Specification for floor door stoppers

IS 1823: Scope - Key Specifications & Tables

Scope Summary:

IS 1823 covers floor door stoppers including materials, dimensions, tolerances, and testing.

Key Materials & Suitable IS Grades (Clause 2.1):

Dimensions & Tolerances (Excerpt from Table 2):

Tolerances:

• A: +0.5 mm
• B: ±0

IS 1823 - Key Materials Specifications for Floor Door Stoppers

Rubber Specifications for Shock Absorption (Table 3)

Notes:

• Materials must conform strictly to the IS grades listed.
• Rubber must withstand ageing without loss of properties.
• Dimensions and tolerances are given in Table 2 with Fig. 1 (not shown here).

flowchart TD
    A[Floor Door Stopper] --> B[Body or Housing]
    A --> C[Spring]
    A --> D[Tongue]
    A --> E[Rubber Shock Absorber]

   

IS 1823: Dimensions and Tolerances for Floor Door Stoppers

1. Key Dimensions & Tolerances (Clause 4.2, Table 3)

Tolerances:

• A: +0.5 mm
• B: ±0.5 mm
• T1 (Casting & Sheet): +0.3 / -0 mm
• Others: No tolerance specified

2. Material Specifications (Clause 2.1, Table 1)

IS 1823: Manufacture and Finish of Floor Door Stoppers

1. Rubber for Shock Absorption (Clause 4.5 & Table 3)

• Rubber Properties:

• Fixing: Rubber piece fixed to cover plate using brass or mild steel screws.

2. Materials (Clause 2.1 & Table 1)

3. Dimensions & Tolerances (Clause 4.2 & Table 3)

IS 1823: Marking Specifications for Floor Door Stoppers

Key Marking Requirements (Clause 6.1 & 7.2)

• On each door stopper:

  • Manufacturer's name or trade-mark.
  • Size of shutter suitable for the stopper.

• On each cardboard box:

  • Manufacturer's name or trade-mark.
  • Size of shutter suitable.
  • Quantity in the package.

Material Specifications (Clause 2.1 Table 3)

Dimensions & Tolerances (Clause 4.2 Table)

IS 1823: Packaging & Specifications for Floor Door Stoppers

Packaging Requirements (Clause 7.1 & 7.2)

• Each door stopper must be wrapped in craft or polyethylene paper to prevent moisture ingress.
• Packed in cardboard boxes.
• Boxes must be marked with:
  • Manufacturer’s name/trademark,
  • Size of shutter suitable for the stopper,
  • Quantity per package.

Sampling for Quality Control (Clause 1.3 & Table 4)

• Random sampling from at least 10% of packages, max 3 packages.
• Equal number of stoppers selected from each package.
• Follow Table 4 for sampling scale and conformity criteria (not fully detailed here).

Material Specifications (Clause 2.1, Table 3)

Dimensions & Tolerances

• Refer Table 2 and Fig. 1 in IS 1823 for detailed dimensions of floor door stoppers.
• All dimensions in millimeters.

flowchart TD
    A[Door Stopper] --> B[Wrap in craft/polyethylene paper]
    B --> C[Pack in cardboard box]
    C --> D[Mark box with manufacturer, size, quantity]
    D --> E[Sampling per IS 1823 Clause 1.3]

This ensures protection, traceability, and quality compliance per IS 1823.

IS 1823: Sampling and Criterion for Conformity (Appendix A)

Sampling Method (Clause 8.1 & A-1.3)

• Select stoppers randomly from at least 10% of packages, max 3 stoppers per package.
• Equal number of stoppers from each selected package.

Scale of Sampling & Acceptance Criteria (Table A-1)

Number of Tests (Clause 7.2)

• Each box must be marked with:
  • Manufacturer's name/trade mark
  • Size of shutter compatibility
  • Quantity in the package

Summary:

• Random sampling from 10% of packages.
• Sample size and acceptance criteria depend on lot size.
• Maximum defective stoppers allowed varies from 0 to 5.
• Proper marking on packaging is mandatory for traceability.

flowchart TD
    A[Start: Lot of Floor Door Stoppers] --> B[Select 10% of packages]
    B --> C[Randomly select up to 3 stoppers per package]
    C --> D[Check sample size per Table A-1]
    D --> E{Count defective stoppers}
    E -->|Defective ≤ C| F[Accept Lot]
    E -->|Defective > C| G[Reject Lot]

IS 1823 Appendix A: Sampling Procedures & Conformity Criteria for Floor Door Stoppers

A-1. Scale of Sampling (Table A-1)

• Lot size: Total number of stoppers in the batch.
• Sample size: Number of stoppers to be randomly selected.
• Permissible defective: Maximum allowed defective stoppers for acceptance.

A-2. Number of Tests

• Select samples from at least 10% of randomly selected packages, max 3 packages.
• Equal number of stoppers from each package.
• All selected stoppers are tested for:
  • Dimensional requirements
  • Material quality
  • Manufacturing defects
  • Finish quality

A-3. Criterion for Conformity

• Any stopper failing any requirement is counted as defective.
• The lot is accepted if defective count ≤ permissible defective number (from Table A-1).
• Otherwise, the lot is rejected.

flowchart TD
    A[Start: Select Lot] --> B[Determine Lot Size]
    B --> C[Select Sample Size (Table A-1)]
    C --> D[Randomly select samples from ≥10% packages]
    D --> E[Test all samples for dimensions, material, finish]
    E --> F{Number of Defective ≤ Permissible?}
    F -- Yes --> G[Accept Lot]
    F -- No --> H[Reject Lot]

This sampling plan ensures quality control by statistically verifying batches against defined defect limits.