What type of profile do you need to create when using the Roof by Extrusion command?

What type of profile do you need to create when using the Roof by Extrusion command?

• A. Open profile with a triangular cross-section
• B. Closed profile with a circular cross-section
• C. Open profile with a rectangular cross-section
• D. Any closed profile

Answer: (C)

To create a roof using the Roof by Extrusion command in Revit, you need to use a specific type of profile that guides the shape of the roof being generated. The correct option involves selecting a closed profile, which allows for the definition of the roof's edges and overall form. In this case, using an open profile, such as a rectangular cross-section, means that the profile would not fully enclose an area necessary for creating a roof. A closed profile is essential because it provides the boundary needed for the extrusion, ensuring that the roof maintains a consistent shape along the defined path. While a triangular cross-section might be suitable in certain scenarios, it still needs to be closed for the Roof by Extrusion command. Circular cross-sections are typically related to cylindrical roofs and won't suffice for traditional flat or sloped roofs created through extrusion. Therefore, a closed profile in a more common shape, like rectangular, visually conveys that it's meant for roof structures and meets the requirements for the extrusion to produce a valid roof element.

To create a roof using the Roof by Extrusion command in Revit, you need to use a specific type of profile that guides the shape of the roof being generated. The correct option involves selecting a closed profile, which allows for the definition of the roof's edges and overall form.

In this case, using an open profile, such as a rectangular cross-section, means that the profile would not fully enclose an area necessary for creating a roof. A closed profile is essential because it provides the boundary needed for the extrusion, ensuring that the roof maintains a consistent shape along the defined path.

While a triangular cross-section might be suitable in certain scenarios, it still needs to be closed for the Roof by Extrusion command. Circular cross-sections are typically related to cylindrical roofs and won't suffice for traditional flat or sloped roofs created through extrusion. Therefore, a closed profile in a more common shape, like rectangular, visually conveys that it's meant for roof structures and meets the requirements for the extrusion to produce a valid roof element.