157
real life, the solidity is often accounted for in the LCI entry, and this box can be left
blank. For example, in the case of a metal stud layer in a wall, the LCI entries
specify the stud size and spacing and use the dimensions of the wall in Revit to get
material takeoffs. One of the LCI data entries available to users in this case is “Steel
stud framing for drywall/gypsum plasterboard per sq. meter of wall area (incl. air
gaps per m
3
), C-profile: 4 × 2 inch, gauge 25, 10 ft. height × 16 inch (40 cm) spacing.” This dataset accounts for the differences in how metal studs are modeled and
actually built.
The “Apply extra specification” field can be used to add rebar to any concrete
materials, and the share field defines how much rebar is present. The “Unit cost”
field is used for One Click LCA’s life cycle costing tool, which is separate to the
WBLCA. Lastly, the service life of the individual material being defined can be
entered here if it is known. Otherwise, if this field is left blank, a default service life
based on the LCI entry chosen will be applied to the material. The user can later see
or change this service life in the web interface. The process of assigning materials
is the same across all material categories. After all of the Revit materials have been
defined, the “Save” button will store the LCA data with the Revit model.
8.4.4.3 Additional Features
One Click LCA has data transparency embedded in both the Revit and web interface. After selecting an LCI data point, clicking “Show LCA Profile” will bring up
metadata on the dataset. For more information on the importance of data transparency, see Chap. 7. In the Revit interface, several built-in features help the user to
better understand what information from the Revit model One Click LCA is translating into the study. Next to the Revit material name is a “# of objects” count to tell
you how many times that specific material appears in the file. Clicking on the question mark icon next to this pops open a window with the material thickness and total
area. This can be used as a sense check to make sure that the model is accurate.
Using the “Isolate Material” function will temporarily hide all of the Revit model
with the exception of the family that the material in question belongs to.
8.4.4.4 Establish a New Study
The rest of the WBLCA process, including entering general project information as
well as generating results, happens in the One Click LCA web interface. Before
bringing the results to the web, a project must be created to host the study. In the
web interface, studies are organized by project and design. The project holds overarching information regarding the study and can host many different design options
of the same project. The information required in a project includes the project name,
address, gross floor area, number of stories above grade, building type, and frame
type. One Click LCA has built-in functionality to support a large number of green
8.4 WBLCA Tools
real life, the solidity is often accounted for in the LCI entry, and this box can be left
blank. For example, in the case of a metal stud layer in a wall, the LCI entries
specify the stud size and spacing and use the dimensions of the wall in Revit to get
material takeoffs. One of the LCI data entries available to users in this case is “Steel
stud framing for drywall/gypsum plasterboard per sq. meter of wall area (incl. air
gaps per m
3
), C-profile: 4 × 2 inch, gauge 25, 10 ft. height × 16 inch (40 cm) spacing.” This dataset accounts for the differences in how metal studs are modeled and
actually built.
The “Apply extra specification” field can be used to add rebar to any concrete
materials, and the share field defines how much rebar is present. The “Unit cost”
field is used for One Click LCA’s life cycle costing tool, which is separate to the
WBLCA. Lastly, the service life of the individual material being defined can be
entered here if it is known. Otherwise, if this field is left blank, a default service life
based on the LCI entry chosen will be applied to the material. The user can later see
or change this service life in the web interface. The process of assigning materials
is the same across all material categories. After all of the Revit materials have been
defined, the “Save” button will store the LCA data with the Revit model.
8.4.4.3 Additional Features
One Click LCA has data transparency embedded in both the Revit and web interface. After selecting an LCI data point, clicking “Show LCA Profile” will bring up
metadata on the dataset. For more information on the importance of data transparency, see Chap. 7. In the Revit interface, several built-in features help the user to
better understand what information from the Revit model One Click LCA is translating into the study. Next to the Revit material name is a “# of objects” count to tell
you how many times that specific material appears in the file. Clicking on the question mark icon next to this pops open a window with the material thickness and total
area. This can be used as a sense check to make sure that the model is accurate.
Using the “Isolate Material” function will temporarily hide all of the Revit model
with the exception of the family that the material in question belongs to.
8.4.4.4 Establish a New Study
The rest of the WBLCA process, including entering general project information as
well as generating results, happens in the One Click LCA web interface. Before
bringing the results to the web, a project must be created to host the study. In the
web interface, studies are organized by project and design. The project holds overarching information regarding the study and can host many different design options
of the same project. The information required in a project includes the project name,
address, gross floor area, number of stories above grade, building type, and frame
type. One Click LCA has built-in functionality to support a large number of green
8.4 WBLCA Tools