BCLP-093- Revit Essentials -Curtain Grids , Panels, Mullions
Shiju Sasidharan
Founder & Partner of BIMLABS Project Management Services Dubai with expertise in BIM and Project Planning.
Curtain Wall Panels
§? Curtain wall panels represent essential components in contemporary architectural design, particularly within Building Information Modeling (BIM) software like Revit.
§? They serve as integral parts of curtain wall systems, offering a blend of functionality and aesthetic appeal.
§? Mastering the intricacies of curtain wall panels is crucial for architects, designers, and engineers aiming to create innovative and visually stunning building facades.
Customization and Selection:
§? Curtain wall panels exhibit versatility in adapting to different wall types within BIM software environments.
§? Panel selection involves utilizing the Type Selector tool to choose from a range of predefined panel types.
§? Unlike traditional wall elements, the size of curtain wall panels isn't explicitly controlled through drag controls or direct property adjustments. Instead, panel dimensions are indirectly affected by modifications made to the entire curtain wall system.
Insertions and Modifications:
§? Curtain wall panels offer the capability to incorporate various inserts, such as windows, doors, or other architectural elements, enhancing both functionality and design aesthetics.
§? Insert positioning is relative to the overall curtain wall, ensuring consistency in design alignment.
§? Modifications to panels, including resizing or reshaping, are primarily achieved through adjustments to curtain grids. Notably, inserts within panels maintain fixed positions even when the panel is resized.
Splitting and Joining Panels:
§? Curtain wall panels can be split using curtain grids, providing designers with greater flexibility in design and layout.
§? Mullions, which are vertical or horizontal members that divide panels, can be added to curtain grids to enhance structural integrity and visual appeal.
§? Merging panels is a technique used to accommodate design requirements such as non-continuous grid lines or the inclusion of large inserts like doors within the curtain wall system.
Advanced Techniques:
§? Linear curtain wall panels, typically utilized for specific architectural designs, are created using the system panel type exclusively.
§? When joining panels of different types, the resulting panel type follows the type initially selected during the process.
§? Utilizing hidden line view enhances clarity when visualizing joined panels and grid configurations, aiding in precise design representation.
Grid Layout Management:
§? Grid layout customization plays a pivotal role in achieving varied designs and configurations within curtain wall systems.
§? Parameters such as justification schemes, angles, offsets, and grid spacing can be adjusted to achieve the desired grid layout.
§? In-canvas controls and graphical interfaces streamline the process of modifying grid layouts, providing designers with intuitive tools for precise adjustments.
Curtain Grid Placement:
§? Curtain grid placement options offer designers precise control over the distribution of grid segments within the curtain wall system.
§? Options include placing segments on all panels, individual panels, or excluding specific panels as needed, facilitating intricate design arrangements.
Mullions in Curtain Wall Systems
§? Mullions serve as crucial components within curtain wall systems, offering structural support and architectural delineation between panels.
§? In Revit, understanding the nuanced properties, types, placement, and customization options of mullions is paramount for architects and designers aiming to create aesthetically pleasing and structurally sound building facades.
Placement and Resizing:
§? Mullions are added to curtain wall grids using the Mullion tool located in the Architecture tab of Revit's interface.
§? Upon placement, mullions dynamically resize to fit the dimensions of the grid lines, ensuring seamless integration within the curtain wall system.
§? Inside grids position mullions at the center, while perimeter grids align mullions flush with the exterior face of the wall, maintaining consistency and visual harmony.
Angle and Position Properties:
§? Mullions offer versatile adjustments in terms of angle and position to accommodate diverse design requirements.
§? Angle properties allow mullions to be oriented perpendicular to the face of the curtain panel or parallel to the ground plane, especially useful for sloping curtain panels.
§? Position properties enable precise alignment adjustments after placement, ensuring optimal integration with adjacent architectural elements.
Corner Mullion Types:
- Revit provides several types of corner mullions, each tailored to specific design scenarios and aesthetic preferences.
- L Corner Mullion: Features legs meeting the ends of curtain walls or sloped glazing, with customizable length and thickness properties.
- V Corner Mullion: Legs meet the sides of curtain walls or sloped glazing, offering flexibility in length and thickness specifications.
- Trapezoid Corner Mullion: Designed for panels meeting at the sides of the mullion, with customizable center width, length, and thickness properties.
- Quad Corner Mullion: Accommodates panels meeting at the sides of the mullion legs, with options for defining mullion depth in segments, resulting in various shapes based on join angle and segment lengths.
Mitered Mullions and Join Control:
§? Mitered mullions ensure seamless transitions between joined curtain walls or sloped glazing, enhancing visual coherence and structural integrity.
§? Mullions automatically miter at junctions, maintaining design continuity and aesthetics.
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§? Control over mullion joins enables precise management, ensuring clean intersections, especially when multiple mullions converge.
Mullion Profiles and Customization:
§? Mullion profiles dictate the shape and appearance of mullions, offering opportunities for customization and design differentiation.
§? Profiles can be loaded from existing libraries or created as custom profiles to meet specific design intent.
§? Detail components within profiles enhance visual representation, providing comprehensive insight into mullion construction and aesthetics.
Mullion Instance Properties:
§? Mullion instance properties provide granular control over individual mullions within a curtain wall system, allowing architects and designers to customize specific aspects to meet design requirements. These properties include:
§? Comments:
o?? This field allows users to add specific comments or notes related to the mullion, providing valuable context or information for project documentation and collaboration.
§? Length:
o?? The maximum length of the mullion, which is typically a read-only value. For instance, on a mitered mullion, the length refers to the pre-cut length of the mullion. While users cannot directly modify this property, understanding the length is essential for accurate placement and alignment within the curtain wall system.
§? Mark:
o?? The mark property allows users to assign a unique label or identifier to the mullion. Each mullion in the project must have a distinct mark value. Revit warns users if duplicate marks are detected, ensuring data integrity and preventing errors in labeling. This property facilitates efficient organization and management of mullions within the project.
§? To modify instance properties, users can select the mullion element and access its properties through the Properties palette. Here, they can input comments, adjust the maximum length (if applicable), and assign a unique mark to the mullion, enabling precise customization and documentation of individual mullions.
Mullion Type Properties:
§? Mullion type properties govern the characteristics and behavior of mullion families within the curtain wall system, allowing for consistent control and management across multiple instances. These properties include:
§? Common Properties:
o?? This category encompasses fundamental properties such as angle, offset, profile, and position, which define the overall appearance and placement of the mullion family within the curtain wall system. Modifications to these properties apply universally to all instances of the mullion family in the project.
§? Circular Properties:
o?? For circular mullion families, users can define parameters such as radius and offset from curtain panels, enabling customization of circular mullion profiles to suit specific design requirements.
§? Rectangular Properties:
o?? Rectangular mullion families offer additional properties such as angle, offset, profile, position, and more, providing comprehensive control over the geometry and appearance of rectangular mullions within the curtain wall system.
§? L and V Corners Properties:
o?? Mullion families designed for L corners and V corners feature properties such as the length of each leg, offset, and mullion thickness, allowing users to tailor corner mullions to fit seamlessly within the curtain wall system.
§? Trapezoid Corners Properties:
o?? Trapezoid corner mullion families offer properties to define center width, depth, offset, and thickness, enabling precise customization of trapezoidal corner mullions for intricate design configurations.
§? Quad Corners Properties:
o?? Quad corner mullion families provide options to define the length of each leg, offset, and mullion thickness, facilitating customization of quad corner mullions to accommodate diverse design scenarios.
§? To modify type properties, users can select a mullion element and access its properties through the Modify tab, specifically the Properties panel.
§? Here, they can adjust angle, offset, profile, position, and other parameters to define the characteristics of the mullion family.
§? Changes to type properties apply uniformly to all instances of the mullion family within the project, ensuring consistency and coherence in design implementation.
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Prepared by : Shiju Sasidharan ?and BIMLABS Global Research Institute Team
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