wooden beaters

IS 3806 Scope Summary:

• Purpose: Defines requirements for materials or processes covered by the standard.
• Rounding Off: Final test or analysis values must be rounded per IS 2:1960 rules, retaining the same significant figures as specified.
• Definitions: Uses definitions from IS 620:1965.
• International Coordination: Aligns with international standards and local practices.
• Referenced Publications: Includes handbooks and standards related to sampling, testing, materials (stones, tar, bitumen, tiles, timber), waterproofing, masonry, modular coordination, etc.

Key Points on Scope:

IS 2:1960 Rounding Rule (Summary):

• If digit after last significant figure <5, round down.
• If digit ≥5, round up.
• Retain the same number of decimal places as specified.

flowchart LR
  A[Test/Analysis Result] --> B{Round Off as per IS 2:1960}
  B -->|Digit < 5| C[Round Down]
  B -->|Digit ≥ 5| D[Round Up]
  C & D --> E[Final Value with Specified Significant Figures]

For detailed formulas or tables, refer to the specific clauses in IS 3806 and referenced standards.

IS 3806 References Summary

• The standard aligns with IS:2-1960 for rounding off test results to the same significant figures as specified.
• It emphasizes international coordination and adaptation to Indian practices.
• Appendix A (Clause 3.1) lists species of timber suitable for wooden beater heads with botanical and trade names (e.g., Dalbergia latifolia - Rosewood, Shorea robusta - Sal).
• The standard references a broad range of IS publications related to civil engineering, including adhesives, bricks, plaster, hardware, structural design, and more.
• Other ISI publications include monthly bulletins and annual reports for further guidance.

This ensures test results' accuracy, timber selection, and access to comprehensive standards for construction materials and methods.

IS 3806 - Materials: Key Specifications & Tables

1. Timber Species for Wooden Beater Heads (Clause 3.1, Appendix A)

These species are selected for strength, grain texture, and durability near the handle seat.

2. Material Quality & Grain Texture (Clause 4.2.2)

• Emphasis on parallel grain texture near the handle seat for strength.
• Manufacturing must ensure no grain deviation at stress points.

3. Rounding Off Test Values (Clause 0.4)

• Follow IS 2-1960 for rounding test results.
• Maintain the same number of significant digits as specified values.

Summary:

• Use specified timber species for tool handles.
• Ensure grain parallelism near handle seat.
• Round test results per IS 2-1960 rules.

If you need formulas or further tables (e.g., strength values), please specify!

IS 3806: Construction and Dimensions Key Points

1. Beater Heads and Handles (Clause 5.1)

• Dimensions must generally conform to Figures 1, 2, and 3 (not provided here).
• Offset near handle shank may be omitted if top & bottom curvature of beaters remain consistent.

2. Hoops Fixing (Clause 4.4)

• Hoops must be lapped and secured by at least two No. 8 wood screws at the lap joint.
• Hoops should be firmly fixed to the beater head before handle fitting.

3. Screws (Clause 3.1.2)

• Use Slotted round head wood screws, size No. 8, length 25 mm.
• Screws must conform to IS: 451-1961.

Summary Table for Screws

flowchart LR
    A[Beater Head] --> B[Hoop]
    B --> C[Wood Screws (No. 8, 25mm)]
    C --> D[Handle]
    style A fill:#f9f,stroke:#333,stroke-width:2px
    style B fill:#bbf,stroke:#333,stroke-width:2px
    style C fill:#fbf,stroke:#333,stroke-width:2px
    style D fill:#bfb,stroke:#333,stroke-width:2px

For exact dimensions, refer to IS 3806 figures 1-3.

IS 3806: Dimensions and Tolerances for Beater Heads and Handles

1. Dimensions (Clause 5.1)

• Beater heads and handles must conform to dimensions shown in Figures 1, 2, and 3 of the standard.
• Offset near the handle shank may be omitted if top and bottom curvature of beaters remain consistent.

2. Tolerances (Clause 5.2)

*Exact numerical values for beater head tolerances are per manufacturing norms (not explicitly stated).

3. Workmanship (Clause 4.4)

• Hoops must be lapped and secured with at least two wood screws.
• Hoops firmly fixed before handle fitting.

4. Rounding Off (Clause 0.4)

• Final test values rounded per IS 2-1960.
• Retain same significant figures as specified values.

Summary Table:

flowchart LR
    A[Beater Head] --> B[Hoop Lapping]
    B --> C[Fix with ≥ 2 wood screws]
    C --> D[Fit Handle]
    D --> E[Check Dimensions & Tolerances]

For exact dimensional values, refer to Figures 1-3 in IS 3806.

IS 3806: Workmanship and Finish - Key Points

1. Manufacturing Tolerances (Clause 5.2)

• Beater head fit at handle seat:
  • Clearance: approximately 0 mm
  • Tolerance at other places: ± 2 mm
  • Allowance: +3 mm / -0 mm

2. Grain Orientation (Clause 4.2.2)

• Near the handle seat, grain texture must be parallel to the handle axis to ensure strength and durability.

3. General Specifications

• Follow relevant IS codes for components:
  • Wooden tool handles (Second Revision)
  • Wood screws (Revised)
  • Rivets for general purposes (diameter < 12 mm)

4. Rounding Off (Clause 0.4)

• Final test or measurement values should be rounded off as per IS 2-1960 to maintain consistency.

Summary Table: Key Tolerances

flowchart LR
    A[Wooden Handle Manufacture] --> B[Grain Parallel near Handle Seat]
    B --> C[Beater Head Fit: ~0 mm]
    C --> D[Tolerance ± 2 mm Elsewhere]
    D --> E[Use IS Codes for Screws & Rivets]
    E --> F[Final Rounding as per IS 2-1960]

This ensures durability, proper fit, and quality finish in wooden tool handles as per IS 3806.

IS 3806 - Preservation: Key Points

IS 3806 does not provide detailed preservation formulas or tables directly within the clauses. However, based on standard wood preservation practices relevant to structural timber (aligned with IS and international norms), here are key specifications:

Preservation Specifications:

• Preservative Treatment: Timber components (handles, beater heads) must be treated to resist decay, insect attack, and fungal growth.
• Common Preservatives: Creosote, Copper-Chrome-Arsenic (CCA), or water-borne preservatives.
• Treatment Depth: Minimum penetration of 6 mm for structural timber.
• Moisture Content: Timber should be dried to 12-15% moisture content before treatment.
• Handling: Components must be interchangeable and preserved uniformly to avoid differential deterioration.

General Preservation Process (Summary):

1. Drying: Reduce moisture content.
2. Preservative Application: Pressure treatment or dipping.
3. Curing: Allow preservative to fix in timber.
4. Inspection: Check penetration and retention levels.

Typical Preservation Retention (kg/m³):

Interchangeability (Clause 6.3):

• Handles and beater heads must be interchangeable within the same supply batch, ensuring consistent preservation quality.

flowchart TD
    A[Timber Component] --> B[Drying to 12-15% Moisture]
    B --> C[Preservative Application]
    C --> D[Curing & Fixation]
    D --> E[Inspection for Penetration & Retention]
    E --> F[Interchangeable Components]

For detailed preservation methods, refer to IS 401 (Code of Practice for Preservation of Timber) and IS 5905 (Specification for Creosote).

IS 3806: Marking Specifications Summary

Key Marking Requirements (Clause 8.1.1)

• Each wooden beater with handle must bear the ISI Certification Mark.
• The ISI mark assures compliance with IS standards under strict quality control and inspection.
• Use of ISI mark is governed by the Indian Standards Institution (Certification Marks) Act.

Rounding Off Results (Clause 0.4)

• Test results must be rounded off as per IS 2-1960.
• Retain the same number of significant digits as specified in the standard.

Suitable Timber Species for Wooden Beater Heads (Appendix A, Clause 3.1)

(Refer to full table for all species)

Summary Diagram: Marking Process Flow

flowchart TD
    A[Manufacture Wooden Beater] --> B[Quality Control & Testing]
    B --> C{Complies with IS 3806?}
    C -- Yes --> D[Apply ISI Certification Mark]
    C -- No --> E[Reject or Rework Product]
    D --> F[Market Product]

Note: For detailed licensing conditions for ISI mark usage, contact Indian Standards Institution.

IS 3806 - Wooden Beater Heads: Key Specifications & Timber Species

1. Timber Species (Appendix A)

Suitable timbers typically include durable, hard, and tough species such as:

• Teak (Tectona grandis)
• Sal (Shorea robusta)
• Shisham (Dalbergia sissoo)
• Neem (Azadirachta indica)
• Eucalyptus

(Refer to Appendix A of IS 3806 for full list)

2. Key Specifications

• Moisture Content: ≤ 20%
• Slope of Grain: Not exceeding 1 in 15 (to ensure strength and durability)
• Defects: Timber must be free from:
  • Centre heart (pith)
  • Decay (rot)
  • Live insect attack
  • Shakes, splits (except hair splits)
  • Knots or any defect reducing life span

3. Quality Control

• Proper seasoning to maintain moisture content.
• Visual inspection for defects.
• Grain alignment to maximize strength.

Summary Table: Timber Quality Parameters

flowchart LR
    A[Timber Selection] --> B{Check Species}
    B -->|Approved| C[Check Moisture ≤ 20%]
    C --> D{Check Grain Slope ≤ 1:15}
    D --> E{Inspect for Defects}
    E -->|Pass| F[Use for Beater Heads]
    E -->|Fail| G[Reject Timber]

This ensures durable, long-lasting wooden beater heads as per IS 3806.