Method of Measurement of Building and Civil Engineering Works, Part XIX: Water Supply, Plumbing and Drains

IS 1200 Part 19 - Scope: Key Points & Specifications

• Scope Expansion:
  Originally for building works, now covers civil engineering works including industrial and river valley projects (Clause 0.4).

• Measurement Basis:
  Measurement is for work as fixed, net dimensions to the nearest 0.01 metre (Clause 2.4).

• Item Description Includes:
  Conveyance, delivery, handling, loading/unloading, storing, fabrication, hoisting, finishing, setting, fitting, cutting waste, packing returns, and incidental operations (Clause 2.3).

• Rounding Off Values:
  Final values (test or analysis) rounded per IS 2:1960, retaining the same significant figures as specified (Clause 0.6).

Summary Table

flowchart LR
    A[Work Item] --> B[Conveyance & Delivery]
    B --> C[Handling & Loading]
    C --> D[Fabrication & Hoisting]
    D --> E[Finishing & Setting]
    E --> F[Net Measurement (0.01 m)]
    F --> G[Final Rounded Value (IS 2:1960)]

This ensures consistent, comprehensive measurement for civil engineering projects under IS 1200 Part 19.

IS 1200 Part 19: General Principles of Measurement for Water Supply, Plumbing & Drains

Key Specifications:

• Scope: Measurement of water supply, plumbing, and drains in buildings and civil works.
• Measurement Unit: All dimensions measured net as fixed, to the nearest 0.01 metre (Clause 2.4).
• Rounding Off: Final values must be rounded per IS 2-1960, retaining the same significant figures as specified values (Clause 0.6).

General Rules:

• Measurements should be uniform and unambiguous to avoid disputes.
• Measurement systems must align with administrative and financial frameworks but strive for technical unification.
• Laying of water and sewer lines is covered separately in IS 1200 Part 16.

Practical Measurement Notes:

• Measure length, area, and volume strictly as per fixed work.
• Use net measurements excluding overlaps or wastage.
• Round dimensions and quantities consistently for clarity in billing and records.

flowchart LR
    A[Start Measurement] --> B[Identify Work Item]
    B --> C[Measure Net Dimensions]
    C --> D[Round Off as per IS 2-1960]
    D --> E[Record & Bill]

This ensures clarity, uniformity, and fair payment in civil engineering projects.

IS 1200 Part 19: Measurement of Pipes and Fittings

Key Specifications:

• Classification: By nominal diameter, material type, quality, and jointing method.
• Measurement Unit: Running metres (m).
• Measurement Line: Along the central line of pipes between fittings.
• Fittings: Elbows, bends, tees, connectors, unions, diminishing sockets included with pipes but enumerated separately.
• Cutting & Jointing: Included with fittings/specials, not measured separately.

Measurement Principles:

Nominal Diameter:

• As per relevant Indian Standards (e.g., IS 1239, IS 3589).

Summary Formula:

[ \text{Length of pipe} = \text{Measured along central axis between fittings} ]

flowchart LR
    A[Pipes] -->|Measured in running metres| B[Central Line Measurement]
    B --> C{Between fittings}
    C -->|Include joints| D[Pipes length]
    C -->|Fittings enumerated separately| E[Fittings & Specials]
    E --> F[Cutting & Jointing included]

This ensures accurate quantification for procurement and billing in pipeline works.

IS 1200 Part 19: Measurement of Pipe Accessories - Key Points

Classification & Measurement

• Pipes and fittings are classified by:

  • Nominal diameter
  • Material type
  • Quality
  • Jointing method

• Measurement is in running metres along the central line of pipes between fittings.

Inclusion of Fittings

• Standard fittings (elbows, bends, tees, connectors, unions, diminishing sockets) are included with pipes but enumerated separately.
• Cutting and jointing pipes to fittings are included in the fitting item cost.

Measurement Guidelines

• Pipes measured between fittings.
• Fittings and specials are measured separately and described.
• Drain pipes measured inclusive of joints, but fittings are extra.

Summary Table for Measurement

This approach ensures clear quantification for billing and execution per IS 1200 Part 19.

IS 1200 Part 19 (1981) – Measurement of Plumbing Fixtures and Fittings

Key Specifications & Measurement Guidelines (Clause 5.5):

• Items to be measured:

  • Water closets (washdown, squatting, siphonic types)
  • Wash basins, laboratory sinks, urinals (bowl, half stall, squatting plate types)
  • Partition slabs, foot rests, shower roses
  • Traps for squatting pans, universal water closets
  • Flushing cisterns (automatic, siphonic types)
  • Brackets, supports, bath tubs, cast iron gratings
  • Mixing valves, water closets seats, self-closing taps
  • Kitchen sinks, waste fittings, waste plugs, water spreaders, half round channels

• Measurement principles:

  • Enumerate and fully describe each fixture/fitting
  • Include fixing and accessories with the item
  • Measurement is usually per item or as per specified unit (e.g., per basin, per cistern)
  • No separate measurement for small accessories unless specified

Typical Measurement Table (Indicative):

Additional Notes:

• Follow IS 1200 Part 19 for detailed descriptions and item-wise measurement rules.
• Fixing and accessories integral to the fixture are included in the item measurement.
• For composite items (e.g., water closet with cistern), measure as a single unit unless otherwise stated.

flowchart TD
    A[Plumbing Fixtures] --> B[Water Closets]
    A --> C[Wash Basins]
    A --> D[Urinals]
    A --> E[Bath Tubs]
    A --> F[Shower Roses]
    A --> G[Traps & Waste Fittings]
    B --> B1[Wash

IS 1200 Part 19: Measurement of Drains, Manholes, and Inspection Chambers

Key Specifications & Formulas:

• Depth Classification of Manholes/Inspection Chambers (Clause 6.2.1):

  • Depth = Distance from top of manhole cover to invert of main drain.
  • Classified into groups by depth:
    • Up to 0.5 m
    • 0.5 m to 1 m
    • 1 m to 2 m
    • 2 m to 3 m, etc.

• Measurement Details (Clause 6.2):

  • Manholes and inspection chambers measured as per detailed IS guidelines.
  • Enumerate and describe each item by size, depth, and type.

• Concrete Works (Clause 3.7):

  • Concrete beds, haunchings, coverings measured in running meters.
  • Specify pipe size, concrete dimensions, and mix.

Typical Measurement Table for Manholes (Example):

Notes:

• Measurement includes excavation, concrete work, brickwork, and cover slabs.
• For drains, measure length in running meters, specifying pipe size and material.
• Manholes and inspection chambers are enumerated separately with depth classification.

flowchart TD
    A[Start] --> B{Measure Manhole/Inspection Chamber}
    B --> C[Record Top Cover to Invert Depth]
    C --> D{Classify Depth}
    D -->|0-0.5 m| E[Group 1]
    D -->|0.5-1 m| F[Group 2]
    D -->|1-2 m| G[Group 3]
    D -->|>2 m| H[Group 4]
    E --> I[Enumerate & Describe]
    F --> I
    G --> I
    H --> I
   

IS 1200 Part 19: Measurement of Excavation and Refilling for Pipelines

Key Points & Specifications:

• Excavation & Refilling Measurement:
  As per IS 1200 Part 1 (1974), measure excavation volume by calculating the cross-sectional area × length of the trench.

  • Include the entire trench profile (width × depth).
  • Separate measurement for below and above datum/ground line (Clause 2.7).

• Pipeline Measurement (Clause 6.1.1):

  • Measure pipes by running metres along the pipe centerline between fittings.
  • Classify pipes by nominal diameter, material, and quality.
  • Joints and fittings are measured separately.

• Concrete Beds and Haunchings (Clause 3.7):

  • Measure in running metres, specifying pipe size, concrete dimensions, and mix.

Typical Formula for Excavation Volume:

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

Where,
[ \text{Cross-sectional Area} = \text{(Trench width)} \times \text{(Trench depth)} ]

Measurement Stages (Clause 2.7):

Summary Table:

flowchart TD
    A[Start] --> B[Excavation Measurement]
    B --> C[Calculate Cross-sectional Area]
    C --> D[Multiply by Length]
    D --> E[Separate below/above datum]
    A --> F[Pipe Measurement]
    F --> G[Measure running metres]
    G --> H[Classify

IS 1200 Part 19: Measurement of Concrete Beds and Haunchings

Key Specifications:

• Measurement Unit: Running metres (m)
• Details to Record:
  • Size of pipe
  • Dimensions of concrete bed/haunching
  • Concrete mix specification

Measurement Guidelines:

• Include formwork required for beds and haunchings in measurements.
• Measure in stages according to Clause 2.7:
  • Below ground/datum line
  • Above ground/datum line
• Specify the datum line clearly for reference.

Reference to Excavation:

• Excavation and refilling for trenches measured as per IS 1200 Part 1 (1974).

Typical Measurement Formula for Concrete Volume in Haunchings:

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

Where cross-sectional area depends on bed/haunch dimensions around the pipe.

Example Table for Haunching Dimensions (Indicative):

Summary:

• Measure concrete beds & haunchings in running metres.
• Record pipe size, concrete dimensions, and mix.
• Include formwork in measurements.
• Use staged measurement relative to datum line.
• Refer excavation measurement to IS 1200 Part 1.

flowchart LR
    A[Start: Define Pipe Size] --> B[Determine Haunch Dimensions]
    B --> C[Calculate Cross-sectional Area]
    C --> D[Measure Length in Running Metres]
    D --> E[Compute Volume = Length × Area]
    E --> F[Record Concrete Mix & Formwork]
    F --> G[Final Measurement Entry]

This ensures uniformity and clarity in concrete bed and haunching measurement per IS 1200 Part 19.

IS 1200 Part 19 (1981) - Measurement of Insulating Coverings

Key Specifications & Measurement Rules:

• Measurement Units:

  • Boilers, cylinders, tanks: Measured in square metres (m²).
  • Pipes: Measured in running metres (m) with diameter stated.

• Deductions & Extras:

  • No deduction for manholes, hand holes, pipes passing through insulation.
  • No extra measurement for finishing insulation around such openings.
  • Insulation on bends, elbows, tees, valves, etc.: Measured extra over the straight runs.

Summary Table:

Practical Formula for Pipe Insulation Length:

[ \text{Length} = \text{Running length of pipe} \quad (\text{m}) ]

Diameter must be specified for clarity in measurement.

flowchart LR
    A[Pipes] --> B[Measure length in running metres]
    B --> C[State pipe diameter]
    A --> D[Add extra for fittings (bends, elbows, tees)]
    E[Boilers/Tanks] --> F[Measure surface area in m²]
    G[Openings] -.-> F
    G -.-> B
    note["No deduction or extra for openings"]

This ensures uniformity and clarity in billing and execution of insulating works per IS 1200 Part 19.

IS 1200 Part 19: Measurement in Special Conditions

This part deals with measurement methods for water supply, plumbing, and drains in buildings, emphasizing uniformity and clarity.

Key Specifications for Special Conditions (Clause 2.6)

Work executed under the following conditions must be measured separately to ensure accuracy and fair payment:

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

Rounding Off (Clause 0.6)

• Final measurement values must be rounded off per IS 2-1960.
• The number of significant digits in the rounded value should match the specified value.

Notes:

• Measurement of laying water/sewer lines is covered under IS 1200 Part XVI (1979).
• Separate measurement ensures clarity in cost and execution complexities.

Summary Table: Special Conditions for Separate Measurement

flowchart LR
    A[Work Execution] --> B{Special Conditions?}
    B -->|Yes| C[Measure Separately]
    B -->|No| D[Measure Normally]

This ensures clarity and uniformity in civil engineering measurement practices under challenging site conditions.

IS 1200 (Part 19) - Booking and Rounding Off Dimensions

Key Rules for Booking Dimensions (Clause 2.2)

• Dimensions are booked in order:
  Length → Breadth/Width → Height/Depth/Thickness.
• This ensures consistency in recording and referencing dimensions.

Rounding Off Dimensions (Clause 0.6 & 2.4)

• Round off numerical values as per IS 2:1960 (Rules for rounding off numbers).
• Retain the same number of significant digits as specified in the standard.
• Measure and record all dimensions to the nearest 0.01 metre unless otherwise specified.

Description of Items (Clause 2.3)

• Item descriptions include all related operations such as:
  • Conveyance, delivery, handling, loading/unloading
  • Storing, fabrication, hoisting
  • Labour for finishing, setting, fitting, fixing
  • Straight cutting, waste, return of packings
  • Other incidental operations

Summary Table for Dimension Booking & Rounding

flowchart LR
    A[Start: Measure Dimension] --> B[Record Length]
    B --> C[Record Breadth/Width]
    C --> D[Record Height/Depth/Thickness]
    D --> E[Round off as per IS 2:1960]
    E --> F[Dimension Booked]

This ensures clarity, uniformity, and precision in measurement and documentation per IS 1200 Part 19.

IS 1200 Part 19 - Clubbing of Items & Description Requirements

Key Clauses & Specifications:

• Clubbing of Items (Clause 2.1):
  Items can be clubbed if the detailed breakup is agreed upon based on item descriptions.

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

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

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

• Special Items (Clause 4.1):
  Caps, collars, plugs, stopped ends, etc., must be described and enumerated separately.

Summary Table for Item Description Components:

Notes:

• Clubbing simplifies bills but requires clear breakup.
• Detailed descriptions ensure no ambiguity in measurement and payment.
• Always refer to the latest revision for rounding rules and measurement methods.

flowchart TD
  A[Start: Item Description] --> B{Clubbing Allowed?}
  B -- Yes --> C[Agree on Detailed Breakup]
  B -- No --> D[Describe Item Individually]
  C --> E[Include All Operations]
  D --> E
  E --> F[Prepare Bill of Quantities]
  F --> G[Work Execution & Measurement]

This ensures clarity and accuracy in measurement and billing as per IS 1200 (Part 19).