metal nesting chairs- Specification

IS 4103: Scope - Key Points & Specifications

Scope Summary:

• IS 4103 covers specifications for materials/components with emphasis on finish and marking.
• Purchaser must specify colour, finish, and any alternative construction methods when ordering (Clause 9.1).
• Wooden components require specific finishes: wax polish, French polish, staining, lacquer, epoxy or melamine finish (Clause 6.3).
• Performance requirements for finishes are detailed in subsequent clauses (e.g., Clause 7).

Important Specifications & Tables:

Order Information Required (Clause 9.1):

• Colour and finish details
• Alternative construction/finish methods (if any)

Finishing of Wooden Components (Clause 6.3):

• Wax polish
• Transparent glossy French polish
• Stained dark + polished
• Lacquered
• Epoxy or melamine finish

Notes on Rounding (Clause 0.4):

• Final test/analysis values must be rounded per IS 2-1960.
• Maintain significant figures consistent with specified values.

flowchart TD
    A[Purchaser places order] --> B{Provide info}
    B --> |Colour & Finish| C[Supplier prepares accordingly]
    B --> |Alternative methods| C
    C --> D[Manufacture components]
    D --> E[Apply finish per Clause 6.3]

For detailed performance and marking requirements, refer to clauses 7 and 9 respectively.

IS 4103: Materials - Key Specifications & References

• Mild Steel Components (Clause 6.1):
  Mild steel sheets must conform to:

  • IS 513: 1973 (Cold rolled steel sheets)
  • IS 1079: 1973 (Hot rolled steel sheets)

• Wooden Components (Clause 6.3):
  Finishes allowed:

  • Wax polish
  • Transparent glossy French polish
  • Stained dark and polished
  • Lacquered
  • Epoxy or melamine finish

• Surface Treatments & Paints:

  • Phosphate treatment for corrosion protection
  • Paste filler for color coats
  • Ready mixed paints for brushing, spraying, undercoating, stoving (enamels & general)
  • Anodic coatings on aluminium (1st revision)

• Units (SI) Reference:

  • Force: 1 N = 1 kg·m/s²
  • Stress/Pressure: 1 Pa = 1 N/m²
  • Energy: 1 J = 1 N·m
  • Power: 1 W = 1 J/s

Summary Table for Mild Steel Sheets

Material Finishing Flow (Mermaid Diagram)

flowchart TD
    A[Wooden Components] --> B[Wax Polish]
    A --> C[French Polish]
    A --> D[Stain & Polish]
    A --> E[Lacquer]
    A --> F[Epoxy/Melamine Finish]

For detailed paint specifications and surface treatments, refer to the respective IS standards cited in IS 4103 Clause 6.

IS 4103 Key Specifications & Formulas for Components

1. Mild Steel Components (Clause 6.1)

• Use mild steel as per relevant IS standards.
• Surface treatment may include phosphate treatment for corrosion protection.
• Paint finishes as per IS specifications (e.g., aluminium-zinc oxide primer, enamel paints).

2. Aluminium Components (Clause 6.2)

• Aluminium may be anodized.
• Minimum anodic coating thickness: Grade AC15 as per IS 1868-1968.

3. Wooden Components (Clause 6.3)

• Finishes include:
  • Wax polish
  • Transparent glossy French polish
  • Dark stain + polish
  • Lacquer
  • Epoxy or melamine finish

4. Marking & Order Details (Clause 9.1)

• Purchaser must specify:
  • Colour and finish
  • Alternative construction/finish methods if any

Units & Conversions (SI Units)

Typical Surface Treatment Flow (Mermaid Diagram)

flowchart TD
    A[Steel Component] --> B[Phosphate Treatment]
    B --> C[Primer (Al-Zn Oxide)]
    C --> D[Enamel Paint Finish]
    A --> E[Aluminium Component]
    E --> F[Anodizing (Grade AC15)]
    A --> G[Wooden Component]
    G --> H[Polish/Lacquer/Epoxy Finish]

This summary covers key component specifications, finishes, and purchaser requirements per IS 4103. For detailed design or thickness tables, refer to the full IS 4103 document and related IS standards.

IS 4103: Design and Construction - Key Specifications & References

• Material Specifications:

  • Aluminium sheets must conform to IS 737-1974, Designation 31000 or 52000 (Clause 2.4).
  • Wooden components require surface finishes such as wax polish, French polish, lacquer, epoxy, or melamine (Clause 6.3).

• Order Information (Clause 9.1):

  • Purchaser must specify colour and finish.
  • Alternative methods of construction and finish must be clearly stated.

• Surface Treatment and Paints:

  • Phosphate treatment for corrosion protection.
  • Specifications for various paints: paste filler, aluminium-zinc oxide primer, enamel finishing coats, anodic coatings on aluminium.

• Units & Symbols (SI Units):

  • Length: m, Mass: kg, Force: N (1 N = 1 kg·m/s²)
  • Pressure/Stress: Pa (1 Pa = 1 N/m²)

• Rounding Off (Clause 0.4):

  • Final test values must be rounded as per IS 2-1960, maintaining the same significant digits as specified.

Summary Table: Material & Finish

Key Formula

• Force:
  [ F = m \times a \quad (N = kg \cdot m/s^2) ]

• Pressure/Stress:
  [ \sigma = \frac{F}{A} \quad (Pa = N/m^2) ]

flowchart TD
    A[Order Placement] --> B[Specify Colour & Finish]
    B --> C{Alternative Methods?}
    C -- Yes --> D[Specify Construction & Finish Methods]
    C -- No --> E[Proceed with Standard]
    D --> E
    E --> F[Material Selection]
    F --> G[Aluminium Sheets (IS 737)]
    F --> H[Wooden Components (

IS 4103 - Key Dimensions for Chairs (Clause 5.1)

• Seat Height from Floor:
  ( \boxed{430 \pm 5 \text{ mm}} )
  (Recommended lower than traditional 455 mm for better ergonomics, especially for nesting chairs)

• General Notes:

  • Dimensions are in millimeters (mm).
  • See Fig. 1 in IS 4103 for typical nesting chair layout.
  • Purchaser must specify colour, finish, and construction method per Clause 9.1.

Summary Table of Key Dimension

Additional Specifications

• Use IS:2-1960 rounding rules for measured values.
• Purchaser to provide technical details at order placement (Clause 9.1).

flowchart LR
    A[Order Placement] --> B[Specify Colour & Finish]
    B --> C[Specify Construction Method]
    C --> D[Manufacture Chair]
    D --> E[Check Dimensions]
    E --> F{Seat Height?}
    F -- Yes --> G[430 ± 5 mm]
    F -- No --> H[Reject/Modify]

This ensures compliance with IS 4103 dimensional requirements for chairs.

IS 4103: Surface Treatment and Finishing - Key Points

1. Wooden Components (Clause 6.3)

• Finish options:
  • Wax polish
  • Transparent glossy French polish
  • Stained dark + polished
  • Lacquered
  • Epoxy or melamine finish

2. Metal Components Treatment

3. Paint Specifications

• Ready mixed paints for:
  • Brushing, spraying, undercoating, stoving, enamels, and general purposes
  • Aluminium-zinc oxide composite primer
• Anodic coatings on aluminium (first revision)

Summary Flow for Mild Steel Surface Treatment

flowchart LR
    A[Pickling] --> B[Phosphating (IS 3618)]
    B --> C[Primer Coating (Red Oxide)]
    C --> D[Putty Application (IS 426)]
    D --> E[Final Paint/Finish]

Note: Always refer to the specific IS codes mentioned for detailed procedures and quality requirements.

IS 4103: Performance Requirements of Finish (Clause 7, after 6.4)

• Wooden Components Finish (6.3):

  • Polish with wax, transparent glossy French polish, or stain dark + polish/lacquer.
  • Alternatively, epoxy or melamine finish.

• Paint & Coating Specifications:

  • Phosphate treatment for corrosion protection of iron/steel.
  • Paste filler for color coats (revised).
  • Ready mixed paints for brushing, spraying, undercoating, stoving for enamels/general purposes (various IS standards apply).
  • Aluminium-zinc oxide composite primer.
  • Anodic coatings on aluminium (first revision).

• Enamel Paint Coats (6.1.3):

  • Finish coat with enamels conforming to:
    • IS 151:1950
    • IS 2932:1974
    • IS 2933:1975

• Rounding Off Results (Clause 0.4):

  • Final test/analysis results must be rounded per IS 2:1960, matching the significant figures of the specified value.

Summary Table: Key Paint Standards for Finish Coats

flowchart TD
    A[Wooden Components] --> B[Wax Polish / French Polish / Stain + Polish]
    A --> C[Epoxy or Melamine Finish]
    D[Iron/Steel] --> E[Phosphate Treatment]
    F[Paint Application] --> G[Primer (Al-Zn Oxide)]
    F --> H[Undercoating / Enamel Coats]
    H --> I[Finish Coat as per IS

IS 4103 - Marking: Key Points & Specifications

Clause 9.1: Information to be Supplied by Purchaser

• Purchaser must specify:
  • Colour and finish of the product.
  • Alternative methods of construction and finish, if any.

Clause 8.1.1: ISI Certification Mark

• Metal nesting chairs may carry the ISI Certification Mark.
• ISI Mark guarantees compliance with Indian Standards under strict inspection and quality control.
• Use of ISI Mark is regulated by Indian Standards Institution (Certification Marks) Act.

Clause 6.3: Wooden Components Finish

• Wooden parts must be finished by:
  • Wax polish, transparent glossy French polish, or stained & polished.
  • Lacquered, epoxy, or melamine finish.

Units & Symbols (SI Units)

Summary Diagram: Marking Process Flow

flowchart TD
    A[Purchaser places order] --> B[Specify colour & finish]
    B --> C[Specify alternative methods]
    C --> D[Supplier manufactures product]
    D --> E[Apply finish to wooden/metal components]
    E --> F[Mark product with ISI Certification Mark (if applicable)]

Note: For detailed paint and coating specifications, refer to relevant IS standards mentioned (e.g., phosphate treatment, enamel paints).

IS 4103: Information to be Supplied by the Purchaser (Clause 9.1)

When placing an order, the purchaser must supply the following key information:

• Colour and finish of the product.
• Alternative methods of construction and finish, if applicable, must be clearly specified.

Additional Specifications & Notes:

• Final test or analysis values must be rounded off per IS 2-1960 to the same number of significant digits as the specified value.
• Wooden components finishes include:
  • Wax polish
  • Transparent glossy French polish
  • Stained dark and polished
  • Lacquered
  • Epoxy or melamine finish

Relevant Units (SI Units) from IS 4103:

Summary Diagram of Purchaser's Information Flow

flowchart TD
    A[Purchaser] -->|Order Placement| B[Supplier]
    B -->|Receives| C{Information Supplied}
    C -->|Colour & Finish| D[Manufacturing]
    C -->|Construction Method| D
    D --> E[Product Delivery]

Ensure clarity on finish and construction options in the purchase order to avoid ambiguity and ensure compliance with IS 4103 standards.

IS 4103 - Packaging Key Points

• Clause 7.1: All components must be packed to prevent damage during transit.

• Clause 9.1: Purchaser must specify:

  • Colour and finish.
  • Alternative construction/finish methods if any.

• Clause 6.3: Wooden parts require finishing by:

  • Wax polish, French polish, stain + polish, lacquer, epoxy, or melamine.

• Finishing & Protection:

  • Phosphate treatment for corrosion resistance.
  • Use of specified paints and primers (aluminium-zinc oxide composite primer, enamel paints).

• Marking & Order Info:

  • Purchaser supplies technical details at order placement (Clause 9.1).

Packaging & Finishing Summary

Important Units (SI) for Reference

flowchart TD
    A[Order Placed] --> B{Purchaser provides info}
    B -->|Colour & Finish| C[Supplier prepares components]
    B -->|Alternative methods| C
    C --> D[Components finished (polish, paint)]
    D --> E[Packaging to prevent damage]
    E --> F[Transit & Delivery]

Note: For detailed paint and treatment specs, refer to respective IS standards cited in IS 4103.