rebound wooden boxes

IS 8725: Scope - Key Specifications & Tables

The code covers design and construction of wirebound wooden boxes for packing, focusing on:

1. Mass of Contents & Wood Group (Clause 5.1)

Values represent thickness or dimension based on load difficulty.

2. Minimum Number & Diameter of Girth Wires (Clause 5.3.2)

IS 8725: Terminology and Definitions - Key Points

• Clause 2.1: Definitions supplement those in IS 707-1976 and IS 6703-1972, covering timber and wooden packaging terms.
• Clause 2.1.3 (Nomenclature):
  The parts of wire-bound wooden boxes are identified as per Fig. 1, including:
  • Intermediate Cleat
  • Battens
  • Girth wires
  • Liners, etc.

Key Table: Minimum Number and Diameter of Girth Wires (Clause 5.3.2)

(Refer to the full Table 5.2.1 in IS 8725 for complete details)

Typical Components (Fig. 1 Nomenclature)

graph LR
  A[Wire-bound Wooden Box] --> B[Intermediate Cleat]
  A --> C[Battens]
  A --> D[Girth Wires]
  A --> E[Liners]
  A --> F[Ends (Battened or Lined)]

Summary:
IS 8725 defines terminology based on timber and packaging standards, specifies nomenclature for box parts, and provides detailed tables for girth wire sizing relative to box size and content mass. Use these for designing wire-bound wooden boxes per standard.

IS 8725: Materials - Key Formulas, Tables & Specifications

1. Planks (Clause 5.1)

• Planks must conform to IS 6662-1972.
• Thickness depends on mass of contents and load type (Easy, Average, Difficult).
• Thickness values (in mm) vary by wood group (I, II, III).

2. Girth Wires (Clause 5.3.2)

• Minimum number and diameter depend on mass of contents and **inside length of box

IS 8725: Types and Styles of Wirebound Wooden Boxes

Key Styles (Clause 4.1 & 5.4.1)

End Construction (Clause 5.4.1)

• Plain Ends: Used only with plywood.
• Battened Ends: Reinforced with battens applied in various ways (see Fig. 6).
• Liners: For rotary cut or resawn lumber, liners are stapled inside edges with grain perpendicular to end boards (see Fig. 7).

Summary Diagram of Styles

graph TD
    A[Style A] -->|Twist wire closure| EndsA[Nailed-in ends]
    B[Style B] -->|Plain or battened ends| EndsB[Reinforced ends]
    C[Style C] -->|Plain or battened ends| EndsC[Battens as per Fig.6]
    D[Style D] -->|Rock Fastener loops| EndsD[Nail-less wired ends]

    EndsA -->|Pilfer-proof| FeaturesA
    EndsD -->|Fastest assembly| FeaturesD

Note: Refer to IS 8725 Figures 2-7 for detailed construction and reinforcement layouts.

IS 8725: Key Construction Specifications

1. Planks (Clause 5.1)

• Planks must conform to IS: 6662-1972.
• Thickness depends on mass of contents and load type (Easy, Average, Difficult).
• Thickness values (in mm) vary by wood group (I, II, III) and load difficulty, e.g.:

2. Girth Wires (Clause 5.3.2)

• Number and diameter depend on mass of contents and inside length of box.
• Example for mass up to 35 kg, inside length up to 200 mm: 2 wires of 1.8 mm diameter.
• For larger boxes and heavier contents, number and size increase, e.g., for 150-250 kg and 400-575 mm length: 6 wires of 2.5 mm diameter.

3. Cleats

• Size and number depend on plank thickness and box size (refer to Clause 5.3.2 Table 5.2.1).

Summary Diagram of Construction Elements

graph TD
A[Mass of Contents] --> B[Plank Thickness (IS 6662)]
A --> C[Girth Wire Number & Diameter]
B --> D[Wood Group & Load Type]
C --> E[Inside Length of Box]
D --> F[Easy/Average/Difficult Load]
E --> G[Wire Size & Count]

Use these tables and clauses for designing wirebound wooden boxes per IS 8725.

Key Specifications & Tables for Nailing and Fastening (IS 8725):

1. Nails

• Use plane head nails conforming to IS: 723-1972.
• Suitable length nails must be used for assembling wooden boxes (Clause 3.2).

2. Cleats - Maximum Distance Between Adjacent Rows (Clause 5.2.1.2)

3. Girth Wires - Minimum Number and Diameter (Clause 5.3.2)

IS 8725 - Preservative Treatment Key Points

1. Preservative Treatment (Clause 7.1)

• Mats and ends shall be treated as necessary.
• Treatment should conform to IS 401:1967 (Code of Practice for Preservation of Timber).
• Treatment type and extent agreed between purchaser and manufacturer.

2. Nails Clinching (Clause 6.2)

• Nails must be well clinched along the grain of timber for proper fixing.

3. Mass of Contents & Dimensions (Clause 5.1 Table Extract)

• Dimensions depend on mass of contents and wood group (I, II, III).
• For example, for Group I wood with mass up to 35 kg:
  • Easy Load: 3.5 mm thickness
  • Average Load: 3.5 mm
  • Difficult Load: 4.0 mm

(Refer IS 8725 Table 5.1 for full details)

Summary:

• Preservative treatment per IS 401:1967.
• Nails clinched along grain.
• Thickness and dimensions vary with wood group and load; refer to IS 8725 Table 5.1.
• Boxes usually delivered as shooks tied in bundles (Clause 8.1).

flowchart TD
    A[Wood Mats & Ends] --> B[Preservative Treatment]
    B --> C{Agree Treatment Type}
    C -->|Yes| D[IS 401:1967 Standard]
    C -->|No

IS 8725 - Packaging and Delivery: Key Points

IS 8725 refers to packaging guidelines referencing BS 1133: Section 8 (1950) for wooden containers.

Load Classification for Packaging:

• Easy Load: Light, non-fragile items requiring minimal support.
• Average Load (Clause 3.1):
  • Moderately dense items.
  • Requires moderate protection.
  • Items may be packed directly or with intermediate packaging.
  • Examples: metal cans, cushioned bottles, hardware.
  • Packages provide moderate support to container faces.
• Difficult Load:
  • Heavy, fragile, or irregular items.
  • Requires robust container design.
  • Physical attributes like weight, fragility, shape influence container design.

Packaging Design Factors (Clause 1.1):

• Weight
• Size
• Fragility
• Shape
• Support capacity

Specifications:

• Wooden containers must be designed based on load category.
• Intermediate packaging may be used to support container faces.
• Protection level varies with load type.

Summary Table: Load Types and Packaging Needs

For detailed container design, refer to BS 1133 Section 8 for wooden container dimensions and construction.

flowchart LR
    A[Load Attributes] --> B{Load Category}
    B --> C[Easy Load]
    B --> D[Average Load]
    B --> E[Difficult Load]
    C --> F[Minimal Packaging]
    D --> G[Moderate Packaging]
    E --> H[Robust Packaging]

This classification guides packaging design ensuring safe delivery.

IS 8725: Marking and Packaging Specifications

Clause 9.1: Marking Requirements

Each assembled case or bundle must be legibly and indelibly marked or stapled with:

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

Clause 5.1: Mass of Contents (Table Summary)

Dimensions refer to thickness or size of packaging components.

Clause 5.3.2: Minimum Number and Diameter of Girth Wires

IS 8725: Additional Construction Details - Key Formulas, Tables & Specs

1. Plank Thickness (Clause 5.1)

• Planks must conform to IS 6662-1972.
• Thickness depends on mass of contents and load type (Easy, Average, Difficult).

2. Maximum Distance Between Cleat Rows (Clause 5.2.1.2)