Specification for burnt clay perforated building bricks

IS 2222: Scope & Key Specifications

• Scope: Covers dimensions, tolerances, and quality requirements for specified bricks.
• Rounding Off (Clause None): Final test/analysis values must be rounded per IS 2:1960, retaining the same significant figures as specified.
• Referenced Standards (Clause 2.1): Annex A lists essential Indian Standards related to this code.
• Dimensions & Tolerances (Clause 5.2):

• Note: Tolerances apply to individual brick measurements.
• Definitions (Clause 3.1): Terms as per IS 2248:1991 apply.

This ensures uniformity in brick sizing and quality assessment under IS 2222.

IS 2222:1991 - Referenced Indian Standards (Annex A)

This standard on burnt clay perforated building bricks references key Indian Standards essential for comprehensive understanding and compliance:

Key Points:

• These referenced standards define terminology, sampling methods, and test procedures for clay bricks.
• Compliance with IS 2222 requires adherence to these adjunct standards for quality control.
• The Standard Mark assures conformity under BIS supervision.
• Always use the latest edition or amendments of these standards.

Practical use:

• Use IS 2248 for terminology.
• Use IS 5454 for sampling procedures.
• Use IS 3495 for physical and mechanical tests on bricks.
• Use IS Parts 1-4:1991 for detailed specifications of building bricks.

flowchart LR
    A[IS 2222] --> B[IS 2248: Glossary]
    A --> C[IS 5454: Sampling]
    A --> D[IS 3495: Tests]
    A --> E[IS Parts 1-4: Brick Specs]

This ensures a holistic approach to brick quality and compliance under IS 2222.

IS 2222 - Key Definitions and Specifications

• Definitions:
  As per Clause 3.1, all definitions follow IS 2248:1991 (Burnt Clay Building Bricks). Refer to IS 2248 for terms like "Modular Brick," "Overburnt Brick," etc.

• Rounding Off (Clause 4):
  Final test or analysis values must be rounded as per IS 2:1960 rules, maintaining the same number of significant digits as the specified value.

• Dimensions & Tolerances (Clause 5.2):
  Permissible dimensional tolerances for bricks are:

• Annex A (Clause 2.1):
  Lists relevant Indian Standards necessary to complement IS 2222.

Summary Table for Brick Dimensions Tolerance

| Brick Dimension (mm) | Permissible Tolerance (mm) |
|----------------------|----------------------------|
| 70, 90               | ± 4                        |
| 110, 190             | ± 7                        |
| 230                  | ± 10                       |

For detailed definitions, always cross-reference IS 2248:1991.

IS 2222: General Quality Requirements - Key Points

• Definitions: As per IS 2248:1991 for terms related to steel tubes.

• Rounding Off (Clause 4):

  • Follow IS 2:1960 for rounding numerical values.
  • Retain the same number of significant figures as specified in the standard.

• Sampling & Conformity (Clause 8.1):

  • Use IS 5454:1978 procedures for sampling and acceptance criteria.

• Minimum Thickness (Clause 6.4):

  • Shell thickness ≥ 15 mm
  • Web thickness ≥ 10 mm

Summary Table: Minimum Thickness

Notes:

• Physical and mechanical properties must comply with relevant clauses (e.g., Clause 7).
• Testing and analysis results must be rounded as per IS 2:1960 to ensure uniformity.

flowchart TD
    A[Steel Tube] --> B{Component}
    B --> C[Shell: ≥ 15 mm]
    B --> D[Web: ≥ 10 mm]
    E[Testing] --> F[Rounding as per IS 2:1960]
    G[Sampling] --> H[IS 5454:1978 Procedure]

This ensures quality and uniformity in steel tube manufacturing per IS 2222.

IS 2222 - Dimensions and Tolerances for Burnt Clay Perforated Bricks

1. Standard Brick Sizes (Clause 5.1)

2. Permissible Tolerances (Clause 5.2)

• Tolerances apply to individual brick measurements.
• Dimensions must be measured per IS 2:1960 rounding rules.

3. Key Specifications (Clause 4.1)

• Bricks must be rectangular with sharp edges at right angles.
• Must be free from cracks, flaws, and free lime nodules.
• Uniform color and texture required.
• Made from suitable clay, burnt thoroughly at maturing temperature.

This ensures dimensional accuracy and quality for structural reliability and aesthetic consistency in masonry work.

IS 2222: Perforation Requirements for Burnt Clay Bricks

• Perforation Area (% of face area):
  30% ≤ Perforation Area ≤ 45% (Clause 6.1)

• Perforation Size Limits:

  • Rectangular perforations:
    • Larger side ‖ longer brick side
    • Shorter side < 20 mm (Clause 6.2)
  • Circular perforations: Diameter < 25 mm (Clause 6.2)

• Maximum Area of Each Perforation:
  ≤ 500 mm² (Clause 6.3)

• Distribution:
  Perforations must be uniformly distributed over the brick face (Clause 6.2).

Summary Table

Conceptual Diagram of Perforation Orientation

graph LR
A[Brick Face] --> B[Rectangular Perforations]
B --> C[Larger side || longer brick side]
B --> D[Shorter side < 20 mm]
A --> E[Circular Perforations]
E --> F[Diameter < 25 mm]

This ensures strength, uniformity, and adequate ventilation in walls made with perforated burnt clay bricks.

IS 2222: Physical Requirements Summary

• Minimum thickness:

  • Shell thickness ≥ 15 mm
  • Web thickness ≥ 10 mm
    (Clause 6.4)

• Dimensional tolerances for bricks (Clause 5.2):

• Rounding off values:
  Follow IS 2:1960 rules; retain the same number of significant digits as specified values.
  (Clause 7)

• Definitions:
  Refer IS 2248:1991 for terms used.
  (Clause 3.1)

Key Notes:

• Ensure physical dimensions meet these minimum thickness and tolerance requirements for structural integrity.
• Use proper rounding to maintain consistency in test/analysis results.

flowchart TD
    A[Start: Check Brick Dimensions] --> B{Dimension (mm)}
    B -->|70 or 90| C[Tolerance ±4 mm]
    B -->|110 or 190| D[Tolerance ±7 mm]
    B -->|230| E[Tolerance ±10 mm]
    C & D & E --> F[Check Thickness]
    F -->|Shell| G[≥ 15 mm]
    F -->|Web| H[≥ 10 mm]
    G & H --> I[Complies with IS 2222]

IS 2222: Sampling and Criterion of Conformity

• Sampling Procedure: As per Clause 8.1, sampling and conformity criteria follow IS 5454:1978. This standard details:

  • Sample size determination based on lot size.
  • Random sampling methods.
  • Acceptance/rejection criteria using statistical quality control.

• Conformity Criterion:

  • The test results must meet the specified limits after rounding off according to IS 2:1960 (same decimal places as specified values).
  • For bricks, Clause 7.4 limits average warpage to 3% max (tested per IS 3495 Parts 1-4).

Key Points Summary

Rounding Off Rule (IS 2:1960)

• If the digit to be dropped <5, leave last retained digit unchanged.
• If digit = 5 followed by zeros or no digit, round to nearest even digit.
• Else, round up the last retained digit.

flowchart TD
    A[Sampling as per IS 5454] --> B{Test Results}
    B -->|Meets Criteria| C[Accept Lot]
    B -->|Fails Criteria| D[Reject Lot]
    C --> E[Report with rounded values per IS 2]
    D --> E

This ensures quality compliance and uniform reporting for brick testing under IS 2222.

IS 2222: Marking of Burnt Clay Bricks

Key Specifications:

• Clause 9.1:
  Each brick shall be marked with the manufacturer's identification mark or initials in a suitable manner.

• Clause 9.1.1:
  Each brick may also be marked with the Standard Mark (BIS certification mark).

• Rounding Off Results:
  Test results or analysis values must be rounded off as per IS 2:1960 rules, retaining the same number of significant digits as specified.

Purpose of Marking

• Ensures traceability to the manufacturer.
• Confirms compliance with IS 2222 quality standards.
• Standard Mark indicates BIS certification and quality assurance.

Reference Table (from Clause 2.1 Annex A)

Summary Diagram

flowchart TD
    A[Brick Production] --> B[Marking with Manufacturer ID]
    B --> C{Is BIS Certified?}
    C -- Yes --> D[Mark with Standard Mark]
    C -- No --> E[No Standard Mark]
    D & E --> F[Distribution & Quality Assurance]

In brief: Mark bricks with manufacturer ID mandatorily; add BIS Standard Mark if certified, ensuring compliance and quality traceability.