rebound wooden crates

IS 8726: Scope Overview

IS 8726 covers specifications for wirebound crates used for packaging, focusing on construction, materials, and styles suitable for various products.

Key Points from Scope (Clause 2.1 & related):

• Applies to wirebound crates as per definitions in IS 707-1976 (timber species) and IS 6703-1972 (steel nails).
• Includes Style A (Fig. 1) and Style B (Fig. 2) crates:
  • Style A: Wirebound crates with intermediate slats.
  • Style B: Upright or wrap-around crates, suitable for appliances, motors, transformers.
• Items are secured by bolting or blocking with structural members to intermediate cleats.

Material Specifications:

Construction Notes:

• Crates must ensure secure packaging with wire binding and proper fastening.
• Style B crates allow blocking or bolting to intermediate cleats for stability.

graph TD
    A[Wirebound Crates IS 8726] --> B[Style A: Wirebound with Slats]
    A --> C[Style B: Upright Wrap-around Crate]
    C --> D[Suitable for appliances, motors, transformers]
    D --> E[Item bolted or blocked to cleats]

For detailed dimensions and construction, refer to figures and clauses in the standard.

IS 8726: Definitions Summary

• Scope: Defines terms for wooden and wirebound crates used for packing appliances, motors, transformers, etc.
• Reference Standards:
  • IS 707-1976: Timber species suitable for packaging.
  • IS 6703-1972: Steel countersunk head wire nails.
  • Additional specs for mild steel wire and wirebound wooden boxes.

Key Definitions (from IS 8726 & referenced IS codes):

Important Notes:

• Style B crates are preferred for heavy or delicate items requiring bolting/blocking.
• Construction and materials must comply with referenced IS standards for timber, nails, and wire.
• The standard adapts concepts from JIS Z 1408-1960 for wirebound crates.

Visual Illustration (Simplified):

graph TD
  A[Style A Crate] -->|Wirebound| B[Intermediate Slats]
  C[Style B Crate] -->|Wrap-around| D[Bolted/Blocked Item]

For detailed construction and material specs, refer to IS 707, IS 6703, and IS 8726 clauses on packaging materials.

IS 8726: Materials - Key Specifications

IS 8726 references other IS codes for materials used in wirebound crates:

• Timber: As per IS 707-1976, specifies suitable timber species for wooden packaging.
• Nails: Steel countersunk head wire nails as per IS 6703-1972.
• Wire: Mild steel wire for general engineering purposes, conforming to relevant IS standards (likely IS 280-1978 or similar).

Important Material Notes:

• Timber: Should be durable, free from defects, and suitable for structural strength.
• Wire: Typically mild steel wire with adequate tensile strength for binding.
• Nails: Steel wire nails with countersunk heads for secure fastening.

Typical Material Properties (General Reference):

Construction Note:

• Style B crates (upright/wrap-around) use structural members fastened to intermediate cleats for blocking items.

flowchart LR
  Timber -->|IS 707| WireboundCrate
  Nails -->|IS 6703| WireboundCrate
  Wire -->|Mild Steel| WireboundCrate
  WireboundCrate --> StyleA
  WireboundCrate --> StyleB

For detailed design, refer to the specific IS codes mentioned for material properties and quality.

IS 8726 - Design Styles for Wirebound Crates

Key Design Styles

• Style A (Fig. 1): Wirebound crate with intermediate slats, primarily for distortion resistance.
• Style B (Fig. 2): Upright or wrap-around crate, suitable for appliances, motors, transformers.
  • Item is either bolted to the base or blocked by structural members fastened to intermediate cleats.

Construction Highlights

• Bases (Clause 5.1 & Fig. 3): Base style depends on:

  • Product weight
  • Fastening method to base
  • Handling requirements (may include pallet/skid base)

• Intermediate Slats (Clause 5.3.2):

  • Positioned near 45° angle to maximize distortion resistance.
  • Effectiveness depends on width-to-length ratio.

Specifications Referenced

• Timber species suitable for packaging.
• Steel countersunk head wire nails.
• Mild steel wire for general engineering.
• Wirebound wooden boxes.

Important Notes:

• Slat angle ≈ 45° for max rigidity.
• Base design tailored to product and handling method.
• Style B is ideal for heavy, sensitive equipment requiring secure fastening.

flowchart LR
    A[Product Type] --> B{Select Style}
    B -->|Appliances, Motors| C[Style B - Upright Crate]
    B -->|General| D[Style A - Wirebound Crate]
    C --> E[Base Design (Fig.3)]
    E --> F[Fastening: Bolted or Blocked]
    D --> G[Intermediate Slats @ 45°]
    G --> H[Distortion Resistance]

This summary aids in selecting appropriate crate style and construction per IS 8726.

IS 8726: Key Construction Specifications for Wirebound Crates

• Crate Types (Clause 4.1.2):

  • Style A: Wirebound crate with intermediate slats (Fig. 1).
  • Style B: Upright "wrap-around" or "hood" crate (Fig. 2), suitable for appliances, motors, transformers.
    • Item is either bolted to base or blocked by structural members fastened to intermediate cleats.

• Materials:

  • Timber species as per IS 707-1976.
  • Steel countersunk head wire nails as per IS 6703-1972.
  • Mild steel wire as per relevant IS standards.

• Tops (Clause 5.2):

  • Tops conform to types shown in Fig. 4.
  • Construction may be by staples or nails.

Typical Construction Notes:

• Use intermediate slats for strength.
• Fasten structural members securely for blocking.
• Choose crate style based on product type and handling.

Simplified Construction Flow:

flowchart TD
    A[Select Crate Style] --> B{Style A or B}
    B -->|Style A| C[Use wirebound crate with intermediate slats]
    B -->|Style B| D[Use upright wrap-around crate]
    C --> E[Fasten item to base or block with structural members]
    D --> E
    E --> F[Construct top with staples or nails as per Fig.4]

For detailed dimensions and nail/wire sizes, refer to IS 707 and IS 6703.

IS 8726: Workmanship and Finish Key Points

1. Workmanship (Clause 6.1)

• Materials: Boards, battens, liners, slats must have:
  • Even thickness
  • Rectangular cross-section
  • Square, trimmed ends
  • Smooth surface finish (reasonably smooth, no rough edges)

2. Intermediate Slats (Clause 5.3.2)

• Slats arranged near 45° angle to resist distortion effectively.
• Effectiveness depends on width-to-length ratio of the slats.
• Provide structural stability and simplify manufacture.

3. Specifications Referenced

• Timber species suitable for wooden packaging.
• Steel countersunk head wire nails.
• Mild steel wire for general engineering.
• Wirebound wooden boxes.

Summary Table: Slat Arrangement

flowchart LR
    A[Boards, Battens, Slats] --> B[Even Thickness]
    A --> C[Rectangular Section]
    A --> D[Square Trimmed Ends]
    A --> E[Smooth Finish]
    F[Intermediate Slats] --> G[45° Angle Arrangement]
    G --> H[Max Distortion Resistance]
    G --> I[Depends on Width/Length Ratio]

This ensures durable, stable, and manufacturable wirebound crates per IS 8726.

IS 8726 - Marking Requirements (Clause 9.1)

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

• Manufacturer's name, initials, or trade-mark
• Year of manufacture
• Number and size of the package

Key Points:

• Marking ensures traceability and quality control.
• Marking must be clear to avoid confusion during handling and storage.
• Timber must be free from objectionable markings (Clause 3.1.3).

Typical Marking Format Example:

This marking system aligns with international practices like JIS Z 1408-1960 for wirebound crates, ensuring standardization.

flowchart LR
    A[Assembled Case/Bundle] --> B[Marking]
    B --> C[Manufacturer's Name/Trademark]
    B --> D[Year of Manufacture]
    B --> E[Number & Size]

IS 8726 - Applications and Usage: Key Points

• Applications:

  • Style B wirebound crates (Clause 4.1.2) are ideal for packing appliances, motors, transformers, and similar products.
  • Items are secured by bolting to the base or blocking with structural members fastened to intermediate cleats.

• Specifications:

  • Timber species must comply with IS 707-1976 (timber for packaging).
  • Nails must conform to IS 6703-1972 (steel countersunk head wire nails).
  • Wire used should meet mild steel wire standards for general engineering (second revision).

• Construction:

  • Style A and B crates differ in form: Style A is a wirebound crate with intermediate slats; Style B is an upright wrap-around crate (Fig. 1 & 2).
  • Crates follow guidance similar to JIS Z 1408-1960 for wirebound crates.

Typical Usage Summary:

flowchart LR
    A[Item to be packed]
    B[Style B Crate]
    C[Bolted to base]
    D[Blocked by structural members]
    A --> B
    B --> C
    B --> D

This ensures secure packaging for heavy or sensitive equipment per IS 8726.