Method of measurement of building and civil engineering works: Part11 paving, floor finishes dado and skirting

Scope Summary - IS 1200 Part 11 (1977): Measurement of Concrete Work

• Clause 6.1: Particulars to be specified

  • Composition and mix of concrete.
  • Thickness of concrete (excluding keys, grooves, open joints).
  • Nature of base and any treatment applied.

• Clause 2.4: Dimension Measurement

  • Lengths measured to nearest 0.01 m.
  • Areas measured to nearest 0.01 m².
  • All measurements are net, as laid, using the decimal system.

• Clause 2.12: Curved/Conical/Spherical Work

  • Must be described separately with radius specified.

• Clause 2.3: Description of Items

  • Includes all operations: conveyance, delivery, handling, unloading, storing, fabrication, hoisting, finishing, setting, fitting, fixing, cutting waste, and incidental work.

Key Measurement Notes:

Practical Tip:

Always provide detailed item descriptions including mix, thickness, base treatment, and radius for curved elements to ensure clarity and accuracy in measurement and billing.

flowchart LR
    A[Concrete Work] --> B[Composition & Mix]
    A --> C[Thickness (excl. keys/grooves)]
    A --> D[Base & Treatment]
    A --> E[Dimensions (nearest 0.01 m)]
    A --> F[Area (nearest 0.01 m²)]
    A --> G[Curved Work with Radius]
    A --> H[Inclusive of handling, fixing, finishing]

This ensures comprehensive and standardized measurement per IS 1200 Part 11.

IS 1200 Part 11: General Principles of Measurement

Key Specifications:

• Dimension Measurement (Clause 2.4):

  • Length, breadth, height measured net, as laid.
  • Use decimal system.
  • Dimensions rounded to nearest 0.01 m.
  • Areas rounded to nearest 0.01 m².
  • Length and breadth measured before laying skirting, dado, or plaster.

• Description of Items (Clause 2.3):

  • Includes conveyance, delivery, handling, unloading, storing, fabrication, hoisting.
  • Labour for finishing, setting, fitting, fixing, cutting, waste, and incidental operations included.

• Measurement of Special Features (Clause 6.7):

  • Channels in beds measured in running meters as extra over bed.
  • Includes arrises, rounded edges, coves, ends, angles, intersections, outlets.

Rounding Off Rules (IS 2-1960):

• Measurement results rounded to maintain the same significant figures as specified values.

Summary Table for Measurement Units

Measurement Flowchart (Conceptual)

flowchart TD
    A[Start Measurement] --> B[Check Item Description]
    B --> C[Measure Dimensions Net, As Laid]
    C --> D{Dimension Type?}
    D -->|Length/Breadth/Height| E[Round to 0.01 m]
    D -->|Area| F[Calculate and Round to 0.01 m²]
    D -->|Channels/Edges| G[Measure Running Meters]
    E & F & G --> H[Include Labour, Handling, Finishing]
    H --> I[Apply Rounding Rules (IS 2-1960)]
    I --> J[Record Final Measurement]
    J --> K[End]

This ensures uniformity and accuracy in civil and building works measurement per IS

IS 1200 Part 11 (1977) – In Situ Finishes: Key Specifications

Classification & Measurement (Clause 3.1)

• Types: Granolithic, terrazzo, mosaic, etc.
• Details to specify:
  • Composition & mix
  • Thickness: Excludes keys, grooves, open joints
  • Number of coats
  • Surface treatment: e.g., steel trowelled, wood floated, polished
  • Base nature & treatment
  • Situation: Flooring, dado, skirting

Labour Measurement (Clause 2.12.1)

• Labour shall be measured and described separately for in situ finishes.

Particulars for Execution (Clause 6.1)

• Provide:
  • Composition & mix
  • Thickness (excluding keys/grooves/joints)
  • Base nature & treatment

Special Measurement Notes (Clause 4.16)

• Treads, risers, edges of landings: Measured separately (m²)
• Landings included in main flooring item

Typical Thickness & Mix Guidelines (General Practice)

Summary Diagram of In Situ Finish Layers

graph TD
  A[Base Concrete/Slab] --> B[Surface Treatment (e.g., curing)]
  B --> C[In Situ Finish Layer]
  C --> D[Surface Treatment (e.g., polishing)]

Note: Thickness excludes keys/grooves/open joints to ensure uniform measurement of the finish layer only. Always specify mix and surface treatment for clarity in execution and billing.

IS 1200 Part 11 (1977): Precast Units Key Points

Description & Specifications (Clauses 4.1, 6.1, 2.3)

• Kind of Unit: Specify type (precast concrete, terrazzo, brick, stone, etc.). For precast concrete, state mix design.
• Dimensions: Thickness and size of units excluding keys, grooves, or joints.
• Shape: Rectangular or other specified shapes.
• Surface Finish: Glazed, rubbed, polished, etc.
• Fixing Method: Bedding type (wood, screed, concrete, brickwork).
• Joint Treatment: Grouting, pointing, or finishing details.
• Base Nature: Material and any treatment.
• Usage Location: Flooring, dado, skirting, etc.
• Joint Layout: Arrangement and pattern.

Additional Notes

• Temporary moulds for precast units are included in measurement (Clause 1.2).
• Item description includes conveyance, handling, fabrication, finishing, fixing, waste, and incidental operations (Clause 2.3).

Typical Table for Precast Concrete Mix (Example)

Thickness Guidelines (Typical)

• Floor tiles: 20-40 mm
• Wall tiles: 10-25 mm
• Slabs/blocks: As per structural requirement, typically 50 mm and above

flowchart TD
    A[Precast Unit Specification] --> B[Kind of Unit]
    A --> C[Dimensions]
    A --> D[Surface Finish]
    A --> E[Fixing Method]
    A --> F[Joint Treatment]
    A --> G[Base Nature]
    A --> H[Usage Location]
    A --> I[Joint Layout]

This summary aligns with IS 1200 Part 11 requirements for precast units description and measurement.

IS 1200 Part 11: Cutting, Fitting and Special Work

Key Specifications & Enumeration Rules:

• Clause 4.7:
  Cutting/fitting around steel stanchions and similar elements must be described and enumerated separately.

• Clause 4.8 & 5.8:
  Cutting/fitting around pipes, tubes, bars, cables, conduits, etc. shall be described and enumerated distinctly.

• Clause 4.10:
  Cutting/fitting around grouped items like ducting brackets, newels, WC pedestals, vents, soot-doors must be enumerated in stages of 25 cm girth increments.

Enumeration & Measurement Guidelines

Practical Notes:

• Always describe the nature of cutting/fitting (e.g., circular hole, notch, groove).
• For grouped items, measure total girth/perimeter and break down into 25 cm increments.
• Enumerate each special work separately for accurate costing and clarity.

flowchart LR
    A[Cutting & Fitting Work] --> B[Pipes, Tubes, Bars, Cables]
    A --> C[Steel Stanchions]
    A --> D[Ducting Brackets, Newels, WC Pedestals, Vents, Soot-Doors]
    D --> E[Measure Girth in 25 cm stages]

This ensures clear, standardized measurement and billing for special cutting and fitting work as per IS 1200 Part 11.

IS 1200 Part 11: Bedding and Backings Key Points

1. Measurement Specifications:

• Clause 6.4: Bedding/backing laid in bays or panels must specify the size of bay or panel area.
• Clause 6.5: Bedding/backing in treads, risers, and landing edges measured separately in m²; landing work included in main item.
• Clause 6.6: Bedding/backing in skirtings and dados measured separately.

2. Cutting & Fitting (Clause 5.10):

• Cutting around fixtures (ducting brackets, WC pedestals, vents, etc.) enumerated by size in 25 cm girth stages.

Typical Bedding Thickness (General Practice):

Measurement Formula for Bedding Area:

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

flowchart TD
    A[Bedding and Backings] --> B[Bays/Panels]
    A --> C[Treads/Risers/Landing Edges]
    A --> D[Skirtings/Dados]
    B --> E[Specify size of bay/panel]
    C --> F[Measure separately in m²]
    D --> G[Measure separately]

Summary: Always specify the exact area or bay size for bedding/backing. Separate measurement for skirtings, dados, treads, risers, and landings ensures clarity and accurate billing.

Measurement of Moulded Nosings and Kerbs as per IS 1200 Part 11

• Moulded Nosings (Clause 3.8 & 1.6):

  • Measured in running metres.
  • Includes returned moulded ends, angles, edges, grooves, flutes.
  • Ends, angles, and intersections are enumerated separately.

• Kerbs (Clauses 4.14 & 3.10):

  • Measured in running metres describing the section and girth on face.
  • Includes rounded edges, coves, arrises.
  • Differentiate between raking kerbs and vertical kerbs.
  • Angles and intersections are enumerated separately.

Summary Table for Measurement

Key Points:

• Always describe the section and girth for kerbs.
• Enumerate angles, ends, and intersections separately.
• Measurements are linear (running metres), not by area or volume.

flowchart LR
    A[Moulded Nosings] --> B[Measured in running metres]
    B --> C[Includes returned ends, angles, edges]
    A --> D[Ends, angles enumerated separately]

    E[Kerbs] --> F[Measured in running metres]
    F --> G[Describe section & girth on face]
    F --> H[Includes rounded edges, coves, arrises]
    E --> I[Separate raking and vertical kerbs]
    E --> J[Angles and intersections enumerated separately]

This ensures accurate and consistent measurement for billing and quality control.

IS 1200 Part 11 - Measurement of Joints, Laps, and Seams

Key Points from Clauses:

• Clause 5.2:

  • Laps and seams are not measured separately.
  • Include lap length and seam type in the item description.

• Clause 5.6:

  • Cover strips over joints are measured in running metres.
  • Description must state size, and include ends, angles, intersections.

• Clause 2.8:

  • Expansion and dummy joints are measured separately in running metres.
  • Description must state depth, width, and filler type.

• Clause 4.11:

  • Dividing strips are measured separately in running metres.
  • Description includes size, thickness, ends, angles, intersections, and fixing method.

Summary Table for Measurement

Practical Notes:

• Always describe joints fully in the bill of quantities (BOQ).
• Use running metres for linear elements like cover strips and joints.
• No separate measurement for laps and seams; include them in the main item.

flowchart LR
    A[Joints & Seams] --> B[Laps & Seams (Included)]
    A --> C[Cover Strips (Measured)]
    A --> D[Expansion/Dummy Joints (Measured)]
    A --> E[Dividing Strips (Measured)]
    B --> F[Describe lap length & seam type]
    C --> G[Describe size, ends, angles]
    D --> H[Describe depth, width, filler]
    E --> I[Describe size, thickness, fixing]

This ensures clarity and uniformity in measurement as per IS 1200 Part

IS 1200 Part 11 - Measurement of Dividing Strips and Panels

Key Points from Clauses:

• Dividing strips are measured separately in running metres.
• Description must include:
  • Size and thickness
  • Details for ends, angles, intersections
  • Method of fixing or embedding
• Panels or bays between dividing strips are measured by area (m²).

Measurement Specifications:

Practical Formulae:

• Length of dividing strip (L): [ L = \sum \text{all linear edges including ends, angles, intersections} ]

• Area of panel (A): [ A = \text{Length} \times \text{Width} \quad \text{(between dividing strips)} ]

Notes:

• Dividing strips are fixed or embedded as per design; this affects description but not measurement.
• Bedding and backing for panels are measured by area corresponding to the panel size.

flowchart LR
    A[Dividing Strips] -->|Measured in| B(Running Metres)
    C[Panels/Bays] -->|Measured in| D(Square Metres)
    B --> E{Include}
    E --> F[Ends]
    E --> G[Angles]
    E --> H[Intersections]

Summary:
Measure dividing strips by length (m), describe size/thickness and fixing. Measure panels by area (m²) between strips. Include all geometric details for accuracy.

IS 1200 Part 11: Measurement of Curved and Patterned Work

Key Specifications & Measurement Rules

• Curved, Conical, Spherical Work (Clause 2.12):

  • Describe separately with radius stated.

• Raking & Curved Cutting (Clause 5.5):

  • Measured separately in running metres (length along curve).
  • If within a pattern, measure as per pattern rules (Clause 2.11).
  • Rounded external angles and coved internal angles measured separately in running metres, stating girth (perimeter length).

• Isolated Width Work (Clause 2.7.1):

  • Width ≤ 30 cm: measure in running metres (length).
  • Width > 30 cm: measure in square metres (area).

• Kerbs (Clause 3.10):

  • Measure in running metres stating girth on face.
  • Raking kerbs, vertical kerbs, arrises, rounded edges, coves described separately.
  • Angles and intersections enumerated separately.

Measurement Summary Table

Formula for Length of Curved Work (Arc Length)

[ L = r \times \theta ]

• (L) = Length of curve (running metres)
• (r) = Radius of curve (metres)
• (\theta) = Central angle in radians

flowchart LR
    A[Curved Work] --> B[Measure radius]
    A --> C[Calculate length = r × θ]
    D

IS 1200 Part 11: Labour and Ancillary Work - Key Points

• Labour Measurement (Clause 2.12.1): Labour must be described and measured separately from materials and other costs.

• In-Situ Finishes (Clause 2.3): Each item includes:

  • Conveyance, delivery, handling, unloading, storing
  • Fabrication, hoisting
  • Labour for finishing to shape and size
  • Setting, fitting, fixing in position
  • Straight cutting, waste allowance
  • Return of packings and incidental operations

• Cuttings (Clause 2.6): Include waste generated from cutting unless otherwise specified.

• Bills of Quantities (Clause 2.5): Must fully describe materials, workmanship, and accurately represent the work.

• Measurement of Finishes (Clause 4.16):

  • Treads, risers, edges of landings measured separately (in m²)
  • Work on landings included in main item

Typical Labour Cost Formula (General Guidance)

[ \text{Labour Cost} = \text{Labour Hours} \times \text{Labour Rate per Hour} ]

• Labour hours include all tasks listed in Clause 2.3.
• Waste and cutting allowances are included as per Clause 2.6.

Summary Table for Labour & Ancillary Work

flowchart TD
    A[Start: Work Item] --> B[Include Materials]
    B --> C[Include Labour (Separate)]
    C --> D[Include Ancillary Work]
    D --> E[Account for Waste & Cuttings]
    E --> F[Prepare Bills of Quantities]

This ensures clarity in costing and measurement per IS 1200 Part 11 standards.

IS 1200 Part 11: Description and Enumeration of Work Items

Key Points from Clauses:

• Clause 2.3:
  Each work item description includes:

  • Conveyance, delivery, handling, unloading, storing
  • Fabrication, hoisting
  • Labour for finishing to required shape/size
  • Setting, fitting, fixing in position
  • Straight cutting, waste allowance
  • Return of packings and incidental operations

• Clause 2.5:
  Bills of Quantities must:

  • Fully describe materials and workmanship
  • Accurately represent the work executed

• Clause 2.6:
  Cuttings include consequent waste unless stated otherwise.

• Clause 2.12 & 2.12.1:
  Curved, conical, spherical works:

  • Describe separately with radius
  • Labour measured separately

Specifications Summary:

Rounding Off Rules (General Practice):

• Values < 10 round to nearest 0.1
• Values ≥ 10 round to nearest whole number

flowchart TD
    A[Work Item Description] --> B[Conveyance & Delivery]
    A --> C[Handling & Unloading]
    A --> D[Fabrication & Hoisting]
    A --> E[Labour for Finishing]
    A --> F[Setting & Fixing]
    A --> G[Cutting & Waste]
    A --> H[Return of Packings]
    I[Curved/Conical/Spherical Work] --> J[Describe Radius]
    I --> K[Separate Labour Measurement]

This ensures comprehensive measurement and accurate billing of building works as per IS 1200 Part 11.

IS 1200 Part 11 (1977) - Units of Measurement & Rounding

Key Specifications:

• Dimensions: Measured net, as laid, in decimal system.
• Length & Breadth: Measured to nearest 0.01 m (before laying skirting, dado, plaster).
• Area: Calculated to nearest 0.01 m².
• Rounding: Final values rounded as per IS 2-1960 rules, maintaining the same significant figures as specified.

Measurement Includes:

• Conveyance, delivery, handling, unloading, storing
• Fabrication, hoisting, finishing to shape/size
• Setting, fitting, fixing, cutting, waste allowance
• Return of packings and incidental operations

Special Cases:

• Raking & curved cutting: Measured separately in running metres.
• Rounded external & coved internal angles: Measured separately with girth stated.

Summary Table: Units & Rounding

flowchart TD
    A[Measurement] --> B[Length & Breadth]
    B -->|Nearest 0.01 m| C[Dimension]
    A --> D[Area]
    D -->|Nearest 0.01 m²| E[Calculated]
    A --> F[Cutting]
    F --> G[Raking & Curved Cutting]
    F --> H[Rounded & Coved Angles]
    A --> I[Rounding]
    I --> J[IS 2-1960 Rules]

References:

• IS 1200 (Part XI) - 1977, Clauses 2.4, 2.3, 5.5
• IS 2-1960 (Rounding rules)

IS 1200 Part 11: Handling Repairs and Preparation of Surfaces

Key Specifications:

• Clause 2.9:

  • Repair work description must include the preparation of old surfaces to receive new material.

• Clause 6.1:

  • Provide details on:
    • (a) Composition and mix of repair material
    • (b) Thickness (excluding keys, grooves, open joints)
    • (c) Nature and treatment of base surface

• Clause 4.16:

  • Measure work on treads, risers, edges of landings separately (in m²).
  • Work on landings included in main item.

• Clause 5.3:

  • Sheet finishes on vertical, inclined, and horizontal surfaces measured separately.

Practical Notes on Surface Preparation & Repair:

• Surface Preparation:

  • Remove loose material, dust, grease.
  • Roughen smooth surfaces for bonding (e.g., wire brushing or sandblasting).
  • Wet surface before applying repair mortar to avoid suction.

• Typical Repair Thickness:

  • Usually between 5 mm to 50 mm depending on damage.

Common Formula for Repair Mortar Quantity:

[ \text{Volume of repair mortar} = \text{Area of repair} \times \text{Thickness of repair} ]

Measurement Summary Table:

flowchart TD
    A[Old Surface] --> B[Surface Preparation]
    B --> C[Cleaning & Roughening]
    C --> D[Wetting Surface]
    D --> E[Application of Repair Material]
    E --> F[Finishing & Curing]

Summary: IS 1200 Part 11 emphasizes detailed description of repair work including surface prep, mix, thickness, and base treatment. Separate measurement for treads/risers and finishes ensures accurate quantification.

IS 1200 Part 11: Special Conditions and Notes - Key Specifications

Key Particulars to be Specified (Clauses 2.3, 4.1, 5.1, 6.1)

• Tile/Slab/Block Units (Clause 4.1):

  • Kind (e.g., precast concrete, natural stone, woodblocks)
  • Thickness & size
  • Shape (if non-rectangular)
  • Surface finish (glazed, polished, etc.)
  • Fixing method (bedding)
  • Joint finishing (grouting, pointing)
  • Base nature (wood, concrete, screeded bed)
  • Usage location (flooring, skirting)
  • Joint layout

• Concrete Mix & Thickness (Clause 6.1):

  • Composition & mix details
  • Thickness (excluding keys/grooves)
  • Base nature & treatment

• Sheeting (Clause 5.1):

  • Type (linoleum, cork, rubber)
  • Thickness & quality
  • Fixing and joining method
  • Base nature

• General Description (Clause 2.3):

  • Includes conveyance, handling, fabrication, fixing, finishing, waste, and incidental operations

Summary Table of Particulars

This ensures clarity in measurement and execution as per IS 1200 Part 11:1977.

flowchart TD
    A[Special Conditions] --> B[Tiles/Slabs/Blocks]
    A --> C[Concrete Layer]
    A --> D[Sheeting]
    A --> E[General Description]
    B --> B1[Type, Size, Shape]
    B --> B2[Surface Finish]
    B --> B3[Fixing & Jointing]
    C --> C1[Mix Composition]
    C --> C2[Thickness]
    C --> C3[Base Treatment]
    D