Method of measurement of building and civil engineering works, Part 14: glazing

IS 1200 Part 14: Introduction & Key Specifications for Glazing Measurement

• Scope (Clause 1.1): Covers methods for measuring glazing in buildings and civil engineering works.

• Material Description (Clause 2.6):

  • Glass types (plain, wired, frosted) must be described separately.
  • Wired glass requires description of wire design/pattern.
  • Frosted glass must specify if frosting is on one or both sides.

• Rounding Off (Clause 0.6):

  • Measurement results must be rounded as per IS 2:1960.
  • Retain the same significant figures as specified values.

• Area Measurement (Clause 2.4.2):

  • Areas should be calculated to the nearest 0.01 m².

Summary Table for Measurement

flowchart TD
    A[Identify Glazing Type] --> B{Type of Glass}
    B -->|Plain| C[Measure area]
    B -->|Wired| D[Describe wire pattern]
    B -->|Frosted| E[Specify frosting side]
    C --> F[Calculate area to 0.01 m²]
    D --> F
    E --> F
    F --> G[Round off as per IS 2:1960]

This ensures consistent, standardized measurement for glazing works as per IS 1200 Part 14.

IS 1200 Part 14: Scope & Key Specifications for Glazing Measurement

• Scope (Clause 1.1):
  Covers the method of measurement of glazing in buildings and civil engineering works.

• Area Measurement (Clause 2.4.2):
  Areas shall be measured and worked out to the nearest 0.01 m².

• Rounding Off (Clause 0.6):
  Values (observed or calculated) must be rounded off per IS 2:1960, maintaining the same number of significant figures as specified.

• Bills of Quantities (Clause 2.5):
  Must fully describe:

  • Method of measurement
  • Rules for rounding off
  • Materials and workmanship details

Summary Table for Measurement

This ensures uniformity and accuracy in glazing measurement and billing.

flowchart TD
    A[Glazing Work] --> B[Measure Area]
    B --> C[Round off to nearest 0.01 m²]
    C --> D[Apply IS 2:1960 rounding rules]
    D --> E[Prepare Bills of Quantities]
    E --> F[Include method, materials & workmanship]

IS 1200 Part 14 — General Rules for Measurement of Glazing

• Scope: Covers measurement methods for glazing in buildings and civil engineering works.

• Rounding Off (Clause 0.6):
  Values must be rounded as per IS 2-1960.

  • Retain the same number of significant figures as the specified value.

• Area Measurement (Clause 2.4.2):

  • Areas to be calculated to the nearest 0.01 m².

• Material Description & Measurement (Clause 2.6):

  • Different glazing sheets (glass, wired glass, frosted glass, etc.) measured separately.
  • For wired glass: specify design/pattern of reinforcement.
  • For frosted glass: specify if frosting is on one or both sides.

Summary Table for Measurement Precision

flowchart TD
    A[Start: Glazing Measurement] --> B{Type of Glass?}
    B -->|Plain Glass| C[Measure Area to 0.01 m²]
    B -->|Wired Glass| D[Describe Reinforcement Pattern]
    B -->|Frosted Glass| E[Specify Frosting Side(s)]
    C --> F[Round off as per IS 2-1960]
    D --> F
    E --> F
    F --> G[Record Separate Measurements]

This ensures clarity and uniformity in glazing measurement per IS 1200 Part 14.

IS 1200 Part 14: Clubbing of Items - Key Points

• Clubbing Criteria (Clause 2.1):
  Items can be clubbed only if they share detailed descriptions as per the standard. This ensures uniformity and clarity in measurement.

• Inclusive Description (Clause 2.3):
  Each item’s description includes conveyance, delivery, handling, loading, unloading, storing, and waste unless stated otherwise. This means these activities are not measured separately.

• Bills of Quantities (Clause 2.5):
  Bills must fully describe materials, workmanship, and method of measurement, ensuring the quantities represent the actual work accurately.

• Separate Measurement (Clause 2.7):
  Work involving wood, metal, concrete, etc., must be measured separately and not clubbed indiscriminately.

Summary Table: Clubbing Guidelines

Practical Tip:

• Do not club items of different materials or distinct processes.
• Use detailed item descriptions to decide clubbing eligibility.

flowchart TD
    A[Start: Item Description] --> B{Match Detailed Description?}
    B -- Yes --> C[Club Items Together]
    B -- No --> D[Measure Separately]
    C --> E[Include conveyance, handling, waste]
    D --> E

This ensures clarity and accuracy in measurement per IS 1200 Part 14.

IS 1200 Part 14: Booking of Dimensions - Key Points

• Dimension Order (Clause 2.2):
  Always book dimensions in the sequence:
  Length → Breadth/Width → Height/Depth/Thickness

• Pane Measurement (Clause 3.1.1):

  • Dimension = Clear opening dimension + width of rebates of structural member (window/door).
  • For non-rectangular panes, measure the smallest rectangular area that can contain the pane.
  • Straight cutting is included in the item.

• Accuracy (Clause 2.4.1):

  • Dimensions should be measured to the nearest 0.01 m (1 cm).

• Measurement System (Clause 2.4):

  • All measurements are net and recorded in the decimal system.

Summary Table for Booking Dimensions

flowchart TD
    A[Start Booking Dimensions] --> B[Measure Length]
    B --> C[Measure Breadth/Width]
    C --> D[Measure Height/Depth/Thickness]
    D --> E[Add Rebate Width (for panes)]
    E --> F{Pane Shape?}
    F -- Rectangular --> G[Use Clear Opening + Rebate]
    F -- Non-Rectangular --> H[Use Smallest Rectangular Area]
    G --> I[Record Dimensions to 0.01 m]
    H --> I
    I --> J[Use Decimal System for Net Measurement]

This ensures consistent, accurate, and standardized dimension booking as per IS 1200 Part 14.

IS 1200 Part 14: Description of Items – Key Points

• Clause 2.3 (General Description):
  Each item’s description includes conveyance, delivery, handling, loading, unloading, storing, and waste unless otherwise specified.

• Clause 2.6 (Glazing Sheets):

  • Different sheets (glass, wired glass, frosted glass) must be described and measured separately.
  • For wired glass, design or reinforcement pattern must be specified.
  • For frosted glass, specify if frosting is on one or both sides.

• Clause 2.1 (Clubbing Items):
  Items can be grouped together only if based on detailed descriptions per the standard.

• Clause 3.3 (Glass & Louvres):
  Glass and sheet louvres must be described and counted/enumerated distinctly.

Summary Table for Description of Items

This ensures clarity, accuracy, and uniformity in measurement and billing for construction items.

flowchart LR
    A[Item Description] --> B{Type of Item}
    B --> C[General Items]
    B --> D[Glass Sheets]
    B --> E[Louvres]
    C --> F[Includes conveyance, handling, storing, waste]
    D --> G[Specify wired/frosted glass details]
    E --> H[Enumerate separately]
    A --> I[Clubbing allowed if detailed description exists]

IS 1200 Part 14: Key Measurement Specifications

• Measurement Units & Precision:

  • All dimensions are measured in the decimal system.
  • Lengths are recorded to the nearest 0.01 m (Clause 2.4.1).
  • Areas are calculated and recorded to the nearest 0.01 m² (Clause 2.4.2).

• Measurement Basis:

  • Measurements are taken net, i.e., after fixing the work in position (Clause 2.4).

• Scope:

  • Applies to glazing works in buildings and civil engineering projects (Clause 1.1).

Summary Table for Measurement Accuracy

Practical Notes:

• Use calibrated measuring tools capable of reading to 0.01 m.
• For areas, multiply measured lengths and round off to 0.01 m².
• Ensure measurements are taken after installation to reflect net dimensions.

flowchart LR
    A[Start Measurement] --> B{Measure Length?}
    B -- Yes --> C[Record length to 0.01 m]
    B -- No --> D{Calculate Area?}
    D -- Yes --> E[Calculate area and round to 0.01 m²]
    D -- No --> F[Other measurements as per IS 1200]
    C --> G[Record net dimensions]
    E --> G
    F --> G
    G --> H[End]

IS 1200 Part 14 - Bills of Quantities: Key Points

• Purpose: Bills of Quantities (BoQ) fully describe materials, workmanship, and accurately represent the work scope for building and civil engineering projects.

• Measurement System:

  • All measurements are net and expressed in the decimal system (Clause 2.4).
  • Work in different materials (wood, metal, concrete, etc.) must be measured separately (Clause 2.7).

• Rounding Rules:

  • Numerical values are rounded off as per the revised rules (Clause 2.5).
  • Typically, quantities are rounded to two decimal places for accuracy and consistency.

• Measurement Method:

  • Measurements follow the detailed method of measurement for various works, ensuring uniformity.
  • For example, glazing work is measured as per Part 14 specifics.

Typical Formula for Quantity Calculation

Summary Diagram: Bills of Quantities Preparation Flow

flowchart TD
    A[Project Drawings & Specifications] --> B[Method of Measurement]
    B --> C[Measurement of Work Items (Net, Decimal)]
    C --> D[Apply Rounding Rules]
    D --> E[Separate Measurement by Material]
    E --> F[Prepare Bills of Quantities]
    F --> G[Estimate & Tendering]

Reference: IS 1200 Part 14 (1984) - Method of Measurement for Building and Civil Engineering Works (Glazing and related works).

IS 1200 Part 14: Measurement of Various Types of Glazing Sheets

Key Points from the Code:

• Separate measurement for each type of glazing material (glass, wired glass, frosted glass, etc.).
• Description required for wired glass (design/pattern of reinforcement).
• For frosted glass, specify if frosting is on one or both sides.
• Measurement is based on area of the glazing sheet.

Measurement Method:

• Measure the length × breadth of the visible glass surface in meters.
• Deduct any openings or rebates not glazed.
• Express the area in square meters (m²).
• Round off values as per IS 2-1960 rounding rules.

Typical Formula:

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

Notes:

• Wired glass: Describe reinforcement pattern.
• Frosted glass: Note frosting side(s).
• Different types of glazing sheets are measured separately and recorded distinctly.

flowchart LR
    A[Start] --> B[Identify glazing type]
    B --> C{Is it wired glass?}
    C -- Yes --> D[Describe reinforcement pattern]
    C -- No --> E{Is it frosted glass?}
    E -- Yes --> F[Specify frosting side (one/both)]
    E -- No --> G[Proceed to measurement]
    D --> G
    F --> G
    G --> H[Measure length and breadth]
    H --> I[Calculate area = length × breadth]
    I --> J[Record area separately for each type]
    J --> K[Apply IS 2 rounding]
    K --> L[End]

This ensures clarity and consistency in measuring glazing sheets per IS 1200 Part 14.

IS 1200 Part 14: Separate Measurement for Work in Different Materials

• Clause 2.7: Work in different materials (wood, metal, concrete, etc.) must be measured separately to avoid mixing quantities.

• Clause 3.1: Measurement of work is in square metres (m²), explicitly stating the thickness of the material layer.

• Clause 2.4: All measurements are to be taken net (actual work done) and recorded in the decimal system.

• Clause 2.4.2: Areas should be calculated and recorded to the nearest 0.01 m².

Key Specifications:

Measurement Formula:

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

• Record thickness separately (e.g., 0.15 m thick concrete slab).

flowchart LR
    A[Work in Different Materials] --> B[Measure Separately]
    B --> C[Calculate Area in m²]
    C --> D[Specify Thickness]
    D --> E[Record Net Measurement]
    E --> F[Round to Nearest 0.01 m²]

Summary: Always measure and record work for each material separately, in square meters with thickness, rounded to 0.01 m², ensuring clarity and accuracy in quantity estimation.

IS 1200 Part 14: Classification of Glazing Methods

IS 1200 Part 14 primarily focuses on the method of measurement of glazing rather than detailed design or classification. However, from the clauses and general practice, glazing can be classified based on:

Types of Glazing Materials (Clause 2.6)

• Clear Glass (plain float or annealed)
• Wired Glass (with reinforcement pattern described)
• Frosted Glass (specify if frosted on one or both sides)
• Other Sheets (acrylic, polycarbonate, etc.)

Key Specifications for Measurement

• Each type of sheet is measured separately.
• Reinforcement or pattern in wired glass must be described.
• Frosting details must be noted (one or both sides).

Measurement Rounding (Clause 0.6)

• Values are rounded per IS 2:1960.
• Retain the same number of significant figures as specified in the standard.

Typical Glazing Classification Table

Summary Diagram

graph TD
    A[Glazing Methods] --> B[Glass Sheets]
    A --> C[Plastic Sheets]
    B --> D[Clear Glass]
    B --> E[Wired Glass]
    B --> F[Frosted Glass]
    E --> G[Wire Pattern Description]
    F --> H[Frosted Side(s) Noted]

For detailed design or structural specifications, refer to IS 2553 (Code of Practice for Glazing in Buildings). IS 1200 Part 14 is strictly for measurement methodology.

IS 1200 Part 14 (1984) – Method of Measurement for Glazing

Key Specifications & Rules:

• Scope: Covers measurement of glazing works in buildings and civil engineering.
• Measurement System:
  • All measurements are net, in the decimal system (Clause 2.4).
  • Measurements taken after the work is fixed in position.
• Bills of Quantities (Clause 2.5):
  • Must fully describe materials, workmanship, and method of measurement.
  • Should accurately represent the executed work.
• Rounding Off:
  • Numerical values are rounded as per standard rules (usually to two decimal places).

Typical Measurement Items:

General Formula for Glass Area:

[ \text{Area} = \text{Length} \times \text{Breadth} \quad (\text{in meters}) ]

Summary of Method:

flowchart TD
    A[Start: Glazing Work Fixed] --> B[Measure Net Dimensions of Glass]
    B --> C[Calculate Area (Length × Breadth)]
    C --> D[Measure Frames, Beading, Putty]
    D --> E[Prepare Bills of Quantities with Descriptions]
    E --> F[Round Off Measurements]
    F --> G[Finalize Measurement for Payment]

For detailed item-wise measurement rules, refer to IS 1200 (Part 14) full text.

IS 1200 Part 14: Measurement of Glass Panes - Key Points

• Scope (Clause 1.1): Covers the method of measurement of glazing in buildings and civil engineering works.

• Types of Glass (Clause 2.6):

  • Measure and describe separately: plain glass, wired glass (specify wire pattern/design), frosted glass (specify if frosted on one or both sides).
  • Different materials or treatments must be clearly stated.

• Measurement of Panes (Clause 3.1.1):

  • Dimension = Clear opening + Width of rebates of the window/door structural member.
  • For non-rectangular panes, measure the smallest rectangular area from which the pane can be cut.
  • Straight cutting is included in the measurement item.

Summary Table for Glass Pane Measurement

Formula for Pane Area (Rectangular)

[ \text{Area} = (\text{Clear Opening Length} + 2 \times \text{Rebate Width}) \times (\text{Clear Opening Height} + 2 \times \text{Rebate Width}) ]

flowchart TD
    A[Clear Opening] --> B[Add Rebate Width]
    B --> C[Calculate Pane Dimension]
    C --> D[Measure Area]
    D --> E[Record Type & Details (wired/frosted)]

This method ensures uniform measurement for billing and specification compliance.

IS 1200 Part 14: Measurement of Circular Cutting

Key Points from Clauses:

• Clause 3.2: Circular cutting (including any curve) is measured as extra in running metres.
• Clause 2.4.1: Dimensions must be measured to the nearest 0.01 m.
• Clause 3.1.1: For non-rectangular panes, measure the smallest rectangular area from which the pane can be cut.
• Clause 3.6: Grinding, polishing, rounding of edges are measured in running metres.

Measurement Formula for Circular Cutting Length (L):

For a circular or curved edge, length is the arc length:

[ L = r \times \theta ]

• (r) = radius of the curve (m)
• (\theta) = central angle in radians

If angle is in degrees:

[ L = r \times \frac{\pi}{180} \times \theta^\circ ]

Measurement Steps:

1. Identify curve radius (r).
2. Measure central angle (\theta) in degrees or radians.
3. Calculate arc length (L).
4. Record length in running metres (nearest 0.01 m).

Summary Table:

flowchart LR
    A[Start] --> B[Identify curve radius (r)]
    B --> C[Measure central angle (θ)]
    C --> D[Calculate arc length L = r × θ (radians)]
    D --> E[Record length in running metres]
    E --> F[Include as extra measurement]

This ensures precise and standardized measurement of circular cuts as per IS 1200 Part 14.

IS 1200 Part 14: Enumeration of Glass and Sheet Louvres

Key Points from the Code:

• Clause 3.3: Glass and sheet louvres must be clearly described and enumerated separately.
• Clause 2.6: Different types of glazing sheets (glass, wired glass, frosted glass) are to be described distinctly, including details like reinforcement pattern or frosting side.
• Measurement: Louvres are measured by area (m²), counting only the actual glazed or sheet surface.

Specifications & Enumeration:

• Description includes:
  • Type of glass (plain, wired, frosted)
  • Thickness and pattern (if wired)
  • Frosting side (one or both)
  • Sheet material for louvres (metal, plastic, etc.)

Measurement Formula:

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

• Measure net visible glazed area excluding frames.
• Enumerate each type separately for accurate billing and specification.

Rounding Off:

• Use IS 2:1960 rounding rules.
• Maintain significant figures consistent with specified values.

flowchart TD
    A[Identify Louvres Type] --> B{Glass or Sheet?}
    B -->|Glass| C[Describe type: plain, wired, frosted]
    B -->|Sheet| D[Describe material and thickness]
    C --> E[Measure net glazed area (LxW)]
    D --> E
    E --> F[Enumerate separately & apply IS 2 rounding]

This ensures clear, standardized measurement and description of glass and sheet louvres per IS 1200 Part 14.

IS 1200 Part 14: Measurement of Removal of Old Glass (Glazing)

• Measurement Unit:

  • As per Clause 3.4, removal of old broken glass (hacking-out) is measured in square metres (m²).

• Description Requirements (Clause 2.6):

  • Specify type of glass sheet (e.g., wired glass, frosted glass).
  • For wired glass, mention design/pattern of reinforcement.
  • For frosted glass, indicate if frosting is on one or both sides.

• Method of Glazing (Clause 2.8):
  Measure separately based on glazing type:
  a) Front & back putty with sprigged or glazing pins
  b) Bedded in putty with beads
  c) Bedded in rubber/velvet with beads

Summary Table for Measurement

Formula for Area Measurement (if needed):

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

flowchart TD
    A[Old Glass Removal] --> B[Measure Area (m²)]
    B --> C{Glass Type}
    C -->|Wired| D[Describe Reinforcement]
    C -->|Frosted| E[One or Both Sides]
    B --> F[Glazing Method]
    F --> G[Putty + Pins]
    F --> H[Putty + Beads]
    F --> I[Rubber/Velvet + Beads]

This ensures clear, itemized measurement and description for removal and replacement of old glazing as per IS 1200 Part 14.

IS 1200 Part 14: Measurement of Drilled Holes

• Hole Enumeration (Clause 3.5):
  Each drilled hole must be recorded with:

  • Diameter of the hole
  • Type and thickness of the glass/sheet
  • Size of the pane

• Measurement Precision (Clause 2.4):

  • Linear dimensions measured to nearest 0.01 m (Clause 2.4.1)
  • Areas calculated to nearest 0.01 m² (Clause 2.4.2)
  • Measurements taken net, i.e., actual size fixed in place

Key Points for Drilled Hole Measurement:

Practical Formula for Area of Circular Hole:

[ A = \pi \times \left(\frac{d}{2}\right)^2 ]

• (d) = diameter of the hole (m)
• (A) = area of the hole (m²), rounded to nearest 0.01 m²

This ensures precise and standardized measurement for billing and quality control in construction works involving drilled holes.

IS 1200 Part 14: Measurement of Grinding, Polishing, and Edge Finishing of Glass

• Measurement Unit: As per Clause 3.6, grinding, polishing, and rounding off edges of glass or glazing sheets are measured in running metres (linear measurement along the edge).

• Description: Each type of edge finishing (grinding, polishing, rounding) should be clearly described before measurement.

• General Notes:

  • Different glazing sheets (glass, wired glass, frosted glass) must be described separately.
  • Specify reinforcement design for wired glass.
  • Indicate frosting on one or both sides if applicable.

Summary Table for Measurement

Practical Tips:

• Measure the total length of edges treated.
• Ensure proper documentation of the type of finish.
• For complex shapes, sum all edge lengths.

flowchart LR
    A[Glass Sheet] --> B[Edge Finishing]
    B --> C[Grinding]
    B --> D[Polishing]
    B --> E[Rounding]
    C --> F[Measure length in metres]
    D --> F
    E --> F

This ensures clarity in billing and quality control per IS 1200 Part 14.