bullies for general purposes

IS 3337: Scope Summary

• Scope: Covers requirements for ballies used for general purposes (Clause 1.1).
• Terminology: Harmonized with international standards and local practices (Clause 0.4).
• Rounding Off: Final test or analysis values must be rounded per IS 2-1960 rules, retaining the same significant figures as specified (Clause 6).

Key Points:

IS 2-1960 Rounding Rule (Summary):

• Round off to the same number of significant digits as the standard value.
• If the digit following the last retained digit is ≥5, increase the last digit by one.

flowchart LR
    A[Test/Analysis Value] --> B{Check digits after last significant digit}
    B -->|≥5| C[Round up last digit]
    B -->|<5| D[Retain last digit]
    C --> E[Final Rounded Value]
    D --> E

This ensures consistency and compliance with IS 3337 requirements.

IS 3337 - Definitions & Terminology Summary

• Reference Standards:
  Definitions in IS 3337 refer primarily to IS 707-1976 (Timber Terminology) and IS 2-1960 for rounding rules.

• Key Points:

  • Terms related to ballies (timber products for general use) follow IS 707-1976 definitions.
  • Numerical values must be rounded per IS 2-1960, maintaining the same significant figures as specified.
  • Clause 7.5 mentions size ranges (e.g., "Over 7.5 up to 11.5") likely referring to dimensions in mm or cm for timber sections.

• Rounding Rule (IS 2-1960):
  Round off final values to the same number of significant figures as the specified standard value.

Example: Rounding Off Values

Summary Table: Terminology Source

If you need specific definitions (e.g., ballies dimensions or properties), please specify!

IS 3337: Species of Timber - Key Details

1. Species Suitable for Ballies (Clause 3.1, Appendix A)

(Full list in Appendix A of IS 3337)

2. Abbreviated Symbols

• Each timber species has a 3-letter symbol for easy reference (e.g., ARJ for Arjun, TEA for Teak).

3. Definitions

• Spiral or Twisted Grain (Clause 2.1.8): Grain aligned spirally in the tree bole, affecting strength and workability.

4. Related IS Codes for Timber

• IS 190 (Coniferous sawn timber)
• IS 1141 (Seasoning of timber)
• IS 401 (Preservation of timber)
• IS 1150 (Trade names and symbols for timber species)
• IS 1708 (Testing small clear specimens)
• IS 2408 (Static tests of structural timber)

Summary Table: Timber Species & Symbols (Excerpt)

IS 3337: Preparation of Ballies - Key Specifications

1. Definition & Usage

• Ballies: Timber poles used in scaffolding, temporary structures, fencing, pile foundations, shuttering supports, and erosion control.
• Used in various sizes and species depending on application.

2. Dimensions (Clause 5.1)

3. Measurement (Clause 8.2)

• Diameter measured at extreme ends (top and butt).

4. Preservation

• Follow preservation methods as per IS for durability in service conditions.

Summary:

• Choose class based on diameter & length requirements.
• Ensure diameter measured correctly at ends.
• Use preserved timber for longevity.

flowchart LR
A[Ballies Selection] --> B{Class}
B --> C1[Class 1: 8.5-12.5 cm top, 15-20 cm butt]
B --> C2[Class 2: 6.5-8.5 cm top, 11.5-15 cm butt]
B --> C3[Class 3: 5-6.5 cm top, 7.5-11.5 cm butt]
C1 --> D[Length 3-9 m]
C2 --> D
C3 --> D
D --> E[Preservation as per IS]

For detailed preservation and handling, refer to IS 3337 full text.

IS 3337 - Ballies Dimensions (Clause 5.1)

Key Notes:

• Length ranges from 3 m to 9 m for all classes.
• Dimensions are diameter at top and diameter at butt end.
• Rounding off values must follow IS 2-1960 for consistency.
• Used for general purposes as per Clause 1.1.

Practical Application:

• Select ballies class based on required diameter and length.
• Ensure measurements comply with the above table unless otherwise specified.

flowchart TD
    A[Select Ballies Class] --> B{Diameter at Top?}
    B -->|>8.5 & ≤12.5| C[Class 1]
    B -->|>6.5 & ≤8.5| D[Class 2]
    B -->|>5 & ≤6.5| E[Class 3]
    C --> F[Check Butt Diameter >15 & ≤20]
    D --> G[Check Butt Diameter >11.5 & ≤15]
    E --> H[Check Butt Diameter >7.5 & ≤11.5]
    F & G & H --> I[Length 3 to 9 m]

This table and flowchart help in quick classification and selection of ballies per IS 3337.

IS 3337 - Key Requirements Summary

• Rounding Off (Clause 0.5):
  Final test or analysis values must be rounded per IS 2-1960 rules.

  • Retain the same number of significant figures as the specified value.
  • Ensures consistency and comparability of results.

• Scope (Clause 1.1):
  Applies to Ballies used for general purposes in timber technology.

• Terminology (Clause 0.4):
  Aligns with international standards and local practices for timber utilization.

Important Notes:

• Follow IS 2-1960 for rounding:

  Value to Round	Rounded Result (2 significant digits)
  3.14159	3.1
  0.00567	0.0057

• Ballies must meet general-purpose timber requirements as per IS 3337.

flowchart TD
    A[Test/Analysis Result] --> B[Round per IS 2-1960]
    B --> C[Compare with Specified Value]
    C --> D{Complies?}
    D -->|Yes| E[Accept]
    D -->|No| F[Reject]

This ensures standard compliance in timber testing and utilization.

IS 3337: Permissible Defects in Ballies (Wooden Poles)

Key Specifications:

• Straightness & Grain (Clause 6.2):

  • Ballies must be reasonably straight.
  • No cuts across the grain.
  • Free from live insect attack, rot, pronounced spiral/twisted grain.
  • No hollow heart or dead knots > 5 cm diameter.

• Surface Cracks (Clause 7.1):

  • Class I Ballies: Max depth = 20 mm, max width = 3 mm.
  • Class II & III Ballies: Max depth = 12 mm, max width = 3 mm.
  • Cracks should not be numerous or impair structural utility.

• Pin Holes (Dead Infestation) (Clause 7.6):

  • Scattered pin holes allowed.
  • Must not be concentrated or caused by powder post beetles.

Summary Table: Surface Crack Limits

Notes:

• Defects like hollow heart, live insect damage, and large knots reduce strength and durability.
• Regular inspection is essential to ensure defects remain within permissible limits.

flowchart TD
    A[Ballies Inspection] --> B{Check Defects}
    B --> C[Straightness & Grain]
    B --> D[Surface Cracks]
    B --> E[Pin Holes]
    C --> F{No cuts, rot, insect attack, knots >5cm}
    D --> G{Crack Depth & Width Limits}
    E --> H{Scattered, no powder post beetles}

IS 3337 - Measurements for Ballies (Wooden Poles)

Key Specifications (Clause 5.1)

Additional Notes:

• Rounding off: Final values (test or calculated) must be rounded as per IS 2-1960 to maintain the same number of significant digits as specified.
• Pin Holes (Clause 7.6): Dead infestations (pin holes) should be scattered, not concentrated, and must not be caused by powder post beetles.

Summary:

• Ballies are classified based on diameter at top and butt and length.
• Length ranges from 3 to 9 meters for all classes.
• Diameter at butt end is always significantly larger than at the top.
• Quality control includes infestation checks and adherence to rounding rules.

flowchart LR
    A[Ballies] --> B{Class}
    B --> C1[Class 1: D_top >8.5 to 12.5cm]
    B --> C2[Class 2: D_top >6.5 to 8.5cm]
    B --> C3[Class 3: D_top >5 to 6.5cm]
    C1 --> D1[Butt Diameter >15 to 20cm]
    C2 --> D2[Butt Diameter >11.5 to 15cm]
    C3 --> D3[Butt Diameter >7.5 to 11.5cm]
    D1 & D2 & D3 --> E[Length 3 to 9 m]

For detailed testing and rounding, refer to IS 2-1960.

IS 3337 – Marking of Ballies (Timber Poles)

Key Marking Requirements (Clause 10.1)

Each ballie shall be legibly and indelibly marked at 2 m from the butt end with:

• Species of timber (by symbol, see Appendix A)
• Class of ballie
• Supplier's name, initials, or registered trade-mark

Optional Marking (Clause 10.1.1)

• ISI Certification Mark may be added, indicating compliance with the standard and quality assurance under ISI supervision.

Appendix A: Species Symbols (Example)

Summary Diagram for Marking Location

graph LR
A[Butt End of Ballie] -->|2 m from butt| B[Marking Location]
B --> C[Species Symbol]
B --> D[Class]
B --> E[Supplier ID]
B --> F[ISI Mark (optional)]

Note: Markings must be durable and clear for inspection and traceability.

IS 3337: Certification and ISI Marking Key Points

• ISI Certification Mark: Indicates product compliance with IS 3337 under strict inspection, testing, and quality control supervised by ISI.
• Legal Framework: Use governed by the Indian Standards Institution (Certification Marks) Act and associated rules.
• Quality Assurance:
  • Products are manufactured per IS 3337 specifications.
  • Continuous ISI surveillance ensures ongoing conformity.
• Licensing: Manufacturers must obtain a license from ISI to use the ISI Mark; details available from ISI offices.

No specific formulas or tables are provided in IS 3337 related to certification or marking. The focus is on quality management and legal compliance.

Summary Table: ISI Marking Essentials

If you need structural or dimensional data from IS 3337, please specify!