When constructing between two corner leads, how should a mason's line be used?

When constructing between two corner leads, how should a mason's line be used?

• A. From top to bottom for the course
• B. Stretch a mason's line from corner to corner at the proper height for each course
• C. Run a line across diagonally
• D. Not used for course height

Answer: (B)

Using a mason’s line as a horizontal reference between two corner leads is how you keep the wall straight and level across its entire length. When you stretch the line from corner to corner at the exact height of the next course, it becomes a visual guide for every brick or block you place, ensuring each unit sits on the same plane. As you complete a course, you re-tension the line to the height of the following course so the line always marks the correct elevation for the next row. This method helps you detect and correct any misalignment or height errors early, keeping the wall true to both line and level. Stretching a line top-to-bottom would not provide a horizontal height reference for the course. Running a line diagonally doesn’t give a consistent height guide across the length of the wall. Not using the line for course height would remove the primary way to transfer elevation between the corners.

Using a mason’s line as a horizontal reference between two corner leads is how you keep the wall straight and level across its entire length. When you stretch the line from corner to corner at the exact height of the next course, it becomes a visual guide for every brick or block you place, ensuring each unit sits on the same plane. As you complete a course, you re-tension the line to the height of the following course so the line always marks the correct elevation for the next row. This method helps you detect and correct any misalignment or height errors early, keeping the wall true to both line and level.

Stretching a line top-to-bottom would not provide a horizontal height reference for the course. Running a line diagonally doesn’t give a consistent height guide across the length of the wall. Not using the line for course height would remove the primary way to transfer elevation between the corners.