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Revit 2D linework consists of annotation elements, including detail lines, symbolic lines, and the linework tool, used to generate drafted details within specific views. This documentation defines line styles, weights, and colors to represent architectural features without modifying the underlying 3D model geometry.
Revit 2D linework identifies the current state of a building through precise documentation in 2D drafting views. The process involves utilizing detail lines, filled regions, and component families to trace imported data, such as 3D laser scans. These elements specify the exact physical dimensions and annotations of existing conditions, providing a detailed graphical record of the structural and architectural components. In a revit 2D linework
Walls: Precise thicknesses of all exterior and interior walls.
Structural Elements: Columns, beams, piers, and floor joists.
Floors & Stairs: Floor levels, steps, and stair dimensions (riser/tread).
Ceiling Details: Changes in level, beams, and ceiling heights.
Roofs: Roof lines, ridge lines, parapets, and slopes (using slope arrows).
Doors: Exact locations, widths, and swing directions.
Windows: Locations, frame positions, sash widths, sill heights, and header heights.
Millwork/Fixed Furniture: Cabinets, vanities, shelving, and built-in units.
Fireplaces: Chimneys, hearths, and surrounds.
Trim/Details: Skirting, coving, and decorative elements.
Plumbing: Sanitary fittings (sinks, toilets, showers) and locations of pipes.
Electrical: Switches, sockets, electrical panels, and light fixture locations.
HVAC: Registers, grills, vents, meters, and equipment (e.g., air conditioning units).
Services Entry: Location of gas, water, and electric meters.
Dimension Strings: Comprehensive string dimensions (exterior/interior) connecting structural points.
Room Tags: Names and numbers for all spaces.
Level/Elevation Markers: Floor heights relative to a datum.
Notes: Details on materials, conditions (e.g., "cracked plaster"), and floor finishes.
Key/Legend: Explanations for symbols, abbreviations, and line styles.
Phasing: Ensure all 2D elements are set to the "Existing" phase in the Properties Palette.
Line Weights/Styles: Use consistent line weights (e.g., 0.35-0.50mm for cut walls, 0.25-0.35mm for projections) to enhance readability.
Components: Use Detail Components for repetitive, non-modeled items like brick patterns or standard fasteners.
Reference Views: Use Drafting Views for details that do not change based on the model, such as typical connection details.
Element
Description
Walls
True thickness of all walls.
Openings
Doors (swing), Windows (frames).
Vertical
Stairs, Ramps, Levels, Heights.
Service
HVAC, Pipes, Sockets, Meters.
Fixed
Cabinets, Fixtures.
Info
Dimensions, Room Names, Material Notes.
Detail Lines: Used in specific drafting views or callouts to add information (e.g., hidden lines, dashed lines for overhead elements) that only appear in that view.
Symbolic Lines: 2D lines used within families to represent the object symbolically in 2D views, distinct from the 3D geometry.
The Linework Tool (LW): A tool that allows the user to override the edge style of a 3D model element in a specific view, such as changing a projection line to a hidden line.
Scale Dependency: Similar to AutoCAD, these 2D lines are view-specific and their on-screen appearance changes with the view scale.
2D Drafting Views: Separate views used to draft details from scratch, commonly used for complex connections that are too time-consuming to model in 3D.
