In dimensioning, which type of lines are utilized on installation drawings?

In installation drawings, extension lines are used to indicate the precise measurements of objects. They extend from the object to the dimension lines and provide clarity about what is being measured. This helps in accurately defining the size and position of various components in relation to each other.

Extension lines are crucial because they prevent clutter in the drawings while still conveying necessary information, allowing viewers to distinguish between different dimensions without confusion. The use of these lines aligns well with the conventions of technical drawing, ensuring that anyone referencing the installation drawings can easily understand the specified dimensions.

Other types of lines, while important in their own contexts, serve different purposes. Center lines indicate the axes of symmetry, dimension lines provide the measurements themselves, and leader lines are typically used to connect annotations or notes to specific features on the drawing. Thus, while all these line types have their significance, extension lines are essential for clear and effective dimensioning on installation drawings.