wooden clothes' lockers - Specification

IS 5967 Part 1 — Scope and Key Specifications

This part covers strength requirements for tables and trolleys, focusing on sampling, testing, and permissible defects.

1. Sampling (Clause 9.1 & Table 3)

2. Test Loadings (Clause 2.1, Table 1)

3. Conditioning

• Timber parts: moisture content 12–15% (checked by electric moisture meter).

IS 5967 Part 1: Principles of Testing - Key Formulas, Tables, and Specifications

1. Test Loadings (Clause 2.1, Table 1)

Note: Vertical impact test is not applicable for test level 1.

2. General Requirements for Tests (Clause 2.1, Table 3)

• Different types of use (domestic, office, educational, hospital, etc.) require specific test levels (1 to 5).
• Example: Domestic use requires test levels 1, 2, 3, and 4.
• Moisture content for timber parts: 12-15%, measured by electric moisture meter.
• Standard conditioning atmosphere: 27 ± 3°C, 65 ± 5% RH.

3. Sampling and Permissible Defectives (Clause 9.1, Table 3)

IS 5967 Part 1: General Requirements for Tests

Key Test Loadings (Clause 2.1, Table 1)

General Requirements (Clause 3, Table 3)

• Test Levels are assigned based on Type of Use (e.g., Domestic, Office, Hospital).
• Example:
  • Domestic use requires test levels 1, 2, 3, and 4.
  • Educational use requires levels 4 and 5.
  • Military use requires level 5 only.

Additional Specifications

• Moisture content for timber parts: 12–15%, checked with electric moisture meter.
• Standard atmosphere for conditioning/testing:
  • Temperature: 27 ± 3 °C
  • Relative Humidity: 65 ± 5%
• Test setup:
  • Base

Inspection Before and After Testing (IS 5967 Part 1)

Key Specifications (Clause 4.1)

• Before Testing:

  • Thorough inspection of all members, joints, and attachments.
  • Note any existing defects to avoid misattribution after testing.
  • Complete dimensional check for articles prone to permanent deformation.
  • Tighten fittings in self-assembly furniture.

• After Testing:

  • Re-inspect thoroughly.
  • Record any new defects or changes since initial inspection.
  • Retighten fittings after each test level if multiple levels are tested.

Defects Affecting Strength to Record:

• Fractures in members, joints, or components.
• Permanent loosening of rigid joints.
• Increased free movement in top, legs, or components.
• Deformations affecting function or appearance.
• Audible noises during testing.

Sampling for Inspection (Clause 9.1, Table 3)

Test Loadings Reference (Table 1)

IS 5967 Part 1: Test Equipment and Apparatus - Key Specifications

1. Test Loadings (Clause 2.1, Table 1)

2. Sampling & Defect Limits (Clause 9.1, Table 3)

IS 5967 Part 1: Test Methods Summary

1. Test Loadings (Clause 2.1, Table 1)

Note: Vertical impact test not applicable at Level 1.

2. General Requirements (Clause 3, Table 3)

Interpretation of Results - IS 5967 Part 1 (Clause 7)

Key Criteria for Passing Tests:

• No visible defects after testing (see Clause 4).
• Permanent deflection of legs ≤ table height/14.

Sampling & Acceptance (Clause 9.1, Table 3)

Deflection Limit Formula:

[ \text{Max Permanent Deflection} = \frac{\text{Table Height}}{14} ]

Test Levels & Loads (Summary from Table 1):

Summary:

• Draw samples as per Table 3.
• Test articles at specified load levels.
• Pass if no defects and deflection ≤ table height/14.
• Use moisture content 12–15% for timber parts.
• Conditioning atmosphere: 27 ± 3°C, 65 ± 5% RH.

flowchart TD
    A[Start Testing] --> B{Defects Observed?}
    B -- Yes --> C[Fail]
    B -- No --> D{Deflection ≤ Height

IS 5967 Part 1 — Test Reporting: Key Formulas, Tables & Specifications

1. Deflection Limits (Clause 6.2)

• Sustained load test deflection limits:
  • Particle board: Span / 250
  • Wood: Span / 150
  • Other materials: Span / 100
• Horizontal static load test deflection limit:
  • Max deflection = 1 mm per 25 N horizontal force

2. Test Report Must Include (Clause 6.2)

• Article details tested
• Test level applied
• Defects before and after testing
• Test result: Pass/Fail

3. Test Loadings (Table 1, Clause 2.1)

4. Sampling Plan (Table 3, Clause 9.1)

IS 5967 Part 1 – Sampling of Tables and Trolleys

Sampling Procedure (Clause 9.1)

• Samples are drawn randomly from a lot.
• The sample size and permissible defectives depend on the lot size as per Table 3 below.

Table 3: Scale of Sampling and Permissible Number of Defectives

Key Test Deflection Limits (Clause 6.2)

• Sustained load test deflection limits:
  • Particle board: ≤ span/250
  • Wood: ≤ span/150
  • Other materials: ≤ span/100
• Horizontal static load test deflection: ≤ 1 mm per 25 N applied force

Summary Diagram

flowchart TD
    A[Lot of Tables/Trolleys] --> B[Random Sampling per Table 3]
    B --> C{Number of Defectives}
    C -->|≤ Permissible| D[Accept Lot]
    C -->|> Permissible| E[Reject Lot]

Use this sampling plan to ensure quality control per IS 5967 Part 1.