities and classification information.
Laing O’Rourke Europe technical director at Joanna Vezey said: “The app creates an auditable trail of all model revisions through the design phase. This brings benefits not only to carbon measurement, but also change, data validation and cost control.
“It does this by processing thousands of models each day across both of our operating hubs, constantly checking for new models and changes to existing ones. It currently holds several billion data points.”
In the second phase of the two-stage process, the app connects to a second database which houses all of Laing O’Rourke’s carbon material data.
The company’s material database has been developed using information provided from the Inventory of Carbon and Energy (ICE) database and continues to grow as the business adds Environmental Product Declaration (EPD) data from its supply chain partners.
“The final data is automatically recorded within the database and fed into a user-friendly dashboard, which we can use to assess the embodied carbon in the baseline design,” Vezey said.
“It displays the data in real time and presents a carbon heat map of a project – which clearly identifies the embodied carbon of each component and where the greatest reductions can be achieved. This has allowed our teams to present alternative options to clients to reduce embodied carbon.”
The detailed analysis is building on the benefits of Laing O’Rourke’s offsite manufacturing capability and operating model.