Measurement practice — stone work items measured in square metre: In which of the following cases is stone work measured in square metre (area) rather than cubic metre (volume)?

Introduction / Context:
Correct units are essential for consistent measurement and payment in BOQs. Masonry items may be measured by volume or area depending on whether they form a mass (thickness appreciable) or a facing/surface treatment (thickness relatively small and standardized).

Given Data / Assumptions:

• Standard IS/CPWD-style measurement rules.
• Stone masonry of walls vs. stone facings and dressed slabs for chajjas.

Concept / Approach:

Mass masonry (walls, columns) is measured in cubic metre. Surface linings, veneers, facings, and dressed slab applications are measured in square metre. Therefore, wall facing and dressed stones laid in chajjas fall under area measurement, while volumetric items remain in cubic metre.

Step-by-Step Solution:

Verification / Alternative check:

CPWD and standard textbooks specify veneer/facing in sqm, structural masonry in cum, confirming the selection.

Why Other Options Are Wrong:

• (b) and (c) represent mass elements; they are measured in cubic metre.
• Options listing any volumetric items are inconsistent with area measurement practice.

Common Pitfalls:

• Using cubic metre for thin facings, complicating rate analysis and payments.
• Ignoring different thicknesses of facing that may have separate item codes.

Final Answer:

(a) and (d).