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Elevating Your BIM: A Deep Dive into Modeling Glass Lifts in Revit In modern architecture, the glass lift (elevator) has transcended its functional purpose to become a centerpiece of design. Whether it’s a panoramic elevator in a sleek hotel atrium or a glass-enclosed lift in a high-end retail space, these elements demand attention. However, for Revit users, glass lifts present a unique set of modeling challenges. How do you balance the need for aesthetic transparency with the complexity of mechanical families? How do you ensure your section drawings don’t end up as a mess of overlapping lines? In this post, we’ll explore best practices for modeling glass lifts in Revit, from family creation to project integration. The Challenge of Transparency The biggest hurdle when modeling glass lifts in Revit is managing Visibility Graphics . Standard elevator families are often "opaque" boxes. If you simply apply a glass material to a standard family, you might run into issues where the glass obscures the interior cab details in 3D views, or worse, creates a confusing visual hierarchy in plan views. Tip #1: Master the "Glass" Material Don’t settle for the default "Glass" material in Revit. For a lift, you need to define properties clearly:
Visual Appearance: Ensure your material has a legitimate "Glass" appearance asset. This allows the rendering engine to calculate refraction and reflections accurately. Surface Patterns: In plan and elevation views, apply a subtle Model Pattern (Grid) to represent the mullions or frame structure, but keep the glass panes themselves pattern-free to avoid visual clutter. Transparency in Views: If your glass is appearing too solid in Hidden Line views, check your Visibility/Graphics (VG). Under Model Categories > Windows (or Generic Models) , ensure "Transparent" is checked for the sub-category controlling your glass panes.
Building the Family: The Cab When creating a glass lift cab, you are essentially building a high-detail window that moves. Here is the recommended hierarchy: 1. The Frame (Aluminum/Steel): Create the structural frame using sweeps or extrusions. Use the Mullion logic common in curtain walls—thin profiles that hold the glass. Pro Tip: Use shared parameters for "Frame Finish" so you can tag the material later in the project. 2. The Glass Panels: Avoid using "Wall" elements inside the family. Instead, use Extrusions with a thickness of roughly 12mm-18mm. glass lift revit
Voids are your friend: Use void extrusions to cut the glass where handrails or control panels need to attach. Shadow Casting: In the Object Styles of the family, ensure the glass category is set to cast shadows, but with a lower transparency value in the render settings to avoid harsh black shadows.
3. The Interior Mechanics: A glass lift is useless if you can't see inside. Model the essentials:
Handrails (mirror finished steel is a common standard). Floor finish (tile or stone). Control panel and lighting cove. Create Openings for Elevators * Open the Second
Coordinating the Shaft and Machine Room The glass lift isn't just the cab; it's the system. The Pit and Overrun Using Section Views , ensure you model the pit requirements accurately. A glass lift often requires specific guide rail supports that are visible in the shaft. These should be modeled as 3D elements, not just drafted in 2D, as they will clash with other MEP (Mechanical, Electrical, Plumbing) elements in the shaft. The Machine Room While the cab is transparent, the machine room usually isn't. If the lift is hydraulic or traction-based, the motor room needs careful coordination.
Use Copy/Monitor to coordinate the structural floors for the machine room level. If the lift is "Machine Room Less" (MRL), ensure you model the control cabinet clearances within the shaft head.
Plan View Presentation: The "Cut" vs. "Uncut" This is where many BIM technicians struggle. How should a glass lift look in a Floor Plan? Vercel Downloads | Savaria Vuelift Product Documents
Above Cut Plane: If the lift cab is above the view range cut plane, you should see the shaft walls and the guide rails. At Cut Plane: If the cut plane slices through the cab, you will see the frame and the glass. To differentiate the glass from empty space, use the Filled Region tool in the family editor or apply a surface pattern to the glass extrusion.
Trick: Create a specific Sub-Category in your family called "Plan Glass." Assign a light diagonal hatching pattern to this sub-category. In your project views, you can toggle this on or off depending on your office CAD standards. Why Bother? (The BIM Value) You might ask, "Why not just use a 2D detail component?" While 2D is faster, modeling the glass lift in 3D provides immense value: