Post and beam structural system uses which elements to form the primary frame?

Post and beam structural system uses which elements to form the primary frame?

• A. Vertical posts and horizontal beams form a frame
• B. Load-bearing masonry walls carry all loads
• C. Arches and vaults carry loads
• D. Steel skeleton with infill panels

Answer: (A)

Post and beam systems rely on a skeleton of members—the vertical posts and horizontal beams—that work together to form the building’s frame. The posts carry vertical loads down to the foundation, while the beams span between posts to support floors and roofs. Because the loads are carried by the frame, openings can be larger and interior spaces can be more flexible, with non-structural infill walls filling the bays rather than carrying weight. This contrasts with load-bearing masonry, where the walls themselves carry the loads; arches and vaults, which transfer loads through curved forms; and a steel skeleton with infill, where a steel frame carries the loads and the infill panels are typically non-structural.

Post and beam systems rely on a skeleton of members—the vertical posts and horizontal beams—that work together to form the building’s frame. The posts carry vertical loads down to the foundation, while the beams span between posts to support floors and roofs. Because the loads are carried by the frame, openings can be larger and interior spaces can be more flexible, with non-structural infill walls filling the bays rather than carrying weight. This contrasts with load-bearing masonry, where the walls themselves carry the loads; arches and vaults, which transfer loads through curved forms; and a steel skeleton with infill, where a steel frame carries the loads and the infill panels are typically non-structural.