Final answer:
A normal GB (gypsum board) wall should not measure more than 4 feet in width without additional support.
Step-by-step explanation:
A normal GB (gypsum board) wall should not measure more than 4 feet in width without additional support. This is because wider walls may require additional framing and bracing to maintain structural stability. However, it is important to consult local building codes and regulations as they may vary depending on the location.