Method of measurement of building and civil engineering works, Part 18: demolition and dismantling

IS 1200 Part 18: Scope - Key Points & Specifications

• Scope Expansion: Initially for building works, now covers civil engineering works including industrial and river valley projects (Clause 0.4).
• Measurement Units:
  • Soling and sub-bases: Measured in cubic metres separately by material type (Clause 18.4).
  • Steel and iron work: Measured in kilograms, weight computed from standard tables or actual weight (Clause 11.1).
• Rounding Off: Final measurement results rounded per IS 2-1960, maintaining significant figures as per the specified values (Clause 0.5).

Summary Table for Measurement Units

This standard provides a unified method for measurement across building and civil engineering projects ensuring consistency and clarity.

flowchart TD
    A[IS 1200 Part 18 Scope] --> B[Building Works]
    A --> C[Civil Engineering Works]
    C --> D[Industrial Projects]
    C --> E[River Valley Projects]
    B & C --> F[Measurement Units]
    F --> G[Soling & Sub-bases: m³]
    F --> H[Steel & Iron: kg]
    F --> I[Rounding per IS 2-1960]

IS 1200 Part 18 (1974) – General Measurement Rules: Key Points

• Measurement Basis:
  All work is measured net in the decimal system as fixed in its final position (Clause 2.3.2).

• Dimension Accuracy:
  Dimensions are recorded to the nearest 0.01 m (Clause 2.3.2.1).

• Rounding Rules:
  Numerical values are rounded off according to prescribed rules (refer to IS 1200 Part 18 for specifics).

• Purpose:
  Standardizing measurement methods eliminates ambiguity, enabling uniformity across agencies and departments, aiding smooth planning, execution, and payment settlement.

Typical Measurement Guidelines Summary

flowchart TD
    A[Start Measurement] --> B[Measure Dimension]
    B --> C{Round to nearest 0.01 m?}
    C -- Yes --> D[Record Net Dimension]
    C -- No --> B
    D --> E[Use Decimal System]
    E --> F[Finalize Measurement]

Note: Refer to IS 1200 Part 18 for detailed rounding rules and measurement methods for specific items.

IS 1200 Part 18: Measurement of Walls, Piers, Columns, and Foundations

Key Specifications:

• Measurement Unit: All walls, piers, columns, footings, and foundations (brick, stone, concrete) are measured in cubic metres (m³).
• Inclusions: Copings, corbels, cornices, and projections are included in wall measurements (Clause 3.1).
• Reinforced Concrete: Measure in cubic metres including footing/foundation; specify if reinforcement cutting is required (Clause 4.1).
• Roofs and Floors: Concrete/brick roofs, floors, beams, cantilevers included in cubic metres (Clause 7.1).
• Floors & Pavings:
  • Non-concrete pavings in cubic metres with fixing mode described.
  • Concrete pavings in square metres (m²) with thickness stated (Clause 8.1).

Typical Measurement Formula:

[ \text{Volume (m}^3) = \text{Length (m)} \times \text{Breadth (m)} \times \text{Thickness/Height (m)} ]

Example Table: Measurement Units Summary

flowchart TD
    A[Walls, Piers, Columns] --> B[Measured in m³]
    B --> C{Include projections?}
    C -->|Yes| D[Include copings, corbels, cornices]
    A --> E[Footings & Foundations]
    E --> B
    F[Reinforced Concrete] --> G[Measured in m³]
    G --> H{Reinforcement cutting?}
    H -->|Yes| I[State explicitly]
    J[Concrete Pavings] --> K[

Measurement of Reinforced Concrete Structures (IS 1200 Part 18)

Key Specifications:

• Unit of Measurement:
  • Reinforced concrete structures, including footings and foundations: cubic metres (m³) (Clause 4.1, 7.1)
  • Reinforcement steel: kilograms (kg), especially if cut or salvaged (Clause 4.1, 4.2)
  • Concrete paving: measured as per Clause 8.1, separately if reinforced (Clause 18.3)

Important Points:

• Include beams, cantilevers, and similar supports in the concrete volume.
• Reinforcement cutting or cleaning must be separately stated and measured.
• Concrete paving reinforced with bars/fabric must be measured separately.

Typical Measurement Formula:

[ \text{Volume of RCC} = \text{Length} \times \text{Breadth} \times \text{Depth (thickness)} ]

Reinforcement Measurement:

• Weight of steel bars = Sum of lengths × cross-sectional area × density (density of steel ≈ 7850 kg/m³)

Summary Table:

flowchart TD
    A[Reinforced Concrete Structure] --> B[Measure Volume in m³]
    A --> C[Measure Reinforcement in kg]
    B --> D[Include beams, cantilevers]
    C --> E[Include cutting, cleaning separately]
    F[Concrete Paving] --> G[Measure Volume]
    F --> H[If reinforced, measure steel separately]

This ensures clear and standardized measurement for RCC works per IS 1200 Part 18.

IS 1200 Part 18: Measurement of Lead Sheets

Key Points:

• Measurement Unit:
  Lead sheets used in roofs (including hips, valleys, flashings, linings to gutters) are measured by weight in kilograms (Clause 5.3).

• Inclusion:
  All associated components like flashings and valleys are included in the total weight.

• Steel and Iron Work:
  Measured in kilograms; weight calculated from standard weight tables unless actual weight is known (Clause 11.1).

• Rounding Off:
  Final measured/calculated values must be rounded off as per IS 2:1960, maintaining significant figures consistent with the standard (Clause 0.5).

Typical Formula for Weight of Lead Sheet:

[ \text{Weight (kg)} = \text{Area (m}^2) \times \text{Thickness (m)} \times \text{Density of Lead (kg/m}^3) ]

• Density of Lead: ~11,340 kg/m³
• Thickness usually in mm (convert to meters for calculation).

Example Table: Weight of Lead Sheet per m²

flowchart LR
A[Measure Area of Lead Sheet] --> B[Determine Thickness]
B --> C[Calculate Weight = Area × Thickness × Density]
C --> D[Include Hips, Valleys, Flashings]
D --> E[Round off as per IS 2:1960]

Summary: Measure lead sheets by weight (kg), include all roofing components, use density 11,340 kg/m³ for calculations, and round off results per IS 2:1960.

IS 1200 Part 18: Measurement of Concrete and Brick Roofs and Floors

Key Specifications:

• Measurement Unit: Concrete and brick roofs/floors are measured in cubic metres (m³).
• Inclusions: Beams, cantilevers, supporting joists, and other similar supports are included in the same item and measured in cubic metres or kilograms (for reinforcement).
• Reinforced Structures: Reinforced concrete/brick roofs, walls, footings, and foundations are measured in cubic metres. If reinforcement cutting is involved, it must be stated separately.

Important Clauses:

Measurement Formula:

[ \text{Volume (m}^3) = \text{Length (m)} \times \text{Width (m)} \times \text{Thickness (m)} ]

Notes:

• Include all projections (copings, corbels, cornices) in wall volume.
• For reinforced concrete, specify reinforcement separately if cut or altered.

flowchart LR
    A[Concrete/Brick Roof or Floor] --> B[Measure Length, Width, Thickness]
    B --> C[Calculate Volume in m³]
    C --> D[Include Beams, Cantilevers, Supports]
    D --> E[Note Reinforcement if Cut]

This ensures consistent and comprehensive measurement per IS 1200 Part 18.

IS 1200 Part 18: Floors and Pavings - Key Points

• Measurement Units:

  • Concrete & brick roofs/floors: cubic metres (m³) including beams, cantilevers, supports (Clause 7.1).
  • Floors & pavings (except concrete pavings): cubic metres (m³) with mode of fixing described (Clause 8.1).
  • Concrete pavings: square metres (m²) with thickness stated (Clause 8.1).

• Concrete Pavings:

  • Measured in m² × thickness (m).
  • Reinforcement (bars/fabric) measured and stated separately (Clause 18.3).

Typical Measurement Formula for Concrete Paving Volume

[ \text{Volume (m}^3) = \text{Area (m}^2) \times \text{Thickness (m)} ]

Summary Table:

flowchart LR
    A[Floors and Pavings] --> B[Concrete/Brick Floors & Roofs (m³)]
    A --> C[Non-Concrete Floors & Pavings (m³)]
    A --> D[Concrete Pavings (m² × thickness)]
    D --> E[Reinforcement Measured Separately]

This ensures clear and consistent measurement for estimation and billing per IS 1200 Part 18.

IS 1200 Part 18: Partitions, Trellis Work, etc. – Key Points

• Measurement Units:

  • Partitions, trellis work (Jaffari), expanded metal, thin concrete/terra-cotta slabs: measured in square metres (m²) with thickness stated (Clause 9.1).
  • Floors/pavings (except concrete): measured in cubic metres (m³) with mode of fixing described (Clause 8.1).
  • Concrete pavings: measured in square metres (m²) stating thickness (Clause 8.1).
  • Boarding including wooden chajjas/sunshades: measured in square metres (m²) with thickness (Clause 10.3).

• Specifications:

  • Include framework if any, for partitions and trellis work.
  • Doors/windows/ventilators (wood or steel) removal during dismantling should be enumerated separately if opening > 3 m² (Clause 12.1).
  • Removal of chowkhats, architraves, holdfasts included in the item.

Typical Measurement Formula for Partitions:

[ \text{Area} = \text{Length} \times \text{Height} \quad (\text{m}^2) ]

Thickness is noted separately as per item specification.

Summary Table:

flowchart LR
    A[Partitions/Trellis Work] --> B[Measure Area (m²)]
    B --> C[State Thickness]
    A --> D[Include Framework if any]
    E[Doors/Windows] --> F{Opening > 3 m²?}
    F -- Yes --> G[Measure separately]
    F -- No --> H[Include in dismantling]

This concise guide aligns with IS

IS 1200 Part 18 (1974) - Measurement of Woodwork: Key Points

• Measurement Units:

  • Wood sections under 40 cm²: measured in running metres (linear measurement).
  • Wood sections 40 cm² and above: measured in cubic metres (volume).

• Supporting Members (Clause 5.4):

  • Rafters, purlins, beams, joists, trusses (wood): measured in cubic metres.
  • Steel/iron sections: measured in kilograms.
  • If span > 10 m, mention explicitly.

• Measurement Method (Clause 2.3.2):

  • All measurements are net (actual size fixed in place).
  • Use decimal system for calculations.

• Floors and Pavings (Clause 8.1):

  • Floors/pavings (except concrete): measured in cubic metres.
  • Concrete pavings: measured in square metres with thickness specified.

Summary Table for Woodwork Measurement

Formula for Volume (Cubic Metres) of Woodwork

[ \text{Volume} = \text{Cross-sectional Area} \times \text{Length} ]

• Cross-sectional area in m²
• Length in m

Notes:

• Always measure net size after fixing.
• Mention mode of fixing for floors/pavings.
• For spans >10 m in supporting members, state explicitly.

flowchart TD
    A[Wood Section Size] -->|< 40 cm²| B[Measure in Running Metres]
    A -->|≥ 40 cm²| C[Measure in Cubic Metres]
    D[Supporting Members] --> E[Measure in Cubic Metres]
    F[Steel/Iron Sections] --> G[Measure in Kilograms]

This concise guide aligns with IS 120

IS 1200 Part 18: Measurement of Doors and Windows - Key Points

1. Measurement Scope (Clause 12.1)

• Doors, windows, ventilators (wood/steel), whether removed or recessed, must be enumerated.
• Openings exceeding 3 m² are measured separately.
• Removal of chowkhats, architraves, holdfasts, and attachments included in measurement.

2. Dimensions (Clause 2.3.2.1)

• Measure dimensions to the nearest 0.01 m.

3. Measurement Units (Clause 10.2)

• Woodwork < 40 cm² cross-section: measured in running metres.
• Woodwork ≥ 40 cm² cross-section: measured in cubic metres.

4. Weight Considerations (Clause 11.4)

• For framed steel gates, add weight of covering/filling (iron sheets, expanded metal) if not removed separately.

Typical Measurement Formula for Door/Window Area:

[ \text{Area} = \text{Height} \times \text{Width} \quad (m^2) ]

Summary Table:

flowchart LR
    A[Measure Opening] --> B{Area > 3 m²?}
    B -- Yes --> C[Measure separately in m²]
    B -- No --> D[Include in wall measurement]
    C --> E[Include chowkhats, architraves, holdfasts]
    D --> E
    E --> F[Record dimensions to nearest 0.01 m]

This ensures standardized, accurate measurement for doors and windows per IS 1200 Part 18.

IS 1200 Part 18: Measurement of Posts or Struts

• Clause 13.1: Posts or struts (wood, steel, or RCC), including embedded portions, are measured in running metres (linear length).

• Measurement Notes:

  • Include embedded length fully.
  • Applicable for any cross-section shape.
  • For wood supporting members (rafters, beams, etc.), measure in cubic metres (volume).
  • For steel/iron sections, measure in kilograms (weight).
  • If span > 10 m, mention explicitly.

Key Specifications:

Formula for volume of wooden posts:

[ \text{Volume} = \text{Cross-sectional Area} \times \text{Length (m)} ]

Weight for steel posts:

[ \text{Weight (kg)} = \text{Length (m)} \times \text{Sectional Weight (kg/m)} ]

flowchart TD
    A[Posts or Struts] --> B{Material Type}
    B -->|Wood| C[Measure in Running Metres & Cubic Metres]
    B -->|Steel| D[Measure in Running Metres & Kilograms]
    B -->|RCC| E[Measure in Running Metres]

This ensures uniformity in measurement for billing and record-keeping per IS 1200 Part 18.

IS 1200 Part 18: Fencing Wire Mesh Measurement & Specifications

Key Points from Clauses:

• Clause 14.1:

  • Fencing wire mesh (any type) with framework is measured in square metres (m²).
  • If mesh is supplied in rolls without framework, it must be stated separately.

• Clause 13.1:

  • Posts or struts (wood, steel, RCC) measured in running metres (m), including embedded portions.

• Clause 11.4 (Steel gates):

  • Weight of covering materials (iron sheets, expanded metal) added to main article weight unless separately ordered.

• Clause 9.1 (Partitions/light walls):

  • Measured in square metres with thickness stated.

Typical Measurement Summary for Fencing Wire Mesh:

Additional Engineering Notes:

• Wire mesh area (m²) = Length (m) × Height (m)
• Posts embedment typically 0.6 to 0.9 m depending on soil conditions.
• Frame weight and mesh gauge depend on wire diameter and mesh size (e.g., 12 gauge, 50 mm × 50 mm openings).

flowchart LR
    A[Fencing Wire Mesh] --> B[With Frame]
    A --> C[In Rolls]
    B --> D[Measure in m²]
    C --> E[Measure in m² separately]
    F[Posts/Struts] --> G[Measure in running metres]
    G --> H[Include embedded length]

Summary: Measure fencing wire mesh including framework in square metres; posts/struts in running metres. Specify if mesh is rolled separately. Include weights of coverings if applicable.

IS 1200 Part 18 (1974) – Measurement of Serviceable Glass Removal

Key Specifications:

• Clause 15.1:

  • Measurement is by area (m²) for removing serviceable glass (any thickness, weight, size) from old sashes, skylights, etc.
  • Includes raking out old putty.

• Clause 2.9:

  • Separate measurement for lead removal:
    • Serviceable material separated, stacked within 100 m, debris disposed.
    • Removal beyond 100 m measured separately (see 2.9.1).
  • Distance measured over shortest practicable route.

• Clause 4.2:

  • Reinforcement steel separated, scraped, cleaned measured by weight (kg) of salvaged steel.

Measurement Summary:

Practical Notes:

• Measure glass removal area from old frames accurately.
• Lead and steel removal require separate measurement and handling.
• Always use shortest practical route for debris removal distance.

flowchart LR
    A[Serviceable Glass Removal] -->|Measured in m²| B[Area of Glass Removed]
    A --> C[Old Putty Removal]
    D[Lead Removal] -->|Separate measurement| E[Within 100 m stacking]
    D --> F[Beyond 100 m removal]
    G[Reinforcement Steel] -->|Measured in kg| H[Scraped & Cleaned Steel]

This ensures clarity in billing and work quantification per IS 1200 Part 18.

IS 1200 Part 18 (1974) – Measurement of Pipelines and Appurtenant Items

Key Specifications:

• Measurement Basis:

  • Pipelines (water, sewer, oil, gas) are measured in running metres.
  • Measurement is along the centerline of pipes and fittings (Clause 16.1).
  • Include joints, clamps, specials in length measurement.

• Pipe Description:

  • Pipes are described by their internal diameter and length.

• Irregular/Circular Plans:

  • Measured as equivalent rectangular or square areas (Clause 15.2).

• Appurtenant Items:

  • Items like ventilating shafts, gulley traps, flushing cisterns are enumerated separately (Clause 16.6).

Measurement Formula:

[ \text{Length of pipeline} = \sum \text{(centerline length of each pipe + fittings)} ]

Typical Table for Pipe Measurement:

flowchart LR
    A[Start: Pipeline Measurement] --> B[Identify pipe internal diameter]
    B --> C[Measure length along centerline]
    C --> D[Include joints and fittings length]
    D --> E[Sum total running metres]
    E --> F[Enumerate appurtenant items separately]
    F --> G[Prepare measurement sheet]

Summary: Measure pipelines by internal diameter and length along centerline, include joints/fittings, and enumerate appurtenant items separately as per IS 1200 Part 18.

IS 1200 Part 18: Measurement of Road Work - Key Points

• Clause 18.1: Different types of road surfaces (e.g., bituminous, concrete) are measured separately.

• Clause 18.2: Road paving is measured in square metres (m²).

• Clause 18.4: Soling and sub-bases are measured in cubic metres (m³), separately for each material type.

Measurement Units Summary

Volume Calculation for Soling/Sub-base

[ \text{Volume (m}^3) = \text{Length (m)} \times \text{Width (m)} \times \text{Thickness (m)} ]

• Measure each type of material separately.
• Thickness is as per design specifications.

Important Notes

• Uniform measurement methods reduce ambiguity.
• Measurements are critical from estimation to final payment.
• Follow specifications strictly to maintain consistency.

flowchart TD
    A[Start: Road Work Measurement] --> B{Type of Work?}
    B -->|Paving| C[Measure Area in m²]
    B -->|Soling/Sub-base| D[Measure Volume in m³]
    C --> E[Record separately by surface type]
    D --> F[Record separately by material type]
    E --> G[Use for estimation & payment]
    F --> G

For detailed specifications, refer to IS 1200 Part 18 clauses 18.1, 18.2, and 18.4.