In metal lath installation, what is the minimum end lap distance?

In metal lath installation, what is the minimum end lap distance?

• A. 1 foot
• B. 6 inches
• C. 2 feet
• D. 3 inches

Answer: (A)

The main idea is to provide a continuous, secure backing for the plaster by making sure two metal lath sheets overlap enough to hold together under plaster weight and movement. The minimum end lap distance for metal lath is 1 foot. This amount of overlap gives enough area for the plaster to key into and for fasteners along the lap to hold the joint firmly, reducing the risk of the seam opening or cracking as the plaster cures and the structure moves. It’s also common practice to stagger end joints in successive courses so a long vertical seam isn’t formed, which further helps prevent cracking and distributes stresses more evenly.

The main idea is to provide a continuous, secure backing for the plaster by making sure two metal lath sheets overlap enough to hold together under plaster weight and movement. The minimum end lap distance for metal lath is 1 foot. This amount of overlap gives enough area for the plaster to key into and for fasteners along the lap to hold the joint firmly, reducing the risk of the seam opening or cracking as the plaster cures and the structure moves. It’s also common practice to stagger end joints in successive courses so a long vertical seam isn’t formed, which further helps prevent cracking and distributes stresses more evenly.