Brickwork terminology: A brick laid on its side (9 cm × 9 cm face as the bed) with the frog in a vertical plane is called

Introduction / Context:
Accurate bricklaying terminology ensures correct execution and measurement. The way a brick is oriented determines the width of the wall and bond pattern. Standard modular brick dimensions are approximately 19 cm × 9 cm × 9 cm including mortar allowance.

Given Data / Assumptions:

• Brick is laid so that its 9 cm × 9 cm face serves as the bed (i.e., side orientation).
• The frog (indentation) is placed in a vertical plane.
• Conventional brick sizes and names are assumed.

Concept / Approach:
When a brick is laid with its narrow face (9 cm × 9 cm) as the bed, the orientation is called “brick on edge.” The frog being vertical is consistent with this orientation for certain bonds and facing requirements. “Brick on bed” refers to the larger 19 cm × 9 cm face down; “brick on end” stands the brick up; “brick held vertically” is a nonstandard description.

Step-by-Step Solution:
Identify side placement with 9 cm × 9 cm face down → characteristic of “on edge.”Confirm frog orientation: vertical plane when on edge → consistent practice.Map alternatives to standard definitions and rule them out.

Verification / Alternative check:
Brickwork manuals illustrate “on edge” for half-brick features and copings where a narrower wall thickness is desired.

Why Other Options Are Wrong:
Brick on end: Stands the 9 cm × 19 cm face as bed, not applicable here.Brick on bed: Uses the 19 cm × 9 cm face as bed.Brick held vertically: Not a standard term.Queen closer: A cut brick, not an orientation.

Common Pitfalls:
Confusing “on edge” with “on end”; disregarding frog orientation, which affects bond and finish.

Final Answer:
Brick on edge.