battened plywood cases

IS 2674 - Scope: Key Specifications & Tables

1. Scope Overview (Clause 4.3)

• Plywood case styles depend on:
  • Mass & nature of contents
  • Type of load (Easy, Average, Difficult; see Appendix A)
  • Handling & transportation modes
• Mass & load type are primary factors.

2. Internal Dimensions of Plywood Cases (Table 1)

• Length ≤ 2.5 × width or depth

3. Styles & Construction (Table 2)

IS 2674: Terminology & Key Specifications for Plywood Cases

Terminology (Clause 2)

• Definitions follow:
  • IS 707-1976: Timber technology terms
  • IS 6703-1972: Wooden packaging terms

Key Tables & Formulas

Table 1: Internal Dimensions (cm)

Length ≤ 2.5 × Width or Depth

Table 2: Styles & Construction by Mass of Contents

Table 3: Nail/Staple Spacing (cm center-to-center)

IS 2674: Key Formulas, Tables, and Specifications for Materials (Plywood Cases)

1. Internal Dimensions of Plywood Cases (Table 1)

• Cross-section sizes (cm × cm): 20×20, 30×30, 40×40, 50×50
• Length limited to max 2.5 × width or depth

2. Styles and Construction (Table 2)

• Plywood thickness and batten size depend on mass of contents and load type (Easy, Average, Difficult).

3. Nails and Staples Spacing (Table 3)

IS 2674: Styles, Sizes and Construction of Plywood Cases

1. Styles & Mass of Contents (Table 2)

2. Internal Dimensions (Table 1)

• Cross sections: 20×20, 30×30, 40×40, 50×50 cm
• Length max = 2.5 × width or depth

3. Fastening Details

• Staples: steel wire ≥ 0.9 mm dia
• Crown length ≥ plywood thickness + batten thickness + 3 mm
• Nails/staples spacing (Table 3):

4. Nail Sizes for Assembly (Table 4)

| Batten Width (mm) | Thickness (mm) | Nail Length (mm) | Nail Dia (mm) | |-------------------|----------------|----------------

IS 2674: Workmanship and Finish - Key Specifications

1. Nail Sizes for Assembling Cases (Clause 4.5.2, Table 4)

2. Spacing of Nails and Staples (Table 3)

• Nails/staples must be staggered in two parallel rows.
• Minimum 10 mm spacing between rows and from edges.
• Minimum 25 mm from ends of battens.

3. Staples (Clause 3.4)

• Steel wire diameter ≥ 0.90 mm.
• Crown length ≥ plywood thickness + batten thickness + 3 mm.

4. Plywood Case Construction (Table 2)

5. **Length

IS 2674: Assembly and Delivery of Plywood Cases

1. Styles & Construction (Table 2)

2. Nail/Staple Spacing (Table 3)

3. Nail Sizes for Assembly (Table 4)

4. Other Key Points

• Length of case ≤ 2.5 × width or depth.
• Nails/staples fixed in two staggered rows, ≥10 mm apart, ≥10 mm from edges, ≥25 mm from ends.
• Load types affect construction:
  • Easy load: Contents

IS 2674: Key Marking and Plywood Case Specifications

Marking (Clause 7.1 & 7.2)

Each plywood case must be legibly and indelibly marked with:

• Manufacturer's name/initials/trade-mark
• Year of manufacture
• Style and size

Standard marking details are governed by the Bureau of Indian Standards.

Plywood Case Dimensions & Styles (Clause 4.3)

Length ≤ 2.5 × width or depth

Styles & Construction (Table 2)

Nail & Staple Spacing (Table 3)

| Max Mass (kg) | Easy & Average Load (cm) | Difficult Load (cm) | |---------------|

IS 2674: Bundling & Packaging of Unassembled Cases

Key Specifications (Clause 6.2 & 6.2.1)

• Bundles must be tied with string or iron hoops for safe carriage.
• Maximum bundle mass: 40 kg.
• Each bundle contains only one type of component (all sides, or all ends, etc.).

Plywood Case Dimensions (Table 1)

• Cross-section sizes: 20×20 cm to 50×50 cm.
• Length max: 2.5 × width or depth.

Styles & Construction (Table 2)

Nail/Staple Spacing (Table 3)

Load Classification (Clause 4.1)

• Difficult load: Concentrated forces, delicate or free-shifting items requiring bracing.
• Easy/Average loads are less demanding on case strength.

flowchart TD
    A[Unassembled Components] --> B[Bundling]
    B --> C{Mass ≤ 40 kg?}
    C -- Yes --> D[Bundle with string or iron hoop]

IS 2674: Types of Loads and Load Classification

Load Types (Clause 4.3 & Appendix A)

Key Specifications:

• Easy Load: Contents provide uniform support; minimal internal bracing needed.
• Average Load: Moderate support from contents or packaging; some cushioning.
• Difficult Load: Contents exert concentrated forces; require bracing, bolting, and careful packing.

Notes:

• The section of battens (thickness × width) is rounded to nearest metric size without strength loss.
• Tables 2, 3, and 4 (not provided here) give detailed manufacturing dimensions and strength criteria updated to current practices.

flowchart TD
    A[Load Types] --> B[Easy Load]
    A --> C[Average Load]
    A --> D[Difficult Load]

    B --> E[Low to moderate density]
    B --> F[Fully support packing case faces]

    C --> G[Moderate density]
    C --> H[Partial support from contents or packaging]

    D --> I[Highly concentrated forces]
    D --> J[No support to packing case faces]
    D --> K[Require bracing and bolting]

This classification guides packing design, ensuring proper protection and strength per load type.