In a brickwork Bill of Quantities (BOQ), which of the following items is typically measured in square metres (sq.m) rather than cubic metres (cu.m) or running metres?

Introduction / Context:
Different brickwork and associated items use different billing units. Cubic metres are used for volumetric masonry, running metres for linear features, and square metres for superficial finishes or coverings. Selecting the correct unit maintains consistency across estimates and payments.

Given Data / Assumptions:

• Reinforced brickwork and brick arches are volumetric masonry items.
• Brick edging is a linear feature along edges.
• Broken glass coping forms a superficial protective layer along the top of a wall.

Concept / Approach:
Broken glass coping is spread over an area on top of walls for anti-climb security or finish; hence it is measured in sq.m. Reinforced brickwork and arches involve thickness and volume, thus measured in cu.m. Brick edging is measured by length (running metres) because it is essentially linear with a standard cross-section.

Step-by-Step Solution:
Identify the nature of each item: superficial, volumetric, or linear.Map unit: superficial → sq.m; volumetric → cu.m; linear → m.Apply: Broken glass coping → sq.m; reinforced brickwork → cu.m; brick edging → m; brickwork in arches → cu.m.Therefore, the correct sq.m item is Broken glass coping.

Verification / Alternative check:
Schedules of Rates and standard measurement rules list coping or protective toppings by area, including materials and laying specifications.

Why Other Options Are Wrong:

• Reinforced brick work: measured by volume due to structural thickness.
• Brick edging: measured by running metre along its path.
• Brick work in arches: volumetric measurement applies.

Common Pitfalls:
Confusing surface treatments with masonry; assuming all “brick” items are volumetric.

Final Answer:
Broken glass coping (spread over the top of a wall)