This focus group is a forum for those who use the Revit plug-in Tally to account for the embodied carbon impacts of their designs. This is the place to ask detailed questions related to the tool, post lessons learned & share best practices with fellow Tally users.
To kick things off, I’d like to share a Tally oversight that we spotted recently when running Tally studies - for the domestic softwood material definition, the default lifespan assumption is 30 years. This may be appropriate for wood products that are exposed to the elements, but is not representative of wood framing members on the interior of wall assemblies. This simple lifespan assumption was very consequential in our Tally results, and can cause your LCA study to inadvertently double-count the impact of wood members if the building lifespan is set to default of 60 years.