returnable wooden crates for vegetables

IS 7698: Scope - Key Specifications & Tables

Scope:
IS 7698 covers specifications for wooden crates used for packaging, focusing on materials, dimensions, construction, and testing.

Key Specifications:

• Materials: Wooden components with specified dimensions and tolerances.
• Testing: Drop test from 1 m height (Appendix B, Clause 6.2) to simulate transit conditions.
• Sampling: Defined sample sizes and permissible defects based on lot size (Clause 7.3).

Important Tables:

Table 1: Dimensions of Wooden Components (Clause 3.2)

Table 3: Sampling & Defect Criteria (Clause 7.3)

Drop Test (Appendix B, Clause 6.2)

• Fill crate to nominal capacity with vegetables or equivalent.
• Drop twice from 1 m height on concrete.
• Check for visible failures immediately after.

Units (SI Units as per IS 7698)

• Length: metre (m)
• Mass: kilogram (kg)
• Force: newton (N) = kg·m/s²
• Pressure: pascal (Pa) = N/m²

flowchart TD
    A[Wooden Crate Components] --> B[End Boards (6 pcs, 300x75x6 mm)]
    A --> C[Side Boards (6 pcs, 500x75x6 mm)]
    A --> D[Bottom Boards (4 pcs, 500x

IS 7698 - Definitions & Key Specifications

1. Definitions (Clause 2.0)

• Definitions in IS 7698 supplement those in IS 707-1961 and IS 6703-1972.
• Covers terminology related to wooden crates and packaging.

2. Dimensions (Clause 3.1 & 3.2)

Note: Dimensions are actual after sawing allowances.

3. Drop Test (Appendix B, Clause 6.2)

• Crate filled to nominal capacity with vegetables or equivalent.
• Dropped twice from 1 m height on concrete.
• Checked for visible failures immediately after.

4. Units (SI Units Table)

• Length: metre (m)
• Mass: kilogram (kg)
• Force: newton (N) = 1 kg·m/s²
• Pressure: pascal (Pa) = 1 N/m²
• Energy: joule (J) = 1 N·m
• Power: watt (W) = 1 J/s

flowchart TD
    A[Crate Dimensions] --> B[Length 500 mm]
    A --> C[Width 300 mm]
    A --> D[Depth 350 mm]
    E[Wooden Components] --> F[End boards: 300x75x6 mm]
    E --> G[Side boards: 500x75x6 mm]
    E --> H[Bottom boards: 500x75x10 mm]
    E --> I[Corner posts: 350x50x50 mm]
    J[Drop Test] --> K[Fill crate to capacity]
    J -->

IS 7698: Dimensions and Tolerances Summary

1. Crate Overall Dimensions (Clause 3.1)

2. Wooden Components Dimensions (Clause 3.2, Table 1)

Note: Dimensions are actual after sawing allowances.

3. Tolerances (Clause 3.3)

Practical Notes:

• Tolerances apply to all dimensions to ensure fit and function.
• Corner posts are made by cutting 2 pieces into 4 parts each, cross-section 50×50 mm.
• Dimensions should be rounded as per standard rounding rules.

graph TD
A[Crate] --> B[End Boards: 300x75x6]
A --> C[Side Boards: 500x75x6]
A --> D[Bottom Boards: 500x75x10]
A --> E[Corner Posts: 350x50x50 (cut into 4)]

This ensures uniformity and interchangeability of wooden crate components per IS 7698.

IS 7698: Key Specifications & Tables for Materials

1. Wooden Components Dimensions (Clause 3.2, Table 1)

Dimensions are actual after sawing allowances.

2. Drop Test (Clause 6.2, Appendix B)

• Crate filled to nominal capacity with vegetables or equivalent.
• Drop twice from 1 m height on level concrete.
• Check for visible failure immediately after.

3. Sampling for Quality Checks (Clause 7.3, Table 3)

4. Units & Symbols (SI Units)

This summary covers essential material dimensions, testing, sampling, and units per IS 7698. For detailed construction or material specs, refer to respective clauses.

IS 7698: Key Construction Specifications & Tables

1. Material Specification

• Plywood thickness: 4.0 ± 0.2 mm, CWR grade per IS 303-1975 (Clause 4.1.4)
• Suitable timber species as per timber packaging standards.

2. Construction Details (Clause 5.1)

• Bottom, side, and end boards fixed to corner posts (see Fig. 1 in IS 7698).
• Nailing details per Table 2 below:

3. Sampling for Quality Control (Clause 7.3, Table 3)

Summary Diagram: Nailing Points on Crate

graph LR
  Posts[Corner Posts]
  SideBoards[Side Boards]
  EndBoards[End Boards]
  BottomBoards[Bottom Boards]

  Posts -->|Nail 1 x 12mm| SideBoards
  SideBoards -->|Nail 1 x 12mm| EndBoards
  EndBoards -->|Nail 2 x 24mm| Posts
  BottomBoards -->|Nail 2 x 16mm| EndBoards
  SideBoards -->|Nail 6 x 12mm| BottomBoards

This ensures structural integrity and compliance with IS 7698 for wooden vegetable crates.

IS 7698: Performance Tests Key Points

1. Mass Limitation (Clause 5.6)

• Total mass of crate + contents ≤ 20 kg.

2. Sampling for Performance Tests (Clause 7.4)

• For each performance test, 20 samples are drawn from a lot size of 1000 or less.

3. Drop Test Procedure (Clause 6.2, Appendix B)

• Crate filled to nominal capacity with vegetables or equivalent material.
• Drop crate twice from a height of 1 meter onto a level concrete surface.
• Inspect immediately for visible failure.

4. Criteria for Conformity (Clause 7.5)

• Number of defective crates ≤ limits in Table 3 (not provided here).
• Maximum 1 crate failure allowed per performance test.

Summary Table: Drop Test Parameters

flowchart TD
    A[Fill crate to nominal capacity] --> B[Drop twice from 1m height]
    B --> C[Inspect for visible failure]
    C --> D{Failure?}
    D -- Yes --> E[Reject crate]
    D -- No --> F[Crate passes test]

This ensures crates meet durability and handling standards per IS 7698.

IS 7698: Sampling and Criteria for Conformity

Sampling (Clause 7.3 & Table 3)

• Samples are drawn randomly per IS 4905-1968 (Clause 7.2.1).
• Sample size depends on lot size (Clause 7.3).

Performance Tests (Clause 7.4)

• For each performance test, 20 samples are drawn from a lot size of 1,000 or less.

Criteria for Conformity (Clause 7.5)

• Number of defective crates for any characteristic must not exceed permissible number in Table 3.
• No more than one crate should fail in each performance test.

Summary:

• Sampling size increases with lot size.
• Defects allowed are limited to ensure quality.
• Random sampling ensures unbiased inspection.

flowchart LR
    A[Lot Size] --> B{Sample Size}
    B -->|Up to 300| C[10 samples]
    B -->|301-500| D[15 samples]
    B -->|501-1000| E[20 samples]
    C & D & E --> F[Check defects ≤ permissible limit]
    F --> G{Performance Tests}
    G --> H[20 samples per test]
    H --> I[Max 1 failure allowed]
    I --> J[Lot Conforms if all conditions met]

IS 7698 - Marking & Sampling Key Points

Marking (Clause 8.1 & 8.1.1)

• Mark on central board of crate ends:
  • Name and trade-mark of fabricators
  • Date of fabrication
• Optional: ISI Certification Mark (subject to ISI rules, ensures compliance & quality control).

Sampling (Clause 7.3 & Table 3)

• Samples checked for material defects, dimensions, and construction.

Drop Test (Appendix B, Clause 6.2)

• Fill crate to nominal capacity with vegetables or equivalent.
• Drop twice from 1 m height on concrete.
• Check for visible failure immediately after.

flowchart TD
    A[Crate Fabrication] --> B[Marking on Central Board]
    B --> C[Name & Trade-mark]
    B --> D[Date of Fabrication]
    B --> E[ISI Mark (Optional)]
    A --> F[Sampling]
    F --> G[Check Material, Dimensions, Construction]
    G --> H[Accept/Reject based on Table 3]
    A --> I[Drop Test]
    I --> J[Fill to Nominal Capacity]
    J --> K[Drop Twice from 1m]
    K --> L[Inspect for Failures]

Summary: Mark crates clearly; sample per Table 3; conduct drop test as per Appendix B for quality assurance.

IS 7698: Dragging Test Method - Key Points & Specifications

Dragging Test Procedure (Clause 6.1, Appendix A)

• Filling: Crate filled to nominal capacity with vegetables or equivalent material simulating actual contents.
• Preparation: All wiring, stapling, etc., done as for regular transit.
• Test Surface: Level concrete or smooth rod.
• Dragging Distance: Drag crate horizontally 6 meters.
• Rotation: After dragging, rotate crate 90° on the same axis.
• Repeat: Drag back to initial position.
• Cycles: Repeat the above cycle 10 times.
• Inspection: Check immediately for visible damage that could spoil contents.

Important Specifications

Acceptance Criteria (Clause 6.1)

• No visible damage that might spoil the contents after the test.

Summary Diagram

flowchart LR
    A[Fill crate to nominal capacity] --> B[Prepare crate as for transit]
    B --> C[Place on level surface]
    C --> D[Drag 6 m horizontally]
    D --> E[Rotate crate 90°]
    E --> F[Drag back 6 m]
    F --> G{Repeat 10 times}
    G -->|Yes| D
    G -->|No| H[Inspect crate for damage]

This test ensures crates withstand handling stresses without damage, maintaining content integrity during transport.