Fanlight Catch -Specification

IS 364 - Scope Summary

• Purpose: Defines requirements for fanlight catches and their compliance evaluation.
• Rounding Rule: Final test or analysis values are rounded per IS 2:1960, retaining significant places as in the standard.

Sampling & Acceptance Criteria (Clause 10.2 & 10.4)

• Acceptance: Lot conforms if defectives ≤ permissible number; otherwise, it is rejected.

Referenced Standards (Annex A)

• IS 280: Mild steel wire
• IS 292: Leaded brass ingots
• IS 617: Aluminium ingots
• IS 733: Aluminium bars/rods
• IS 1079: Hot rolled carbon steel sheet
• IS 4905: Random sampling methods

This scope ensures quality control via sampling and testing, referencing relevant material standards and rounding rules for precise compliance.

IS 364: References - Key Points

• Clause 10.4: Defines criterion for conformity based on acceptance sampling.

  • A lot conforms if defectives ≤ acceptance number (Table 1, col 3).

• Annex A (Clause 2.1): Lists referred Indian Standards (IS) essential for materials and methods, e.g.:

  IS No.	Title
  280:1978	Mild steel wire for general engineering purposes
  292:1983	Leaded brass ingots and castings
  617:1975	Aluminium and aluminium alloys ingots and castings
  733:1983	Wrought aluminium and aluminium alloy bars, rods, sections
  1079:1988	Hot rolled carbon steel sheet and strip
  4454 (Part 1):1981	Steel wires for cold formed springs
  4905:1968	Methods for random sampling

• Rounding off rules: As per IS 2:1960, final test values must be rounded to the same significant figures as specified.

• Use of Standard Mark: Governed by BIS Act 1986, ensures compliance and quality control.

Summary Table for Acceptance Sampling (Example format)

Refer Table 1 of IS 364 for exact values.

Visual: Sampling Decision Flow

flowchart TD
    A[Sample Inspection] --> B{Defectives ≤ Acceptance Number?}
    B -- Yes --> C[Lot Accepted]
    B -- No --> D[Lot Rejected]

For detailed tables and exact acceptance numbers, refer to Table 1 of IS 364 and the listed IS standards in Annex A.

IS 364 – Fanlight Catches: Key Specifications & Dimensions

Types of Fanlight Catches (Clause 3.1)

• Mild steel fanlight catches (may be stove enamelled, Clause 7.3)
• Aluminium alloy fanlight catches
• Cast brass fanlight catches

Typical Design (Fig. 1)

• Fanlight catch size: 14 mm
• Components:
  • 6 coils spring
  • Inner diameter: 12 mm
  • Length: 20 mm
  • CSK hole for wood screw No. 8
  • Wood screw No. 8

Dimensional Tolerances (Clause 5.1)

Quality Checks (Clause 10.2)

• Dimensional conformity (Clause 5)
• Manufacturing defects (Clause 6)
• Finish quality (Clause 7)

Summary Diagram

graph LR
A[Fanlight Catch Types] --> B[Mild Steel (Stove Enamelled)]
A --> C[Aluminium Alloy]
A --> D[Cast Brass]
E[Design] --> F[14 mm size]
E --> G[6 coils, 12 mm ID, 20 mm length]
E --> H[CSK hole & Wood screw No.8]
I[Quality Checks] --> J[Dimensions]
I --> K[Manufacturing Defects]
I --> L[Finish]

This summarizes the key IS 364 clauses for fanlight catches.

IS 364: Materials - Key Specifications & Tables

Materials Reference Standards:

• Mild Steel Wire: IS 280:1978
• Aluminium & Alloys Ingots & Castings: IS 617:1975
• Wrought Aluminium & Alloy Bars, Rods, Sections: IS 733:1983
• Leaded Brass Ingots & Castings: IS 292:1983
• Hot Rolled Carbon Steel Sheet & Strip: IS 1079:1988
• Steel Wires for Cold Formed Springs: IS 4454 (Part 1):1981

Sampling & Conformity (Clause 10.2 & 10.4)

• Acceptance Criterion: If defectives ≤ permissible number, lot conforms.
• Rejection: If defectives > permissible number, lot does not conform.

Notes

• Final test values should be rounded per IS 2:1960 rules.
• Materials must comply with the latest referenced IS standards for quality and composition.
• Sampling ensures quality control via statistically valid inspection.

flowchart TD
    A[Lot Size] --> B{Select Sample Size}
    B -->|Up to 100| C[Sample 13]
    B -->|101-300| D[Sample 20]
    B -->|301-500| E[Sample 32]
    B -->|501-1000| F[Sample 50]
    B -->|1001+| G[Sample 80]
    C --> H{Defectives ≤ 0?}
    D --> I{Defectives ≤ 1?}
    E --> J{Defectives ≤ 2?}
    F --> K{Defectives ≤ 3?}
    G --> L{Defectives ≤ 5?}
    H -->|Yes| M[Accept Lot]
   

IS 364: Dimensions and Tolerances for Fanlight Catch

Key Dimensions & Tolerances (Clause 5.1)

• Dimensions must conform to Fig. 1 (not provided here).
• Tolerances ensure manufacturing precision.

Sampling & Acceptance Criteria (Clause 10.2 & 10.4)

• A lot is conforming if defectives ≤ permissible number.
• Otherwise, the lot is non-conforming.

Additional Notes

• Final test values should be rounded per IS 2:1960.
• Refer to related IS standards (e.g., IS 280, IS 292) for material specifications.

flowchart TD
    A[Lot Size] --> B[Select Sample Size]
    B --> C{Count Defectives}
    C -->|≤ Permissible| D[Lot Conforms]
    C -->|> Permissible| E[Lot Does Not Conform]

This summary ensures compliance with IS 364 dimensional and quality standards for fanlight catches.

IS 364: Manufacture and Workmanship — Key Specifications & Sampling Criteria

Clause 10.2 & 10.4: Sampling & Acceptance Criteria

• A lot is accepted if defectives ≤ permissible number; otherwise rejected.
• Sampling follows random selection as per IS 4905:1968.

Rounding Off Results:

• Follow IS 2:1960 rules for rounding numerical test results.
• Maintain same significant digits as specified values.

Referenced Material Standards:

• Mild steel wire: IS 280:1978
• Aluminium alloys: IS 617:1975, IS 733:1983
• Brass ingots: IS 292:1983
• Steel sheet & strip: IS 1079:1988
• Sampling methods: IS 4905:1968

flowchart TD
    A[Start: Lot of Fanlight Catches] --> B{Determine Lot Size}
    B --> |Up to 100| C[Sample 13 units]
    B --> |101 to 300| D[Sample 20 units]
    B --> |301 to 500| E[Sample 32 units]
    B --> |501 to 1000| F[Sample 50 units]
    B --> |1001 and above| G[Sample 80 units]
    C & D & E & F & G --> H[Inspect Sample for Defects]
    H --> I{Defectives ≤ Permissible Number?}
    I --> |Yes| J[Lot Accepted]
    I --> |No| K[Lot Rejected]

This ensures quality control by statistically verifying workmanship and manufacturing conformity per IS 364.

IS 364 - Finish: Key Specifications & Tables

Finish Specifications:

• Clause 7.3: Mild steel fanlight catches may be stove enamelled to any colour/finish as per purchaser's requirement.
• No strict finish tolerance is specified; finish quality depends on purchaser agreement.

Sampling & Quality Control (Related to Finish)

• Sampling per Clause 10.2 and acceptance criteria per Clause 10.4.
• Ensures finish conformity by limiting defective units in samples.

Rounding Off Values (Clause None)

• Final test or analysis values should be rounded per IS 2:1960 rules.
• Retain significant figures equal to those specified in IS 364.

Summary

• Finish: Stove enamelled mild steel as per purchaser.
• Quality control: Sampling and defect limits per Table 1.
• Rounding: IS 2:1960 rules for numerical values.

flowchart LR
    A[Lot of Fanlight Catches] --> B[Sample Selection per Table 1]
    B --> C{Defectives ≤ Permissible?}
    C -- Yes --> D[Lot Accepted]
    C -- No --> E[Lot Rejected]

This ensures finish quality and conformity in production.

IS 364 - Marking: Key Specifications & Tables

Marking Clause (8.1.1):

• Fanlight catches may be marked with the BIS Standard Mark, indicating conformity to IS 364.

Sampling & Acceptance Criteria (Clause 10.2 & 10.4)

• A lot conforms if defectives ≤ permissible number; otherwise, it is rejected.

Notes on Marking & Quality Control

• Use of Standard Mark governed by BIS Act 1986.
• Marking assures compliance under BIS supervision and continuous quality checks.
• Rounding off test results per IS 2:1960 rules.

flowchart LR
    A[Lot Size] --> B[Sample Size]
    B --> C[Check Defectives]
    C -->|Defectives ≤ Permissible| D[Lot Accepted]
    C -->|Defectives > Permissible| E[Lot Rejected]
    D --> F[Mark with BIS Standard Mark]

This summarizes marking and acceptance criteria per IS 364 for fanlight catches.

IS 364: Packing and Labelling Key Points

Packing (Clause 9.1)

• Material-specific wrapping:
  • Mild steel/brass fanlight catches: wrapped in paper.
  • Aluminium alloy fanlight catches: wrapped in tissue paper or polythene film.
• Packed in cartons as per usual trade practice.
• Each carton label must include:
  • Manufacturer's name/trade-mark.
  • Type of fanlight catches.
  • Quantity.

Labelling

• Labels on cartons must clearly show the above details to ensure traceability and compliance.

Sampling & Acceptance (Clause 10.2 & 10.4)

• Acceptance Criterion:
  Lot conforms if defectives ≤ permissible number; else rejected.

Rounding Off (General)

• Follow IS 2:1960 for rounding test results to the same significant figures as specified.

flowchart TD
    A[Fanlight Catches] --> B{Material Type}
    B -->|Mild Steel/Brass| C[Wrap in Paper]
    B -->|Aluminium Alloy| D[Wrap in Tissue/Polythene]
    C --> E[Pack in Cartons]
    D --> E
    E --> F[Label: Manufacturer, Type, Quantity]

This ensures protection, identification, and quality control per IS 364.

IS 364 - Sampling and Criteria for Acceptance

Sampling Plan (Clause 10.2 & 10.2.1)

• Sample size depends on lot size.
• Samples selected randomly (refer IS 4905:1968 for random sampling methods).

Acceptance Criteria (Clause 10.4)

• A lot conforms if defectives ≤ permissible number (col 3 above).
• If defectives exceed permissible, lot is rejected.

Rounding Off (Clause None)

• Follow IS 2:1960 for rounding test results.
• Maintain the same significant figures as the specified values.

flowchart TD
    A[Lot Size] --> B{Select Sample Size}
    B -->|Up to 100| C[Sample = 13, Max Defectives = 0]
    B -->|101-300| D[Sample = 20, Max Defectives = 1]
    B -->|301-500| E[Sample = 32, Max Defectives = 2]
    B -->|501-1000| F[Sample = 50, Max Defectives = 3]
    B -->|>1000| G[Sample = 80, Max Defectives = 5]
    C & D & E & F & G --> H{Count Defectives}
    H -->|≤ Max| I[Accept Lot]
    H -->|> Max| J[Reject Lot]

Summary: Use Table 1 for sample size and acceptance number, select randomly, and accept/reject lot based on defectives count.

IS 364 - List of Referenced Indian Standards (Annex A)

This standard references essential Indian Standards related to materials used in engineering and construction. Key referenced IS codes include:

Additional Notes:

• These standards specify material grades, chemical compositions, mechanical properties, and testing methods.
• IS 364 aligns with the latest versions of these standards for material specifications.
• For conformity, refer Clause 10.4 and Table 1 in IS 364 for acceptance criteria in sampling.

Summary Diagram of Reference Flow

graph LR
A[IS 364] --> B[IS 280: Mild Steel Wire]
A --> C[IS 292: Leaded Brass]
A --> D[IS 617: Aluminium Ingots]
A --> E[IS 733: Aluminium Bars & Rods]
A --> F[IS 739: Aluminium Wire]
A --> G[IS 1079: Hot Rolled Steel Sheets]
A --> H[IS 4454: Steel Wires for Springs]
A --> I[IS 4905: Sampling Methods]

For detailed material properties and testing, consult each referenced IS document directly.

Composition of Technical Committee (Annex B - IS 364)

The Builders Hardware Sectional Committee, CED 15 is responsible for preparing the standard. Key members include:

• Chairman: Shri P. Krishnan (CPWD, New Delhi)
• Representatives from:
  • Central Public Works Department
  • Delhi Development Authority
  • Railway Board (Ministry of Railways)
  • National Test House
  • Hindalco Industries Ltd
  • Ministry of Defence
  • Directorate General of Supplies & Disposals
  • Indian Institute of Architects
  • Central Building Research Institute (CSIR)
  • Indian Aluminium Co Ltd
  • Various private and government organizations

Member Secretary: Hemant Kumar, Joint Director (Civil Engg), BIS

Additional Notes:

• The committee includes alternates for most members.
• The committee oversees standardization, inspection, testing, and quality control.
• The use of the Standard Mark is governed by BIS rules under the Bureau of Indian Standards Act, 1986.

Summary Table of Committee Structure

If you need detailed acceptance criteria or sampling tables, refer to Clause 10.4 and Table 1 of IS 364.