Gypsum lath with one hole at 3/4 in diameter for each 16 square inches is called?

Gypsum lath with one hole at 3/4 in diameter for each 16 square inches is called?

• A. Perforated
• B. Solid
• C. Expanded
• D. Mesh

Answer: (A)

Perforated gypsum lath is used to give plaster a mechanical key to grip onto. The pattern described—one hole, 3/4 inch in diameter, for every 16 square inches—defines a sheet with intentional holes, not a solid surface. That combination of holes in a gypsum sheet is exactly what perforated lath is. If the lath were solid, there’d be no holes. If it were expanded lath, it would be a sheet with slits that expand into a web rather than round holes. If it were mesh, you’d be dealing with a wire or metal mesh reinforcement rather than perforations in gypsum.

Perforated gypsum lath is used to give plaster a mechanical key to grip onto. The pattern described—one hole, 3/4 inch in diameter, for every 16 square inches—defines a sheet with intentional holes, not a solid surface. That combination of holes in a gypsum sheet is exactly what perforated lath is. If the lath were solid, there’d be no holes. If it were expanded lath, it would be a sheet with slits that expand into a web rather than round holes. If it were mesh, you’d be dealing with a wire or metal mesh reinforcement rather than perforations in gypsum.