Final answer:
For 1/2" gypsum wallboard on ceilings, the typical maximum support spacing is 24 inches on center for perpendicular installation to the framing members and 16 inches on center for parallel installation, adhering to the manufacturer's and building codes' specifications.
Step-by-step explanation:
The question at hand relates to the maximum support spacing for 1/2" gypsum wallboard on a ceiling. It's essential to adhere to the manufacturer's recommendations and building codes when installing gypsum wallboard. Generally, for 1/2" gypsum wallboard, the maximum spacing for ceiling supports is typically 24 inches on center when the long edges of the wallboard are perpendicular to the framing members. If the long edges are parallel to the framing members, the maximum support spacing decreases to 16 inches on center. It's important to note that these values can vary depending on specific building code requirements and the manufacturer's specifications.