Trade names and abbreviated symbols for timber species

IS 1150: Code for Structural Use of Timber - Scope Summary

• Scope (General): IS 1150 covers the design, construction, and use of timber in structural applications, including beams, columns, trusses, and other load-bearing members.

• Materials: Applies to seasoned timber, plywood, and other wood-based products used structurally.

• Abbreviated Symbols (Clause 2.1):

  • Use the first three letters of standard trade names for timber species or products.
  • Example: "SAL" for Sal wood, "DEO" for Deodar.

• Key Specifications:

  • Timber grading and quality requirements.
  • Allowable stresses for bending, compression, tension, and shear.
  • Moisture content limits and seasoning requirements.

• Typical Formulas:

  • Bending stress, (\sigma_b = \frac{M}{Z}), where (M) = bending moment, (Z) = section modulus.
  • Shear stress, (\tau = \frac{V}{A}), where (V) = shear force, (A) = shear area.

Example: Abbreviated Symbols Table (Extract)

If you need specific design formulas or tables (e.g., allowable stresses, section properties), please specify!

IS 1150: Rules for Abbreviated Symbols (Clauses 2.3, 2.5, 2.6)

• Clause 2.3:
  To avoid repetition when two or more timbers yield the same symbol:
  Use the 1st, 3rd, 4th, or subsequent letters of the timber name to form a unique abbreviated symbol.

• Clause 2.5:
  If repetition persists, transpose the 2nd or 3rd and any subsequent letters to create a distinct abbreviated symbol.

• Clause 2.6:
  Once an abbreviated symbol is standardized, it shall not be changed, except if the standard trade name itself is revised.

Summary Table

This ensures unique, consistent, and standardized timber symbols for clarity in documentation and communication.

IS 1150: Abbreviated Symbols - Key Points

• Rule 2.1:
  Abbreviated symbols are formed using the first three letters of the standard trade names.

• Rule 2.5:
  If repetition occurs, the symbol is modified by transposing the 2nd, 3rd, or subsequent letters to maintain uniqueness.

• Rule 2.6:
  Once standardized, abbreviated symbols must not be changed, unless the trade name itself is revised.

Summary Table of Rules:

This ensures clarity and consistency in symbol usage throughout IS 1150.

IS 1150: Trade Names and Abbreviated Symbols for Timber Species Grown in India

• The standard lists 288 timber species with trade names, botanical names, and abbreviated symbols.
• These are tabulated in Table 1 (native timbers) and Table 2 (imported timbers).
• Example entries from Table 1:

• The abbreviated symbols are 3-letter codes used for concise identification in design and documentation.
• Botanical names provide scientific precision for species identification.

Usage Tips:

• Refer to Annex A for botanical name indices.
• Use these symbols in structural timber specifications and procurement documents.
• For imported timbers, consult Table 2 in IS 1150.

flowchart LR
    A[Timber Species] --> B[Trade Name]
    A --> C[Botanical Name]
    A --> D[Abbreviated Symbol]
    B --> E[Example: Agarwood]
    C --> F[Example: Aquilaria agallocha Roxb.]
    D --> G[Example: AGA]

This standardized coding ensures clarity in timber identification across engineering, procurement, and construction.

IS 1150 - Trade Names & Abbreviated Symbols of Timber Species

IS 1150 provides standardized trade names and abbreviated symbols for timber species, including imported ones, facilitating uniform identification.

Key Points:

• Scope: Covers 288 Indian and 42 imported timber species.
• Tables:
  • Table 1: Trade names & symbols for Indian timbers.
  • Table 2: Trade names & symbols for imported timbers.
• Annexures: Botanical names indexed in Annex A (Indian) & Annex B (Imported).

Sample from Table 1 (Indian Timber Species):

Usage:

• Use abbreviated symbols for concise specification in design documents.
• Refer to Annexes for botanical verification.

flowchart TD
    A[IS 1150 Standard] --> B[Table 1: Indian Timbers]
    A --> C[Table 2: Imported Timbers]
    B --> D[Trade Names + Symbols]
    C --> E[Trade Names + Symbols]
    D --> F[Annex A: Botanical Names]
    E --> G[Annex B: Botanical Names]

For full lists, refer to IS 1150 official publication or Annexures for botanical indices.

IS 1150: Index of Botanical Names for Timber Species

• Scope: Lists 288 Indian and 42 imported timber species with trade names, botanical names, and abbreviated symbols.
• Reference Tables:
  • Table 1: Trade names, botanical names, and symbols of Indian timbers
  • Table 2: Imported timbers (not shown here)
  • Annex A & B: Index of botanical names

Key Specifications from Table 1 (Sample Extract)

Notes:

• Botanical names are cited with a single author name for accuracy.
• Double citation of botanical authors is discontinued.
• Author names can be omitted when reproducing names in specifications.
• Botanical names may be updated over time.

flowchart LR
    A[Trade Name] --> B[Botanical Name]
    B --> C[Abbreviated Symbol]
    C --> D[Used in Specifications]

Use this index for accurate timber identification and standardization in design and procurement per IS 1150.

IS 1150: Index of Botanical Names of Imported Timber Species

• Scope: Lists trade names, botanical names, and abbreviated symbols for 42 imported timber species (Annex B).
• Key Tables:
  • Table 1: 288 Indian-grown timber species with trade names, botanical names, and symbols.
  • Table 2: Imported timber species details (similar format).
• Botanical Name Index: Provided in Annex A (Indian species) and Annex B (imported species).
• Usage: Standardizes timber identification in trade and engineering applications.

Sample from Table 1 (Indian species):

Notes:

• Imported species follow the same format in Table 2.
• Abbreviated symbols are used for concise timber identification in design and specification.

For detailed species and symbols, refer to Annex B of IS 1150. This ensures uniformity in timber specification across projects.

flowchart LR
    A[Trade Names] --> B[Botanical Names]
    B --> C[Abbreviated Symbols]
    C --> D[Standardized Timber Identification]

IS 1150:2000 is prepared by the Timber Sectional Committee, CED 9 under the Civil Engineering Division Council.

Key Points:

• Committee Responsible: Timber Sectional Committee, CED 9
• Standard Revision: Third Revision, reaffirmed in 2005
• Role: The committee finalizes drafts and ensures technical accuracy for timber design and construction standards.

Note:

• IS 1150 covers Code of Practice for Structural Use of Timber.
• It includes formulas, tables, and specifications for timber properties, design stresses, and construction guidelines.
• For detailed formulas and tables, refer to the main body of IS 1150, not the committee section.

If you need formulas or tables related to timber design (like allowable stresses, section modulus, or load calculations), I can provide those separately.

IS 1150 does not explicitly provide formulas or tables under "Revisions and Amendments." However, the key points related to revisions are:

• Revisions are issued to update or reaffirm the standard (e.g., IS 1150:2000 reaffirmed in 2005).
• Clause 2.6: Once abbreviated symbols are standardized, they remain unchanged unless the trade name changes.
• Amendments typically clarify or update technical content without altering fundamental design principles.

General Practice for IS Code Revisions:

• Revisions maintain compatibility with earlier versions.
• Amendments may include updated material properties, load factors, or design methods.
• Always refer to the latest version for design.

For design-related formulas and tables, refer to specific clauses in IS 1150 (e.g., bending, shear, deflection).

flowchart LR
    A[Original IS 1150] --> B[Revision 2000]
    B --> C[Reaffirmed 2005]
    C --> D[Future Amendments]
    D --> E[Updated Symbols or Methods]

Summary: IS 1150 revisions focus on maintaining symbol consistency and updating technical content without changing core design rules.