wooden boxes for packaging apples

IS 3728: Scope - Key Specifications & Tables

• Scope: Defines packing cases for various contents, specifying sizes, styles, and tolerances.

1. Packing Case Sizes & Styles (Clause 4.2, Table 1)

2. Dimensional Tolerances (Clause 4.2.1 & 4.3.1)

• Internal dimensions: ±5 mm tolerance
• Thickness of boards & battens: +2 mm / -1 mm
• Width of battens: ±2 mm

These ensure uniformity and compatibility in packing case manufacturing and usage as per IS 3728.

IS 3728: Definitions & Key Specifications for Packing Cases

Definitions (Clause 2.0)

• Uses additional definitions from:
  • IS 707-1976 (Mild steel wire)
  • IS 6703-1972 (Hot rolled steel strips)
• These provide material specifications relevant to packing cases.

Sizes & Styles (Clause 4.2 & Table 1)

• Packing cases are categorized by approximate content mass (kg) and style.
• Internal dimensions are given in cm (Length × Width × Height).
• Tolerance: ±5 mm on internal dimensions allowed (Clause 4.2.1).

Notes:

• Sizes other than those listed must be mutually agreed upon.
• Styles indicate box construction types; refer to IS 3728 for detailed style descriptions.

flowchart TD
    A[Content Mass (kg)] --> B[Select Style]
    B --> C[Determine Internal Dimensions]
    C --> D[Apply ±5 mm Tolerance]
    D --> E[Finalize Packing Case Size]

This summary aids in selecting standardized packing case sizes per IS 3728.

IS 3728 - Materials: Key Specifications and Tables

1. Tolerance on Dimensions (Clause 4.2.1)

• Permissible tolerance on overall internal dimensions of packing cases:
  ±5 mm

2. Materials Specifications

• Mild steel wire for general engineering: per relevant IS standards (e.g., IS 280-1978, IS 1029-1970, IS 5872-1975).
• Hot rolled steel strips (baling) and cold rolled steel strips (box strappings) as per their respective IS revisions.

3. Packing Case Sizes and Styles (Clause 4.2, Table 1)

4. Binding Materials (Clause 3.2.2)

• Use mild steel wire or metal straps complying with IS 280, IS 1029, or IS 5872.

Summary:

• Tolerance: ±5 mm on internal dimensions.
• Materials: Mild steel wire/strapping per IS standards.
• Sizes: Refer Table 1 for preferred dimensions linked to content mass and style.
• Binding: Mild steel wire or metal straps.

flowchart LR
    A[Material Selection] --> B[Mild Steel Wire (IS 280

IS 3728: Styles and Sizes of Packing Cases

1. Preferred Sizes (Clause 4.2, Table 1)

Note: Sizes outside this table require purchaser-supplier agreement.

2. Board and Batten Dimensions (Clause 4.3)

3. Permissible Tolerances (Clause 4.3.1)

4. Additional Notes

• Mild steel wire or metal straps per IS 280, IS 1029, or IS 5872 may be used for binding (Clause 3.2.2).

flowchart LR
    A[Packing Case] --> B[Style 1]
    A --> C[Style 2 (A, B, C)]
    B --> D{Mass 5-10 kg}
    C --> E{Mass 14-20 kg}
    D --> F[Dimensions per Table 

IS 3728: Construction and Design Key Specifications

1. Packing Case Sizes & Styles (Clause 4.2, Table 1)

Note: Sizes other than these require purchaser-supplier agreement.

2. Board and Batten Thickness & Width (Clause 4.3, 4.3.1)

Summary:

• Internal dimensions and styles define packing case design based on content mass.
• Thickness and width tolerances ensure consistent material quality.
• Follow these for standard construction of wooden packing cases per IS 3728.

flowchart TD
    A[Content Mass] --> B[Select Style & Size]
    B --> C[Internal Dimensions]
    C --> D[Board & Batten Thickness]
    D --> E[Apply Tolerances]
    E --> F[Construct Packing Case]

For detailed design, refer to IS 3728 clauses 4.2 and 4.

IS 3728: Workmanship and Finish - Key Points

1. Tolerances (Clause 4.3.1)

2. Board and Batten Quality (Clause 6.1)

• Boards and battens must be even thickness, reasonably smooth.
• Ends must be trimmed square for proper assembly.

3. Style 2 (C) Assembly (Clause 5.5)

• End, side, top, and bottom boards may be made of max two pieces.
• Boards nailed to ends; side boards also nailed to vertical end battens.
• Vertical end battens flush with outer surfaces of top/bottom boards.
• Ends of side boards flush with outer surfaces of end battens.

4. Material Specifications

• Mild steel wire, hot-rolled steel strips, and cold-rolled steel strips as per relevant IS specifications.

Visual: Style 2 (C) Assembly (Fig. 4)

graph LR
  TopBoard[Top Board]
  BottomBoard[Bottom Board]
  SideBoard[Side Board]
  EndBatten[Vertical End Batten]

  TopBoard ---|Nailed| EndBatten
  BottomBoard ---|Nailed| EndBatten
  SideBoard ---|Nailed to ends| EndBatten
  SideBoard ---|Nailed to sides| EndBatten

  EndBatten -. flush with .-> TopBoard
  EndBatten -. flush with .-> BottomBoard
  SideBoard -. flush with .-> EndBatten

Summary: Ensure tolerances are within limits, smooth and square finishes, and proper nailing with flush surfaces for Style 2 (C) cases.

IS 3728: Delivery Conditions – Key Specifications

1. Preferred Sizes & Styles (Clause 4.2, Table 1)

2. Tolerance (Clause 4.2.1)

• ±5 mm permissible on overall internal dimensions.

3. Material Specifications

• Mild steel wire: As per relevant IS for general engineering.
• Hot rolled steel strips (baling) and cold rolled steel strips (box strappings) as per their respective IS standards.

Summary:
Packing cases must conform to the above internal sizes based on content mass, with a ±5 mm tolerance. Material quality follows IS standards for steel wires and strips used in packing.

flowchart TD
    A[Content Mass (kg)] --> B[Select Style (1, 2A, 2B, 2C)]
    B --> C[Determine Internal Dimensions (L×W×H)]
    C --> D[Apply ±5 mm tolerance]
    D --> E[Material as per IS specs]

IS 3728 - Marking of Packing Cases

Clause 8.1: Mandatory Marking on Cases
Each assembled case or bundle shall be legibly and indelibly marked with:

• Manufacturer's name/initials/trade-mark
• Year of manufacture
• Size and style of the packing case

Clause 8.2: ISI Certification Mark

• Cases may bear the ISI Certification Mark.
• ISI Mark assures compliance with the standard, backed by ISI inspection and quality control.

Table 1: Preferred Sizes and Styles of Packing Cases (Internal Dimensions)

Additional Specifications

• Tolerance on internal dimensions: ±5 mm (Clause 4.2.1)
• Use of ISI Mark governed by Indian Standards Institution (Certification Marks) Act.

flowchart TD
    A[Packing Case] --> B{Marking}
    B --> C[Manufacturer's Name/Trademark]
    B --> D[Year of Manufacture]
    B --> E[Size & Style]
    B --> F[ISI Certification Mark (optional)]

For detailed licensing and ISI mark usage, contact ISI offices listed in the code.