Gypsum wallboard panels are typically how wide and what lengths are commonly available?

Gypsum wallboard panels, commonly known as drywall, are standard in the construction industry and are typically manufactured to be 4 feet wide. This width allows for easy handling and installation, making it compatible with common stud spacing in wall framing, which usually occurs at 16 or 24 inches on center.

Lengths for gypsum wallboard panels can vary, but the most common lengths available are typically 8 feet, 10 feet, 12 feet, and sometimes up to 14 feet. The answer provided indicates lengths of 12 and 14 feet, which aligns with the broader offerings in the market. The availability of 12-foot and 14-foot lengths allows for greater efficiency in covering large wall spaces without the need for excessive seams, thus reducing finishing work.

This choice correctly reflects the standard characteristics of gypsum wallboard, reinforcing its prevalence in building practices. The other options suggest dimensions that aren't commonly associated with manufactured gypsum wallboard panels.