AutoCAD default hatch pattern naming Is “ANSI 131” the default AutoCAD hatch pattern used for general section lining?

Introduction / Context:
AutoCAD provides a library of hatch patterns. The widely used default for general section lining is a simple diagonal line pattern (commonly referred to as ANSI31-style), not “ANSI 131.” Knowing the correct default avoids confusion when discussing templates and standards with colleagues.

Given Data / Assumptions:

• Users rely on default patterns for speed and consistency.
• The general-purpose section pattern is diagonal, evenly spaced lines.
• Pattern naming conventions can vary between versions or localized installations, but the “31” diagonal is the standard generic look.

Concept / Approach:
The default hatch for generic sections is the diagonal line pattern commonly labeled ANSI31. Other patterns represent specific materials or graphical textures. Misnaming the default as “ANSI 131” is an error that can cause template mismatches or miscommunication in CAD standards discussions.

Step-by-Step Solution:

Verification / Alternative check:
Examine your organization’s CAD standards manual; it likely specifies ANSI31-style as the default generic section hatch unless a material-specific convention overrides it.

Why Other Options Are Wrong:
“Correct (ANSI 131…)” misstates the common pattern name. Dependencies on plot style or limiting to specific templates do not change the conventional identifier for the generic hatch.

Common Pitfalls:
Selecting a pattern too dense for the plot scale, mixing multiple generic patterns within the same component, or mislabeling material-specific hatches as generic.

Final Answer:
Incorrect (the common default is the ANSI31-style diagonal pattern)