FIGURE 1Tally is a Revit application that allows architects and engineers to quantify the environmental impact of building materials during the design process. While working on a Revit model, one can define relationships between BIM elements and construction materials from the Tally database. These relationships are used to quantify environmental impacts across several categories, such as embodied energy and global warming potential.

Introduction General discussion of Tally concepts, workflow, and reports.

TallyTM Tutorial: Introduction©2014 KT Innovations

FIGURE 2Tally can be used for full building analysis as well as comparative analyses of Revit design options It can account for the diverse range of materials defined in a BIM model, as well as materials that are not modeled explicitly.

FIGURE 3Here we show what it looks like to run Tally from inside a Revit model. Tally’s project browser displays a list of the elements in Revit model that fall within the scope of our assessment, along with their constituent Revit materials. The workflow consists of defining reference and takeoff information for each entry so that material quantities can be calculated, and subse-quent changes to the Revit model will be accounted for.

FIGURE 4After completing all of the material assignments, we can save an output report that summarizes the environmental impacts of our project, according to five TRACI impact categories and three Cumulative Energy Demand categories. These results can be broken down by Life Cycle Stage, Revit Category, and CSI Division, giving us various ways to analyze and refine our designs and material selections.