Hidden Lines in Drawings

Hidden lines are not typically used on cross-sections unless they are needed for dimensioning purposes. Some hidden lines on the non-sectioned part of the drawings are also not needed, as they can become redundant information and clutter the drawing.

• What are hidden lines?
• When are hidden lines used on cross-sections?
• When are hidden lines not needed on cross-sections?
• When are hidden lines not needed on the non-sectioned part of drawings?

• Hidden lines are lines that are not visible in the actual object, but are shown in a drawing to help illustrate the object’s shape.
• Hidden lines are typically used on cross-sections to show the internal features of an object.
• Hidden lines are not needed on cross-sections if they do not add any additional information to the drawing.
• Hidden lines are not needed on the non-sectioned part of drawings if they do not add any additional information to the drawing and they would only clutter the drawing.