Method of measurement of building and civil engineering works, Part 22: Materials

IS 1200 Part 22 (1982) – Introduction and Adoption: Key Points

This part covers methods of measurement of materials used in civil engineering works.

Key Specifications from Clause 1.5 and Table 1:

Measurement Notes:

• Diameter for bamboos is measured at 1.5 m from the thick end.
• For bricks/stone aggregates ≥ 40 mm, volume is measured in m³ after 7.5% deduction from stack measurements.
• For aggregates < 40 mm, measurement is gross stack volume without deduction.

Summary Diagram: Material Measurement Units

graph LR
A[Materials] --> B[Bamboos]
A --> C[Scantlings/Planks]
A --> D[Tiles]
A --> E[Water Proofing]
A --> F[Wire & Wire Rope]

B --> B1[Enumerated & described]
B --> B2[Diameter @1.5m]

C --> C1[Volume in m³]
C1 --> C2[Size & Type]

D --> D1[Area in m² or Enumerated]
D1 --> D2[Size & Type]

E --> E1[Kg or Litres]

F --> F1[Kg or Running Metres]

This part of IS 1200 standardizes material measurement units and methods to ensure uniformity in estimation and billing.

Importance of Measurement in Civil Engineering (IS 1200 Part 22)

Measurement is crucial throughout a civil engineering project—from initial estimates to final payments. Key points:

• Uniformity: Different agencies and government departments use varied measurement methods, causing inconsistencies.
• Unification: IS 1200 aims to standardize measurement methods technically to avoid ambiguities and enable smooth contractor operations.
• Scope: Applies to building and civil engineering works, ensuring clarity in quantities and specifications.

Key Specifications:

• Measurements must be clear, unambiguous, and consistent.
• They form the basis for cost estimation, progress tracking, and payment settlement.
• Standard units and methods as per IS 1200 should be adopted for all items.

Typical Measurement Units & Methods (as per IS 1200):

Formula example for Earthwork volume:

[ V = \frac{A_1 + A_2}{2} \times h ]

• (A_1, A_2) = areas of two consecutive cross-sections (m²)
• (h) = distance between sections (m)

flowchart LR
    A[Project Planning] --> B[Measurement of Quantities]
    B --> C[Cost Estimation]
    C --> D[Execution & Monitoring]
    D --> E[Final Measurement]
    E --> F[Payment Settlement]

Summary: IS 1200 Part 22 emphasizes standardized measurement to ensure transparency, uniformity, and efficient project management in civil engineering works.

IS 1200 Part 22: Description of Item & Measurement Specifications

1. Description of Item (Clause 2.1)

• Each item description shall include:
  • Conveyance and delivery
  • Handling and unloading
  • Storing, etc.
• Unless otherwise stated, these aspects are integral to the item description.

2. Method of Measurement (Clause 3.1 & 7.5, Table 1)

3. Key Notes

• For stacked materials, deductions (e.g., 7.5% for aggregates ≥ 40 mm, 15% for soling stones) are made to account for voids.
• Sizes, types, grades, and classes must always be specified.
• Measurements include gross or net quantities depending on material type.

Summary Diagram of Measurement Process

flowchart TD

IS 1200 Part 22: Limits of Measurement

Key Specifications (Clause 2.2)

• Length/Dimensions: Measured net in decimal system, rounded to nearest 0.01 m.
• Area: Rounded to nearest 0.01 m².
• Volume: Rounded to nearest 0.01 m³.
• Weight: Rounded to nearest 1 kg.

Rounding Off (Refer Clause 0.4)

• Final measurement values must be rounded as per IS 2-1960 (Rules for rounding off numerical values).

Purpose & Importance (Clause 0.2)

• Uniform measurement methods reduce ambiguity and facilitate smooth contract execution and payment settlements.
• Standardization helps contractors work across different departments efficiently.

Summary Table

Note on Rounding (IS 2-1960)

• If the digit to be dropped is less than 5, the preceding digit remains unchanged.
• If 5 or more, the preceding digit is increased by one.

flowchart LR
    A[Measurement] --> B[Take exact value]
    B --> C{Round off?}
    C -->|Yes| D[Apply IS 2-1960 rules]
    C -->|No| E[Use exact value]
    D --> F[Report final value]
    E --> F

This ensures consistent, precise, and standardized reporting of civil engineering measurements.

IS 1200 Part 22: Bills of Quantities - Key Specifications & Measurement Methods

Clause 2.3:

• Bills of Quantities must fully describe materials including type, size, grade, and quantity.

Table 1: Method of Measurement of Materials (Summary)

Important Notes:

• Deductions:

  • 7.5% deduction for bricks/stone ≥40 mm from stack volume.
  • 15% deduction for soling stone, boulders, rubble from gross stack.

• Enumerated items are counted individually and described by size/type.

• Weight measurements (kg, tonnes) for metals, cement, bitumen, etc.

Practical Use:

• Always specify size, type, grade, thickness, and length as applicable.
• Use stack measurements for bulk materials but apply deductions for voids.
• Enumerate fittings and accessories clearly for precise billing.

flowchart TD
    A[Bills of Quantities] --> B[Material Description]
    B --> C[Measurement Unit]
    C --> D

IS 1200 Part 22 - Method of Measurement of Materials: Key Points

Measurement Methods (Table 1 Summary)

Important Notes:

• Stack measurement deductions:
  • 7.5% for brick/stone aggregates ≥40 mm
  • 15% for soling stones, boulders, rubble
• Enumerated means counting individual units and describing size/type.
• For volumetric measurements, gross stack volume is measured, then deductions applied to account for voids.
• Weight measurements require specifying size/type for clarity.

Example Formula for Deduction from Stack Volume:

[ \text{Net Volume} = \text{Gross Stack Volume} \times (1 - \text{Deduction %}) ]

• For brick aggregates

IS 1200 Part 22 (1982) — Measurement of Various Types of Materials

Key Measurement Methods (Table 1 Summary):

Important Deduction Notes:

• Brick/Stone ≥ 40 mm: Deduct 7.5% from stack volume.
• Soling stone, boulders, rubble: Deduct 15% from gross stack volume.

Example: Measuring Brickwork ≥ 40 mm

[ \text{Net Volume} = \text{Gross Stack Volume} \times (1 - 0.075) ]

Summary Diagram (Material → Measurement Unit)

graph TD
  A[Materials] --> B[Aggregates]
  A -->

IS 1200 Part 22 - Measurement Methods for Specific Materials

Key Measurement Methods (Table 1 Summary)

Important Deductions:

• Brick/Stone ≥ 40 mm: Deduct 7.5% from stack volume to get net volume.
• Soling stone, boulders, rubble: Deduct 15% from gross stack volume.

Example Formula for Brick/Stone ≥ 40 mm:

[ \text{Net Volume} = \text{Gross Stack Volume} \times (1 - 0.075) = 0.925 \times \text{Gross Stack Volume} ]

Notes:

• Enumerated means counting individual units.
• Descriptions should include size, type, grade, and other relevant details.
• Measurement units vary by material type for accuracy and standardization.

flowchart LR
    A[Material Type] -->