Method of measurement of building and civil engineering works, Part 13: Whitewashing, colour washing, distempering and painting building surfaces

IS 1200 Part 13 (1994) — Scope & Key Specifications

Scope (Clause 1.1):
Covers methods of measurement for:

• White washing
• Colour washing
• Distempering
• Painting of building & civil engineering surfaces

Key Measurement Rules (Clause 3.1)

• Dimensions: Measured to nearest 0.01 m
• Areas: Calculated to nearest 0.01 m²

Special Provisions for RCC Jallies (Clause 3.7)

Note: For RCC jallies up to 50 mm thick, quantity is increased by 50% (one side painted) or 70% (both sides painted). For thickness > 50 mm, quantity is based on actual painted area.

Summary Table for RCC Jallies Painting Quantity

Notes

• Measurement is net, using decimal system.
• Sponge finished plaster and uneven surfaces converted to equivalent plain areas (latest revision).
• Rounding off per IS 2:1960 rules.

flowchart TD
    A[Start] --> B{Surface Type}
    B -->|RCC Jallies ≤ 50mm| C[Increase qty by 50% (1 side) or 70% (both sides)]
    B -->|RCC Jallies > 50mm| D[Use actual painted area]
    B -->|Others| E[Measure net area to 0.01 m²]
    C --> F[Calculate quantity]
    D --> F
    E --> F
    F --> G[Apply rounding per IS 2:1960]
    G --> H

IS 1200 Part 13: General Rules for Measurement of Painting & Finishing

Key Specifications & Formulas:

• Scope: Covers measurement methods for white washing, colour washing, distempering, and painting of building surfaces.

1. Deductions for Openings (Clause 3.2.1):

• Reveal deductions:
  • No addition for reveals, jambs, soffits, sills for openings ≤ 0.5 m².
  • For openings > 0.5 m², deductions depend on reveal widths and finish on each face.

2. Painting Quantity Adjustments for RCC Jallies (Clause 3.7):

3. Surface Area Increase for Uneven Surfaces (Clause 3.6):

Summary Formula for Painting Area:

[ \text{Equivalent Plain Area} = \text{Measured Area} \times (1 + \text{Surface Increase %}) ]

This ensures accurate estimation of quantities for painting and finishing works as per IS 1200 Part 13 guidelines.

Clubbing of Items - IS 1200 Part 13 (1994)

1. Clubbing Criteria (Clause 2.1):

• Items can be clubbed only if based on detailed item descriptions as per the standard.

2. Item Description Includes (Clause 2.3):

• Conveyance, delivery, handling, unloading, storing
• Waste, return of packings
• Necessary scaffolding, protective cover
• Cleaning stains from floors, walls, glass panes, etc.

3. Painting Measurement Adjustments (Clause 3.6 & 3.7):

• Surfaces to be painted should be clearly described; measurements may be flat or girthed.
• Uneven surfaces converted to equivalent plain areas by increasing area as follows:

• For RCC jallies (up to 50 mm thick):
  • Painted one side → increase quantity by 50%
  • Painted both sides → increase quantity by 70%
  • If thicker than 50 mm, use actual painted area.

flowchart TD
    A[Item Description] --> B[Includes conveyance, handling, waste, scaffolding, cleaning]
    B --> C[Clubbing Allowed if detailed description matches]
    C --> D[Painting Surfaces]
    D --> E[Convert uneven to equivalent plain area using % increase]
    E --> F[Adjust quantities for RCC jallies]

Summary: Club items only if detailed descriptions align. Include all handling and cleaning in item scope. Adjust painting areas for surface texture and RCC jallies as per specified percentages.

IS 1200 Part 13 - Booking of Dimensions: Key Points

1. Sequence of Booking Dimensions (Clause 2.2)

• Dimensions should be booked in the order:
  Length → Breadth/Width → Height

2. Measurement Accuracy (Clause 3.1)

• Dimensions measured to nearest 0.01 m.
• Areas/Volumes calculated to nearest 0.01 m² or m³.

3. Deductions & Additions for Openings (Clause 3.2.1)

4. RCC Jallies (Clause 3.7)

• For jallies ≤ 50 mm thick:
  • Increase quantity by 50% if painted one side.
  • Increase by 70% if painted both sides.
• For thickness > 50 mm, use actual painted area.

Summary Table: Deductions for Openings

IS 1200 Part 13: Description of Items – Key Points

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

  • Conveyance, delivery, handling, unloading, storing
  • Waste management and return of packings
  • Necessary scaffolding and protective covers
  • Cleaning stains from floors, walls, glass panes, etc.

• Clause 2.1 (Clubbing of Items):
  Items can be clubbed if based on detailed descriptions per the standard, ensuring clarity and completeness.

• Clause 2.4 (Bills of Quantities):
  Items must fully describe materials, workmanship, and accurately represent the work scope.

• Clause 2.6.1 (Preparatory Work):
  Preparatory work on new surfaces and primary coats must be included in the main item description.

Summary Table for Item Description Components

This ensures comprehensive coverage of all aspects related to the item, avoiding ambiguity in contracts and execution.

Key Specifications for Bills of Quantities (IS 1200 Part 13:1994)

• Clause 2.4: Each item must fully describe materials, workmanship, and accurately represent the work executed.

• Measurement Accuracy (Clause 3.1):

  • Dimensions to nearest 0.01 m
  • Areas/Volumes to nearest 0.01 m²/m³

• Painting Surface Measurement (Clause 3.6):

  • Surfaces measured flat or girthed.
  • Uneven surfaces converted to equivalent plain areas by increasing areas as follows:

• RCC Jallies Painting (Clause 3.7):
  • Thickness ≤ 50 mm: Increase quantity by 50% if painted one side.
  • Thickness > 50 mm: Increase by 70% if painted both sides.
  • For thicker jallies, quantity based on actual painted area.

Summary Formula for Painting Area Adjustment

[ \text{Adjusted Area} = \text{Measured Area} \times \left(1 + \frac{\text{Increase %}}{100}\right) ]

This ensures accurate and standardized measurement for preparation of bills of quantities.

IS 1200 Part 13: Number of Coats & Measurement for Painting

Key Points on Number of Coats (Clause 2.5)

• The number of coats for decorative treatments (white washing, colour washing, distempering, painting) must be clearly specified in the description.
• Each coat is measured separately as per the specification.

Surface Area Adjustment Factors (Clause 3.6)

To convert uneven surfaces into equivalent plain areas for measurement:

Measurement Notes

• Specify if measurements are flat or girthed (around corners).
• Grouping different surfaces is allowed by converting uneven surfaces using the above factors.

Summary Formula for Equivalent Area:

[ A_{eq} = A_{measured} \times \left(1 + \frac{\text{Percentage Increase}}{100}\right) ]

This ensures accurate quantity estimation for required coats in painting works.

IS 1200 Part 13 – Preparatory Work Summary

Preparatory work is essential before painting or finishing surfaces and must be included in the main measurement item.

Key Points from Clause 2.6:

• Preparatory activities include:

  • Brooming down
  • Steel wire brushing
  • Scraping
  • Washing
  • Rubbing down

• Scope:

  • On new surfaces and primary coats (Clause 2.6.1)
  • On old treated surfaces (Clause 2.6.2)

Specifications:

• Preparatory work is not measured separately but bundled with the main painting or finishing item.
• Ensure surfaces are clean, dry, and free from loose particles before applying paint or finish.

Practical Notes:

flowchart TD
    A[Surface] --> B{New or Old?}
    B -->|New| C[Primary Coat]
    B -->|Old| D[Old Treated Surface]
    C --> E[Preparatory Work]
    D --> E
    E --> F[Painting/Finishing]

Summary: Always include preparatory work in the main item measurement; it ensures better adhesion and finish quality per IS 1200 Part 13.

IS 1200 Part 13: Classification of Decorative Treatments (Clause 2.7)

Decorative treatments are classified and measured separately as:

• a) Whitewash, colour wash, etc.
• b) Non-washable distemper
• c) Washable distemper
• d) Waterproof paint (colour/colourless)
• e) Chalk whiting to cloth or hessian surface
• f) Linseed oil and cement to steel and iron work
• g) Cement slurry wash

Key Specification for RCC Jallies (Clause 3.7)

Notes:

• Materials and surface types must be fully described for accurate classification.
• Items can be clubbed if detailed descriptions match.

flowchart TD
    A[Decorative Treatments] --> B[Whitewash / Colour Wash]
    A --> C[Non-washable Distemper]
    A --> D[Washable Distemper]
    A --> E[Waterproof Paint]
    A --> F[Chalk Whiting]
    A --> G[Linseed Oil & Cement]
    A --> H[Cement Slurry Wash]

This classification helps in precise measurement and billing of painting and finishing works.

IS 1200 Part 13: Walls, Ceilings, etc. - Key Points

Measurement & Deductions (Clauses 2.8 & 3.2.1)

• Walls, ceilings, and sloping roofs measured separately.
• For openings ≤ 0.5 m²: No deduction for openings or additions for reveals, jambs, soffits.
• For openings > 0.5 m² and ≤ 3 m²:
  • Deduct opening area only on one face if both faces have the same finish.
  • If different finishes, deduct on side with smaller reveal width.
  • Full deduction if door frame width ≥ wall thickness.
  • Special rules apply when reveals exist on one or both sides.

Painting Surface Area Adjustments (Clause 3.6)

Uneven surfaces converted to equivalent plain areas by increasing area:

RCC Jallies (Clause 3.7)

• Thickness ≤ 50 mm: Increase quantity by 50% if painted one side.
• Thickness > 50 mm: Increase by 70% if painted both sides.
• Otherwise, use actual painted area.

Summary Table: Deductions for Openings

flowchart TD
    A[Measure Wall/Ceiling] --> B{Opening Size?}
    B -->|≤0.5 m²| C[No Deduction]
    B -->|>0.5 & ≤3 m²|

IS 1200 Part 13: Old Treated Surfaces - Key Points

• Measurement:

  • Old treated surfaces are measured separately (Clause 2.9).
  • Preparatory work on old treated surfaces is described and included in the main item (Clause 2.6.2).

• Preparatory Work Includes (Clause 2.7.1):

  • Priming and alkali neutralizing treatments
  • Scraping of surface
  • Washing surfaces spoiled by smoke, soot
  • Removal of oil and grease spots
  • Treatment for disinfection (efflorescence, mould, moss, fungi, algae, lichen)

• Specification:

  • All materials and treatments for old surfaces must be described separately.
  • For new surfaces, preparatory work and primary coats are included in the main item (Clause 2.6.1).

Summary Table

This ensures clarity in billing and quality control for renovation or repainting projects on old treated surfaces.

IS 1200 Part 13 (1994) - Key Measurement Rules Summary

1. Measurement Units & Precision (Clause 3.1)

• Dimensions: Measured to the nearest 0.01 m.
• Areas: Calculated in square meters (m²), to the nearest 0.01 m².
• Volumes (if applicable): To the nearest 0.01 m³.

2. Measurement Scope (Clause 1.1)

• Covers white washing, colour washing, distempering, and painting of building surfaces.

3. Special Deductions & Additions (Clause 3.7)

• For RCC jallies (reinforced cement concrete grills):
  • Up to 50 mm thick:
    • Painted one side: Increase area by 50%.
    • Painted both sides: Increase area by 70%.
  • For thickness > 50 mm, quantity based on actual painted area.
• Revised clause (2008) suggests:
  • Painting one side: 100% increase.
  • Painting one side + inside: 150% increase.
  • Painting both sides + inside: 200% increase.

Quick Reference Table: RCC Jallies Painting Area Adjustment

Notes:

• All measurements are net, i.e., actual executed work.
• Use decimal system for all calculations.
• Follow IS 2:1960 for rounding off numerical values.

flowchart TD
    A[Measure Dimensions] --> B[Round to nearest 0.01 m]
    B --> C[Calculate Area in m²]
    C --> D[Round Area to nearest 0.01 m²]
    D --> E{RCC Jallies?}
    E -->|Yes| F[Apply % Increase per Clause 3.7]
    E

IS 1200 Part 13 (1994) - Measurement Units & Precision Summary

• Units of Measurement:

  • All work measured net in square metres (m²).
  • Use decimal system as executed.

• Precision:

  • Dimensions measured to nearest 0.01 m.
  • Areas calculated to nearest 0.01 m².

• Painting on RCC Jallies (Clause 3.7):

  • For jallies ≤ 50 mm thick:
    • Painting one side → Increase area by 50%.
    • Painting both sides → Increase area by 70%.
  • For jallies > 50 mm thick:
    • Quantity based on actual painted area.

Measurement & Rounding Rules (per IS 2:1960)

• Final measurement values rounded to same decimal places as specified.
• Example: If dimension is 1.234 m, round to 1.23 m.

Quick Reference Table for RCC Jallies Painting:

This ensures uniformity and accuracy in measurement for cost estimation and billing in civil engineering works related to painting and surface finishing.

IS 1200 Part 13 — Deductions and Additions for Openings

Key Specifications (Clause 3.2.1 & 3.2.2)

• Openings ≤ 0.5 m²:

  • No deduction for jambs, soffits, sills, ends of joists, beams, posts.
  • No addition for reveals or finishes around openings.

• Openings > 0.5 m² and ≤ 3 m²:

  • Deduction made for opening area only (no addition for reveals).
  • Deduction rules depend on finish on wall faces:

• Openings > 3 m²:

  • Deduct opening area; measure jambs, soffits, reveals separately.

• No deductions for attachments like casings, conduits, pipes, wiring (Clause 3.3).

RCC Jallies (Clause 3.7)

Summary Formula for Deduction (for openings 0.5 to 3 m²):

[ \text{Deduction Area} = \begin{cases} \text{Opening Area} & \text{(one face, same finish)} \ 0.5 \times \text{Opening Area} & \text{(each face, equal reveal)} \ \text{Opening Area on side with smaller reveal} & \text{(different reveals)} \ \text{Full Opening Area on both faces} & \text{(door frame ≥ wall thickness)} \ \end{cases} ]

IS 1200 Part 13: Measurement of Corrugated Surfaces

Key Specifications & Formulas:

• Measurement Basis:
  Corrugated surfaces are measured flat as fixed, not girthed (Clause 3.4).

• Area Increase Factors for Corrugated Surfaces:
  To convert flat measured area to actual surface area, increase by:

  Surface Type	Increase %
  Corrugated steel sheets	14%
  Corrugated asbestos cement sheets	20%
  Semi-corrugated asbestos cement sheets	10%
  Nainital pattern roofs (plain sheeting)	10%
  Nainital pattern roofs with corrugated sheets	As applicable

• Painting Surface Area Adjustments (Clause 3.6):
  Uneven surfaces converted to equivalent plain areas by increasing measured flat areas:

  Surface Type	Increase %
  External walls with recessed/raised pointing	20%
  Sand face plaster (up to 4 mm aggregate)	50%
  Rough cast plaster (stone aggregate up to 10 mm)	100%
  Pebble dash finish (beyond 10 mm)	275%
  Sponge finished plaster	25%

• RCC Jallies Painting (Clause 3.7):
  Increase quantity by:

  • 50% if painted one side (up to 50 mm thick)
  • 70% if painted both sides (up to 50 mm thick)
  • Actual painted area if thicker than 50 mm

Formula for Corrugated Surface Area:

[ \text{Actual Surface Area} = \text{Measured Flat Area} \times \left(1 + \frac{\text{Increase %}}{100}\right) ]

Example:

If flat measured area of corrugated steel sheet = 100 m², actual surface area =
[ 100 \times (1 + 0.14) = 114 \text{ m}^2 ]

flowchart TD
    A[Measure Flat Area] --> B[Identify Surface Type]
    B -->