In multi-wythe masonry walls, the maximum distance between headers is 24 inches.

• A. 18 inches
• B. 30 inches
• C. 36 inches
• D. 24 inches

Answer: (D)

Headers in masonry work to transfer loads around openings and keep the wall acting as a unit. In a multi-wythe wall, placing headers no farther apart than 24 inches ensures there’s always a solid support above each opening and maintains a reliable load path to the sides. If headers were spaced farther apart, the masonry above the opening would span a larger unsupported area, increasing bending, cracking, or failure risk. Spacing them at 24 inches provides the needed strength without being unnecessarily tight or costly.