Method of measurement of building and civil engineering works, Part 16: laying of water and sewer lines including appurtenant items

IS 1200 Part 16: Scope - Key Specifications & Measurement Guidelines

Scope:
Covers measurement of building works related to sewers, drains, and sanitary fittings.

Key Clauses:

• Clause 2.4 (Dimensions):

  • Measure all work net as fixed to the nearest 0.01 m unless otherwise specified.

• Clause 2.5 (Bills of Quantities):

  • Items must fully describe materials and workmanship accurately representing the executed work.

• Clause 2.7 (Measurement in Stages):

  • Measure work in stages:
    • (a) Below ground/datum line
    • (b) Above ground/datum line
  • Specify the ground/datum line for each case.

• Clause 4.4 (Testing):

  • Sewer testing measured in running metres between manholes.

Summary Table for Measurement:

flowchart TD
    A[Start Measurement] --> B{Work Location}
    B -->|Below Ground| C[Measure depth from datum]
    B -->|Above Ground| D[Measure height from datum]
    C --> E[Record net measurement to 0.01 m]
    D --> E
    E --> F{Sewer Testing?}
    F -->|Yes| G[Measure running metres between manholes]
    F -->|No| H[Proceed with standard measurement]

This ensures consistent, precise measurement and billing for sewer and sanitary works under IS 1200 Part 16.

IS 1200 (Part 16) - General Rules Summary

This part covers methods of measurement for laying water and sewer lines and related appurtenant works.

Key Specifications & Rules:

• Clause 2.5: Bills of Quantities must clearly describe materials, workmanship, and accurately represent the work.
• Clause 1.1: Scope includes water and sewer line laying and appurtenant items.
• Clause 4.3.2: Miscellaneous items follow the method in Clause 3.4.2 (detailed measurement rules).
• Clause 4.4 (Table 4.3):
  • Testing of sewers is measured in running meters between manholes.

Measurement Principles:

Notes:

• For water supply, plumbing, and drains, refer to IS 1200 (Part XIX) - 1970.
• Numerical values should be rounded off as per the revised rules (not detailed here).

Conceptual Flow of Measurement:

flowchart TD
    A[Start: Work Description] --> B[Identify Item Category]
    B -->|Water/Sewer Lines| C[Measure Length in Running Meters]
    B -->|Miscellaneous Items| D[Apply Clause 3.4.2 Method]
    C --> E[Record in Bill of Quantities]
    D --> E
    E --> F[Apply Rounding Rules]
    F --> G[Finalize Measurement]

For detailed measurement methods and rounding rules, refer to the full IS 1200 Part 16 and related parts.

IS 1200 Part 16: Method of Measurement of Water Lines

Key Points:

• Measurement Unit:
  Pipes are measured in running metres along their central line between fittings or specials (Clause 3.1.1).

• Classification:
  Pipes are classified by:

  • Diameter
  • Material type
  • Quality

• Fittings & Specials:

  • All joints, fittings, and specials are enumerated separately.
  • Cutting pipes for jointing to fittings is included in the fittings' measurement.

• Beds, Benchings, and Covering:
  Measurement as per IS 1200 (Part II) - Concrete Work (Clause 2.9).

• Related Standards:

  • Plumbing and drains measurement: IS 1200 (Part XIX) - 1970
  • Earthwork: IS 1200 (Part I)

Summary Table for Pipe Measurement

flowchart LR
    A[Pipes] -->|Measure length| B[Running Metres]
    A -->|Classify| C[Diameter, Material, Quality]
    A -->|Between| D[Fittings & Specials]
    D -->|Enumerate separately| E[Count & Description]
    D -->|Cutting included| F[Pipe Cutting]
    G[Beds & Benchings] -->|Measure volume| H[IS 1200 Part II]

This ensures clarity and uniformity in measurement for water line laying works.

IS 1200 Part 16: Method of Measurement of Sewer Lines

Key Specifications:

• Measurement Unit: Running metres along the central line of sewer pipes.
• Classification: By
  • Diameter
  • Length of each pipe
  • Material type
  • Quality of pipe
  • Method of jointing
• Fittings/Specials: Measured separately as extra-over sewer length.
• Cutting & Jointing: Included with fittings/specials item; no separate measurement.

Measurement Rules:

• Measure sewer pipes between fittings along the centerline.
• Enumerate all joints, fittings, and specials separately.
• Miscellaneous works (supports, hangers, culverts, pavement cutting, pipeline deviations) measured as per relevant IS standards (e.g., IS 1200 Part 19 for plumbing).

Summary Table:

flowchart LR
    A[Sewer Line] -->|Measured in running metres| B[Pipe Length]
    A -->|Measured separately| C[Fittings/Specials]
    C -->|Includes| D[Cutting & Jointing]
    A -->|Miscellaneous works| E[Supports, Culverts, Pavement works]
    E -->|Measured as per relevant IS| F[Other IS Codes]

This ensures clear, consistent measurement for tendering and execution of sewer projects per IS 1200 Part 16.

IS 1200 (Part 16) - Manholes: Key Specifications & Measurement

• Depth Classification (Clause 4.2.1):
  Manholes are classified based on depth (top cover to invert of main drain):

  • Up to 0.5 m
  • 0.5 m to 1 m
  • 1 m to 2 m
  • 2 m to 3 m, etc.

• Measurement Method (Clause 4.2):

  • Measured in detail as per relevant IS codes or
  • Described and enumerated by depth groups.

• Testing Measurement (Clause 4.4):

  • Sewer testing measured in running meters between manholes.

Typical Manhole Measurement Summary

Additional Notes:

• Refer to IS 1200 Part 16 for detailed measurement rules of appurtenant items.
• Miscellaneous supports and works related to manholes follow other relevant IS codes (Clause 3.4.2).

flowchart TD
    A[Manhole] --> B[Top Cover]
    A --> C[Invert Level]
    B --> D[Depth = B to C]
    D --> E{Depth Classification}
    E --> F[<0.5m]
    E --> G[0.5-1m]
    E --> H[1-2m]
    E --> I[>2m]

For detailed design dimensions and structural specifications, refer to IS 456 and IS 1343 for concrete and prestressed concrete manholes respectively.

IS 1200 Part 16: Appurtenant Items Key Points

• Clause 4.3.1: Ventilating shafts, pumping mains, and other appurtenant items must be clearly described and enumerated. Measurement should follow detailed procedures as per relevant IS standards.

• Measurement:

  • Appurtenant items are measured either by detailed description or as per relevant IS.
  • For testing of sewers, measurement is in running metres between manholes (Clause 4.4).

• Clause 2.3 (Description of Items): Each item includes:

  • Conveyance, delivery, handling, unloading, storing.
  • Fabrication, hoisting, finishing to shape and size.
  • Setting, fitting, fixing, straight cutting, and waste.
  • All incidental operations and labor.

Typical Measurement Units for Appurtenant Items

Summary Formula for Sewer Testing Length:

[ L = \text{Distance between Manhole}_1 \text{ and Manhole}_2 \quad (\text{in metres}) ]

Diagram: Measurement of Sewer Testing Length

flowchart LR
    MH1[Manhole 1] -->|Length L| MH2[Manhole 2]
    MH2 -->|Length L| MH3[Manhole 3]

This ensures clear measurement of sewer sections for testing.

For detailed item-wise measurement, refer to relevant IS codes linked to specific appurtenant items.

IS 1200 Part 16 - Testing of Sewers: Key Points

• Measurement for Testing:
  As per Clause 4.4, testing measurement shall be in running metres between manholes.

• General Testing Measurement:
  Clause 3.3 states testing of pipelines is measured in running metres, unless otherwise specified.

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

Summary Table: Measurement for Sewer Testing

Additional Notes:

• Testing typically includes leakage, hydraulic, and structural tests.
• Measurement excludes manholes; only the length of pipe tested between manholes is considered.
• Ensure test sections are clearly defined in contract documents.

flowchart LR
    A[Manhole 1] -- Running Metres --> B[Pipe Section]
    B -- Running Metres --> C[Manhole 2]
    style A fill:#f9f,stroke:#333,stroke-width:2px
    style C fill:#f9f,stroke:#333,stroke-width:2px

For detailed testing procedures, refer to IS 1200 Part 16 and related sewer testing standards.

IS 1200 Part 16: Clubbing of Items – Key Points

• Clubbing of Items (Clause 2.1):
  Items can be combined ("clubbed") only if their detailed descriptions match as per the standard. This ensures clarity and avoids ambiguity in measurement and billing.

• Description of Items (Clause 2.3):
  Each item’s description implicitly includes:

  • Conveyance, delivery, handling, unloading, storing
  • Fabrication, hoisting, labour for finishing to shape/size
  • Setting, fitting, fixing in position
  • Straight cutting, waste allowance
  • Other incidental operations

• Appurtenant Items (Clause 4.3 & 4.3.2):
  Miscellaneous items related to the main work can be clubbed following the method in Clause 3.4.2 (usually detailed in Part 1 or relevant section), which typically allows inclusion of minor items with main items for simplicity.

Practical Summary for Clubbing Items

Diagram: Clubbing Process Overview

flowchart TD
    A[Identify Items] --> B{Descriptions Match?}
    B -- Yes --> C[Club Items Together]
    B -- No --> D[Measure Separately]
    C --> E[Include Appurtenant Items if Applicable]
    E --> F[Final Bill of Quantities]
    D --> F

Summary: Clubbing is permitted only when item descriptions align fully, including all associated operations and appurtenant items, simplifying measurement and billing per IS 1200 Part 16.

IS 1200 Part 16 - Booking of Dimensions: Key Points

• Sequence for Booking Dimensions (Clause 2.2):
  Dimensions must be recorded consistently in the order:
  Length → Breadth/Width → Height/Depth/Thickness

• Precision of Measurement (Clause 2.4):
  All dimensions are measured net as fixed, rounded to the nearest 0.01 m unless otherwise specified.

• Special Items (Clause 2.9):
  Measurement of beds, benchings, and coverings follows the method in IS 1200 Part II (1974).

• Bills of Quantities (Clause 2.5):
  Items must clearly describe materials, workmanship, and accurately represent the work.

Summary Table for Booking Dimensions

flowchart LR
    A[Booking Dimensions] --> B[Length]
    B --> C[Breadth / Width]
    C --> D[Height / Depth / Thickness]
    D --> E[Measure net, round to 0.01 m]

This ensures uniformity and accuracy in dimension booking for water supply and plumbing works under IS 1200 Part 16.

IS 1200 Part 16 (1979) - Description of Items: Key Points

• Clause 2.3 Description of Items
  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
  • Other incidental operations necessary for completion

• Clause 2.5 Bills of Quantities

  • Items must fully describe materials and workmanship
  • Should accurately represent the work executed

• Clause 2.1 Clubbing of Items

  • Items can be clubbed only if detailed descriptions conform to the standard

• Clause 4.3 Appurtenant Items

  • Includes related minor works or accessories necessary for the main item

Notes on Measurement and Rounding

• Numerical values are rounded as per IS 1200 general rules
• Measurement includes all operations unless specifically excluded

Summary Table: Description of Items Components

flowchart LR
    A[Description of Item] --> 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[Incidental Operations]

This ensures comprehensive coverage of all activities under each work item for accurate measurement and billing.

IS 1200 Part 16: Key Points on Dimensions

• Clause 2.4 Dimensions:

  • All measurements are net as fixed
  • Accuracy: to the nearest 0.01 metre unless otherwise specified

• Clause 2.2 Booking of Dimensions:

  • Consistent sequence:
    1. Length
    2. Breadth or Width
    3. Height or Depth or Thickness

• Clause 2.9 Bed, Benchings and Covering:

  • Measurement method as per IS 1200 (Part II) - 1974

• Clause 4.4 Testing (Table 4.3 Appurtenant Items):

  • Testing of sewers measured in running metres between manholes

Measurement Summary Table

Practical Notes

• Always measure net dimensions after fixing components.
• Maintain consistent dimension order to avoid confusion.
• For beds and benchings, refer to IS 1200 Part II for detailed measurement rules.
• Sewer testing length is linear distance between manholes, not surface area.

flowchart LR
    A[Start Measurement] --> B{Is it Bed/Benching?}
    B -- Yes --> C[Refer IS 1200 Part II]
    B -- No --> D{Is it Sewer Testing?}
    D -- Yes --> E[Measure running metres between manholes]
    D -- No --> F[Measure net dimensions to 0.01m]
    F --> G[Order: Length → Breadth/Width → Height/Depth]
    E --> H[Record length]
    C --> H
    G --> H

This ensures compliance with IS 1200 Part 16 for precise and consistent dimensioning in civil works.

IS 1200 Part 16 - Bills of Quantities: Key Points

• Item Description:
  Items must fully describe materials, workmanship, and accurately represent the work (Clause 2.5).

• Measurement of Pipes (Clause 3.1.1):

  • Pipes measured by running metres along the pipe's central line.
  • Classified by diameter, material, and quality.
  • Joints, fittings, and specials are measured and described separately.
  • Cutting pipes for fittings is included with the fitting item.

• Miscellaneous Items (Clause 4.3.2):
  Follow the method in Clause 3.4.2 (not detailed here, but generally means consistent measurement rules).

• Beds, Benchings and Covering (Clause 2.9):
  Measurement method as per IS 1200 Part II (Concrete Work).

General Measurement Formula for Pipes:

[ \text{Length (m)} = \sum \text{Measured along centerline between fittings} ]

Typical Bill of Quantities Table Structure:

flowchart LR
    A[Pipes] --> B[Measure length along centerline]
    B --> C{Fittings?}
    C -- Yes --> D[Measure fittings separately]
    C -- No --> E[Include in pipe length]

Summary: IS 1200 Part 16 emphasizes clear, separate measurement of pipes and fittings, with quantities in running metres and units for fittings, ensuring accuracy in Bills of Quantities.

IS 1200 Part 16: Work to be Measured Separately

Key Points from Clauses:

• Clause 2.6: Work executed under special conditions must be measured separately:

  • (a) In or under water
  • (b) In liquid mud
  • (c) In foul positions
  • (d) Interrupted by tides

• Clause 2.4: All dimensions measured net as fixed, to the nearest 0.01 m.

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

• Clause 4.3.2: For miscellaneous items, follow the method in Clause 3.4.2 (typically detailed measurement procedures).

Practical Application:

• Measure separately to account for:

  • Additional difficulty or risk
  • Special equipment or procedures
  • Time delays (e.g., tidal interruptions)

• Measurement units: Use linear, area, or volume units as appropriate, always net dimensions.

Example Table: Work Conditions & Measurement Notes

flowchart TD
    A[Work to be Measured Separately] --> B[In or Under Water]
    A --> C[In Liquid Mud]
    A --> D[In Foul Positions]
    A --> E[Interrupted by Tides]
    B --> F[Measure net dimensions]
    C --> F
    D --> F
    E --> F

Summary: IS 1200 Part 16 mandates separate measurement for complex conditions to ensure accurate billing and reflect additional efforts. Always measure net dimensions to 0.01 m precision.

IS 1200 Part 16: Measurement in Stages - Key Points

• Clause 2.7: Measurement Stages

  • Work is measured in two stages:
    • (a) Below ground/datum line
    • (b) Above ground/datum line
  • The ground/datum line must be clearly specified for each project.

• Clause 2.4: Dimensions

  • All measurements are taken net as fixed, rounded to the nearest 0.01 metre.

• Clause 3.1.1: Pipe Measurement

  • Pipes measured in running metres along the central line.
  • Classified by diameter, material, and quality.
  • Joints, fittings, specials are enumerated separately.
  • Cutting pipes for fittings is included in the fitting item.

• Clause 3.3: Testing

  • Testing length measured in running metres unless otherwise specified.

Summary Table: Measurement Categories

Practical Notes:

• Always state datum line elevation clearly.
• Measure net dimensions as fixed on site.
• For pipes, record fittings separately; pipe cutting included with fittings.
• Use 0.01 m precision for all linear measurements.

flowchart TD
    A[Start Measurement] --> B{Is work above or below datum?}
    B -->|Below| C[Measure depth from datum line]
    B -->|Above| D[Measure height from datum line]
    C --> E[Record net dimensions to 0.01 m]
    D --> E
    E --> F{Is pipe involved?}
    F -->|Yes| G[Measure running metres along centerline]
    G --> H[Enumerate fittings separately]
    F -->|No| I[Complete measurement]

This ensures clarity and uniformity in measurement per IS 1200 (Part 16).

IS 1200 Part 16 (1979) – Excavation and Earthwork: Key Points

• Measurement Basis: As per Clause 2.8, excavation and earthwork for pipelines and allied works follow IS 1200 Part 1 (1974) method of measurement.

• Measurement Stages (Clause 2.7):

  • Below ground/datum line
  • Above ground/datum line
    (Datum line must be clearly specified)

• Separate Measurement (Clause 2.6): Excavation must be measured separately if done:

  • In or under water
  • In liquid mud
  • In foul positions
  • Interrupted by tides

• Bills of Quantities (Clause 2.5): Must clearly describe materials, workmanship, and scope.

Typical Formula for Excavation Volume (IS 1200 Part 1 reference):

[ \text{Volume} = \text{Area} \times \text{Depth} ]

• For irregular shapes, use average end area or cross-sectional area methods.

Summary Table for Measurement Categories

flowchart TD
    A[Start Excavation] --> B{Location}
    B -->|Below Datum| C[Measure Depth & Area]
    B -->|Above Datum| D[Measure Height & Area]
    B -->|Water/Mud/Foul| E[Separate Measurement]
    C --> F[Calculate Volume]
    D --> F
    E --> F
    F --> G[Prepare Bill of Quantities]

Note: Refer IS 1200 Part 1 for detailed measurement methods and rounding rules.