As soon as you activate the Optimization & Costs / CO2 Emissions Estimation add-on, you can access the Estimate of CO₂ Emissions check box for both the material and the cross-section properties.
By selecting the check box, the CO₂ Emissions Estimation tab is added to the material or cross-section dialog box.
Material
For the "Members", "Surfaces", and "Solids" structural objects, check which parameter of the material is relevant for the CO₂ emission estimation: weight, solid, or surface, and so on.
In the "Unit Emission" column, enter the value that a material unit causes in terms of CO₂. There are various emission units for CO₂ equivalents available in the list in the "Unit" column.
The program determines the proportionate CO₂ emissions from the unit emissions and the properties of the structural objects that are assigned to the material. Therefore, the calculation is carried out directly and not via a separate function as in other add-ons.
"Total Emission" shows the CO₂ equivalents that result from the summation of all activated partial emissions of the material. It also shows the proportion of emissions that this material has in relation to the total emissions of all materials that are activated for the estimation.
"Total Emissions" result from the addition of the total emissions of all materials that are activated for the CO₂ emission estimation.
Section
In contrast to materials, cross-sections can only be assigned to members. As a result, the unit emission definition is only possible for member mass types. If there are already some specifications of the CO₂ estimation for the material of a cross-section, the "Transfer from Material" check box is activated by default. This means that the member-related unit emission definitions apply, and thus prevent duplicating the unit emission entries. However, if you want to define the unit emissions and units separately for certain member properties, deactivate the check box.
The values for weight, solid, surface, and length specified in the "Number" column result from the member properties that are assigned to the cross-section.
"Sum Emissions" show the CO₂ equivalents caused by all members of the cross-section. It also shows the proportion of the equivalents that this cross-section has in relation to the total emissions of all cross-sections for which the CO₂ emission estimation is activated.
"Total Emissions" result from the addition of the sum emissions of all cross-sections.