| Line Type | Appearance | Meaning | | :--- | :--- | :--- | | | Thick, solid | Visible edges of the object/wall. | | Hidden Line | Medium, dashed (1/8" dashes) | Features behind a surface (e.g., a window above a cabinet). | | Centerline | Long-short-long dash | Symmetry of a circle, door swing arc, or structural grid. | | Dimension Line | Thin, solid with arrows at ends | Shows length/width. | | Extension Line | Thin, solid (touches object) | Shows where the dimension starts/stops. | | Cutting Plane Line | Thick, dashed with arrows | Shows where an imaginary cut was made for a section view. |
Drafting uses a specific "alphabet" where different line styles convey different meanings. blueprint reading basics worksheet answers
| Line Type | Appearance | Meaning | | :--- | :--- | :--- | | | Thick, solid | Visible edges of the object/wall. | | Hidden Line | Medium, dashed (1/8" dashes) | Features behind a surface (e.g., a window above a cabinet). | | Centerline | Long-short-long dash | Symmetry of a circle, door swing arc, or structural grid. | | Dimension Line | Thin, solid with arrows at ends | Shows length/width. | | Extension Line | Thin, solid (touches object) | Shows where the dimension starts/stops. | | Cutting Plane Line | Thick, dashed with arrows | Shows where an imaginary cut was made for a section view. |
Drafting uses a specific "alphabet" where different line styles convey different meanings.