wooden wardrobes (Adjustable and non-adjustable type) - Specification

IS 4126 - Scope Summary & Key Specifications

• Scope: Covers dimensions, construction, finishing, and marking of wooden wardrobes.

• Dimensions & Tolerances (Clause 4.2):
  Overall dimensions shall not vary by more than ±5 mm.

• Finishing (Clause 3.9):
  Paints, enamels, varnishes must conform to IS 2338 (Part 2)-1967.

• Marking (Clause 12.2):
  Products labeled with ECO Mark must meet specified environmental criteria.

• Purchaser's Information (Annex A-1):

  • Lock type
  • Locker requirement
  • Number/type of shelves
  • Finish color
  • Alternative construction/finish methods if any

• Units:
  Uses SI units for all measurements (e.g., length in meters, force in newtons).

Tolerance Specification Table (Extract)

Key Units & Symbols (SI)

flowchart LR
  A[Order Placement] --> B[Provide Info: Lock, Shelves, Finish]
  B --> C[Manufacturing as per IS 4126]
  C --> D[Apply Finishing per IS 2338]
  D --> E[Marking & ECO Labeling]
  E --> F[Delivery]

This concise scope ensures wardrobe manufacturing meets dimensional accuracy, finish quality, and purchaser requirements per IS 4126.

IS 4126: Wooden Wardrobes - Key Specifications

Types of Wooden Wardrobes (Clause 2.1)

• a) General Purpose: Surface painted or stained and polished.
• b) Decorative Veneered: Decorative veneered and polished surface (Clause 3.2.1 specifies veneered particle board per IS 3097-1980, usually figured teak veneer).

Materials (Clause 3.2.1)

• Decorative veneered particle board for doors and sides.
• Timber facing as specified (e.g., figured teak).

Dimensions & Tolerances (Clause 4.1)

Notes:

• Wardrobes have hinged doors.
• Clearances ensure easy fitting in recesses.

graph TD
A[Wooden Wardrobes] --> B[General Purpose]
A --> C[Decorative Veneered]
C --> D[Particle Board (IS 3097)]
D --> E[Figured Teak Veneer]

F[Dimensions]
F --> G[Height: 1980 mm]
F --> H[Width: 990 mm]
F --> I[Depth: 610 mm]

J[Clearances for Recess]
J --> K[Top: 20 mm]
J --> L[Sides: 10 mm each]
J --> M[Depth: 5 mm]

This summarizes the key types, materials, and dimensional specs for wooden wardrobes per IS 4126.

IS 4126: Materials - Key Specifications & References

• Paint, Enamel, Varnish: Must comply with IS 2338 (Part 2)-1967 (Clause 3.9). This standard specifies types and schedules for finishing materials.

• Plywood: Should conform to IS 303:1989 for general-purpose plywood (Clause 3.3).

• Tolerances on Dimensions: Overall dimensions can vary by ±5 mm (Clause 4.2).

• Information to be Supplied by Purchaser (A-1):

  • Type of lock
  • Locker requirement
  • Number of shelves (adjustable/fixed)
  • Colour of finish
  • Alternative construction/finish methods

• Units & Symbols: Use SI units as per the standard (e.g., length in meters, mass in kg, pressure in pascals).

Relevant Units for Structural Materials

Summary Diagram: Material Specification Flow

flowchart TD
    A[Order Specification] --> B[Material Type]
    B --> C{Paint / Enamel / Varnish?}
    C -- Yes --> D[IS 2338 (Part 2)-1967]
    C -- No --> E{Plywood?}
    E -- Yes --> F[IS 303:1989]
    E -- No --> G[Other Materials]
    A --> H[Finish Colour & Lock Type]

For detailed finishing schedules and adhesive specs, refer to IS 2338 and IS 303 respectively.

IS 4126: Dimensions and Tolerances for Wardrobes

1. Overall Dimensions (Clause 4.1)

2. Minimum Clearances for Installation

• Top clearance: 20 mm
• Each side clearance: 10 mm
• Depth clearance: 5 mm

3. Tolerances (Clause 4.2)

• Overall dimensions may vary by ± 5 mm.

Summary Table:

Notes:

• Dimensions ensure proper fit and functionality.
• Tolerances allow for manufacturing variability.
• Clearances facilitate installation in recesses/openings.

flowchart LR
    A[Wardrobe Dimensions] --> B[Height: 1980 mm]
    A --> C[Width: 990 mm]
    A --> D[Depth: 610 mm]
    A --> E[Tolerance ±5 mm]
    F[Installation Clearances] --> G[Top: 20 mm]
    F --> H[Sides: 10 mm each]
    F --> I[Depth: 5 mm]

This concise data ensures compliance with IS 4126 for wardrobe manufacturing and installation.

IS 4126: Components and Construction - Key Points

1. Assembly of Components (Clause 6.1)

• Components are joined using glue and screws.
• Procedure:
  • Drill a pilot hole before inserting screws.
  • Dip screws in glue before driving them into the wood.
  • Screws must be securely fixed under pressure.

2. Dimensional Tolerances (Clause 4.2)

• Overall dimensions tolerance: ± 5 mm.

3. Paint and Finish (Clause 3.9)

• Paint, enamel, and varnish must comply with IS 2338 (Part 2)-1967 schedule.

4. Adhesives Specification

• Use adhesives conforming to:
  • Animal glue for general woodworking.
  • Polyvinyl acetate dispersion-based adhesives.

5. Purchaser Information (A-1)

• Specify:
  • Lock type,
  • Locker requirement,
  • Number of shelves (fixed/adjustable),
  • Finish color,
  • Alternative construction/finish methods.

Summary Table: Dimensional Tolerance

Assembly Illustration (Mermaid.js)

graph TD
  A[Wood Panel] --> B[Drill Pilot Hole]
  B --> C[Dip Screw in Glue]
  C --> D[Drive Screw Under Pressure]
  D --> E[Secure Assembly]

This ensures strong, durable joints with minimal dimensional variation.

IS 4126: Assembly Key Points & Specifications

Assembly (Clause 6.1)

• Components assembled using glue + screws fixed under pressure.
• Before screwing:
  • Drill a pilot hole in the wood panel.
  • Dip the screw in glue.
• Ensures strong, durable joints.

Dimensional Tolerances (Clause 4.2)

• Overall dimensions tolerance: ±5 mm.

Adhesives Specification

• Use animal glue or polyvinyl acetate dispersion-based adhesives suitable for wood.
• Refer to:
  • IS code for animal glue (first revision).
  • IS code for polyvinyl acetate adhesives (first revision).

Finishing (Clause 3.9)

• Paint, enamel, varnish per IS 2338 (Part 2)-1967.
• Tests for finishes include resistance to oils, liquids, and mechanical damage.

Assembly Process Summary

flowchart TD
  A[Prepare Wood Components] --> B[Drill Pilot Holes]
  B --> C[Apply Glue to Screw]
  C --> D[Drive Screw into Panel]
  D --> E[Fix Under Pressure]
  E --> F[Allow Adhesive to Cure]

Note: For knocked down wardrobes, manufacturer must supply detailed joining instructions (Clause 11.2).

IS 4126 - Additional Accessories Key Points

• Mirror Specifications (Clause 7.1):

  • Thickness: ≥ 5 mm
  • Dimensions:
    • Large wardrobes: ≥ 1200 mm × 300 mm
    • Small wardrobes: ≥ 750 mm × 250 mm
  • Mirror must conform to IS 3438:1977 (Silvered glass mirrors for general purposes).
  • Fixing: Suitable fixtures with or without beading.

• Assembly (Clause 6.1):

  • Components joined by glue and screws.
  • Pilot holes must be drilled before screw insertion.
  • Screws dipped in glue before driving for secure fixing.

• Additional Accessories (optional):

  • Steel butt hinges (4th revision)
  • Continuous (piano) hinges (1st revision)
  • Non-ferrous metal butt hinges (4th revision)
  • Electroplated coatings of nickel and chromium on iron and steel (1st revision)
  • Animal glue and polyvinyl acetate adhesives as per relevant IS specifications.

Assembly Process Summary

flowchart TD
    A[Wood Panel] --> B[Drill Pilot Hole]
    B --> C[Screw dipped in Glue]
    C --> D[Drive Screw into Panel]
    D --> E[Secure Fixing of Components]

Important Tolerances (Clause 4.2)

• Overall dimensions tolerance: ± 5 mm

This ensures durable, precise assembly and quality finishing of wardrobes with optional accessories as per purchaser's requirements.

IS 4126: Finishing Requirements - Key Points

1. Finish Quality (Clause 8.2 & 8.4)

• Surface: Smooth, uniform, defect-free (no chipping/flaking).
• Dry Film Thickness: ≥ 0.10 mm.
• Adherence: Well bonded to substrate.

2. Paint & Coating Standards (Clause 3.9)

• Use paints, enamels, varnishes as per IS 2338 (Part 2)-1967 schedule.

3. Heat Resistance (Clause 9.3)

• Surface must pass wet heat resistance test as per IS 5807 (Part 2)-1975.
• Minimum qualifying rating: conform to rating 7 of IS 5807 (Part 2)-1975.

4. Additional References

• Wood finishing operations: IS Code of Practice Part 1.
• Putty specifications for window frames.
• Test methods for resistance to dry and wet heat (wood finishes).

Summary Table: Dry Film Thickness & Heat Resistance

flowchart LR
    A[Surface Preparation] --> B[Apply Paint/Enamel/Varnish]
    B --> C[Check Dry Film Thickness ≥ 0.10 mm]
    C --> D{Surface Finish}
    D -->|Smooth & Defect-free| E[Pass]
    D -->|Chipping/Flaking| F[Fail]
    E --> G[Heat Resistance Test (Wet Heat)]
    G -->|Rating ≥ 7| H[Final Approval]
    G -->|Rating < 7| F

This ensures durable, quality finishes compliant with IS 4126.

IS 4126 - Performance Requirements of Finish (Clause 8.4 and related clauses)

Key Specifications:

• Finish quality (Clause 8.2):

  • Smooth, uniform, free from visible defects.
  • Well adhered; no chipping or flaking.
  • Minimum dry film thickness: 0.10 mm.

• Resistance to Wet Heat (Clause 9.3):

  • Test as per IS 5807 (Part 2)-1975.
  • Minimum qualifying average ratings per IS 5807 (Part 2).

• Materials (Clause 3.9):

  • Paints, enamels, varnishes must comply with IS 2338 (Part 2)-1967.

Relevant Standards for Testing:

Summary Table: Minimum Dry Film Thickness

flowchart TD
    A[Finish Application] --> B{Check Finish Quality}
    B -->|Smooth & Uniform| C[Measure Dry Film Thickness]
    B -->|Defects Present| D[Rework Finish]
    C -->|≥ 0.10 mm| E[Test Resistance to Wet Heat]
    C -->|< 0.10 mm| D
    E -->|Pass| F[Finish Approved]
    E -->|Fail| D

Note: For detailed rating scales and test procedures, refer to IS 5807 (Part 2)-1975 and IS 2338 (Part 2)-1967.

IS 4126: Quality & Environmental Requirements Summary

Key Points from IS 4126:

• Quality Requirements (Clause 10.1.1):
  Products must meet specified quality and performance standards.

• Environmental Requirements (Clause 10.2):
  Products aiming for the ECO Mark must fulfill additional environment-friendly criteria.

  • Manufacturer must provide documentary evidence (certificate/declaration) to BIS.

• Purchaser Information (Appendix A-1):
  Purchaser must specify:

  • Lock type
  • Locker requirement
  • Number of shelves (adjustable/fixed)
  • Finish color
  • Alternative construction/finish methods if any

• ECO Mark Labelling (Clause 12.2):
  Criteria for ECO Mark labelling must be clearly indicated on the product.

SI Units & Definitions (from IS 4126):

Summary Diagram: ECO Mark Certification Process

flowchart TD
    A[Manufacturer Produces Product] --> B[Meets Quality & Performance Standards]
    B --> C{Meets ECO Mark Environmental Criteria?}
    C -- Yes --> D[Apply to BIS with Certificate]
    D --> E[BIS Grants ECO Mark]
    C -- No --> F[No ECO Mark

IS 4126: Packaging and Delivery - Key Points & Specifications

Clause 11.1 - Packaging:

• All component parts must be packed to prevent any damage during transit.
• Packaging should ensure protection against mechanical damage, moisture, and other environmental factors.

Clause 11.2 - Knocked Down Condition:

• If the purchaser requests, wardrobes can be supplied in knocked down form.
• Manufacturer must prepare components for quick assembly.
• Complete fixing instructions must be supplied.

Additional Notes:

• Methods of test for finishes include resistance to oils, liquids, and mechanical damage.
• Purchaser must specify details like lock type, shelves, finish color, and construction methods.

Summary Table: Packaging & Delivery Requirements

Packaging Best Practices (Engineering Insight):

• Use shock-absorbing materials (foam, bubble wrap).
• Seal against moisture with waterproof wrapping.
• Use rigid crates or boxes sized to component dimensions.
• Label packages clearly with handling instructions.

flowchart LR
    A[Component Manufacturing] --> B[Protective Packaging]
    B --> C{Knocked Down?}
    C -->|Yes| D[Prepare for Quick Assembly]
    C -->|No| E[Assemble Fully]
    D --> F[Include Fixing Instructions]
    E --> F
    F --> G[Delivery to Purchaser]

This ensures safe delivery and easy on-site assembly per IS 4126.

IS 4126 - Marking and Labelling Key Points

1. Information to be supplied by Purchaser (Clause 12.2)

• Type of lock required
• Whether locker is required
• Number of adjustable/fixed shelves
• Colour of finish
• Alternative construction/finish methods (if any)

2. Marking Requirements

• Products may carry the ISI Certification Mark (Clause 12.1.1)
• ECO Mark labelling criteria per Ministry of Environment and Forests, administered by BIS.
• Products with ECO Mark must also carry the ISI Mark and meet environmental standards.

3. Resistance to Marking by Liquids (Clause 9.5)

• Tested as per IS 5807 (Part 4)-1975
• Minimum qualifying average ratings per IS 5807 standards.

4. Units for Marking (SI Units)

Summary Diagram of Marking Process

flowchart TD
    A[Order Placement] --> B[Purchaser supplies info]
    B --> C[Supplier manufactures product]
    C --> D[Apply ISI Mark]
    C --> E[Apply ECO Mark (if eligible)]
    D & E --> F[Product ready for dispatch]

Note: ISI Mark ensures compliance with IS 4126 and continuous quality control by BIS. ECO Mark indicates environment-friendly compliance.

For detailed test procedures, refer to IS 5807 (Part 4)-1975.

IS 4126 — Information to be Supplied by the Purchaser

When placing an order for wooden wardrobes/furniture, the purchaser must provide the following key information to the supplier as per Clause A-1:

• Type of lock required (if any)
• Requirement of locker (yes/no)
• Number of adjustable/fixed shelves
• Colour of finish
• Alternative methods of construction and finish, if any specified

This ensures correct manufacturing and delivery, including knocked down condition preparation with assembly instructions (Clause 11.2).

Additional Relevant Specifications

• Paint, enamel, varnish to conform to IS 2338 (Part 2)-1967 (Clause 3.9)
• Labeling for ECO Mark compliance per Clause 12.2
• Use SI Units for all dimensions and quantities (e.g., length in meters, force in newtons)

Summary Table: Purchaser's Required Information

flowchart TD
    A[Purchaser places order] --> B[Provide info: Lock Type, Locker, Shelves, Colour, Alternatives]
    B --> C[Manufacturer prepares components]
    C --> D[If knocked down: supply assembly instructions]
    D --> E[Manufacture & supply finished product]

This process ensures clarity, quality, and conformity to IS 4126 standards.