metal chairs for office purposes Specification, Part 2: Revolving and tilting (BI-LINGUAL)

IS 3499 - Scope Summary & Key Specifications

• Scope: Covers metal chairs using materials like wrought aluminium, steel tubes, and wood suitable for furniture (per IS 399:1963).

• Materials:

  • Wood: As per IS 399:1963 (Classification of commercial timbers).
  • Aluminium Tubes: Must conform to IS 1285:1975 (IS Designations 62400, 63400, 65032).
  • Steel: Cold rolled carbon steel sheets (2nd revision), hot rolled carbon steel sheets (3rd revision), steel tubes for furniture.

• Welding Methods: Must comply with

  • Gas welding: IS 1323:1966
  • Arc welding: IS 816:1969
  • Spot welding: IS 819:1957

• Marking: Metal chairs may bear the BIS Standard Mark under Clause 10.2, ensuring quality control and conformity.

Reference Table: Aluminium Tube IS Designations (IS 1285:1975)

Welding Standards Summary

This scope ensures materials and fabrication methods meet strict quality and safety standards for metal furniture manufacturing.

IS 3499 - Materials Key Specifications

1. Wood for Furniture (Clause 2.8)

• Use wood conforming to IS 399:1963.
• Classification and zonal distribution of commercial timbers per IS 399.
• Suitable timbers are durable, well-seasoned, and free from defects.

2. Mild Steel Sheets (Clause 2.5)

• Use Grade 0 mild steel sheets as per:
  • IS 513:1973 (Cold Rolled Carbon Steel Sheets)
  • IS 1079:1973 (Hot Rolled Carbon Steel Sheets)

3. Aluminium Tubes (Clause 2.1)

• Aluminium tubes must conform to IS Designations:
  • 62400, 63400, or 65032 as per IS 1285:1975.
• Typically extruded round or hollow sections for engineering purposes.

4. Welding Materials

• Filler rods and wires for gas welding as per relevant IS standards.
• Covered electrodes for metal arc welding (structural steel) per IS specifications.
• Resistance spot-welding electrodes as per IS standards.

Summary Table of Material Standards

If you need specific mechanical properties or dimensional tables, please specify.

IS 3499: Chair Dimensions Key Specifications

• Clause 3.1.4: Minimum Overall Dimensions

  • Height: 785 mm
  • Width (including arms): 535 mm

• Clause 3.1: Dimensions detailed in 3.1.1 to 3.1.4 (refer to the standard for seat height, depth, backrest height, etc.)

• Material Specifications:

  • Wood must conform to IS 399:1963 (suitable for furniture)
  • Aluminium tubes to conform to IS 1285:1975 (IS Designation 62400, 63400, or 65032)
  • Steel tubes per IS 1161 (for furniture)
  • Screws, welding electrodes, and polish per referenced IS codes

Summary Table of Minimum Chair Dimensions (from Clause 3.1.4)

Additional Notes:

• For detailed sectional dimensions (seat height, depth, backrest angle), refer to clauses 3.1.1 to 3.1.3.
• Use wood and metal materials as per referenced IS standards to ensure durability and compliance.

flowchart TD
    A[Chair Dimensions] --> B[Overall Height: 785 mm]
    A --> C[Overall Width: 535 mm]
    A --> D[Material Specs]
    D --> E[Wood: IS 399:1963]
    D --> F[Aluminium Tubes: IS 1285:1975]
    D --> G[Steel Tubes: IS 1161]

This ensures ergonomic and standardized chair design per IS 3499.

IS 3499: Construction - Key Specifications & References

Materials Specifications:

• Wood for Furniture: As per IS 399:1963 (suitable timber species and quality).
• Aluminium Tubes: Must conform to IS 1285:1975 (IS Designations 62400, 63400, or 65032).
• Steel Tubes: Shall conform to IS 7138:1973.
• Wrought Aluminium & Alloy Tubes: As per relevant IS standards for extruded round/hollow sections.
• Steel Sheets: Cold rolled (second revision) and hot rolled (third revision) carbon steel sheets.
• Welding Electrodes & Filler Rods:
  • Gas welding rods (second revision).
  • Covered electrodes for metal arc welding (IS 814 Part 1, fourth revision).
  • Resistance spot welding electrodes (IS 819, 1957).

Welding Codes:

• Gas Welding: IS 1323:1966
• Arc Welding: IS 816:1969
• Spot Welding: IS 819:1957

Additional Specifications:

• Polish for wooden furniture (French polish and paste).
• Slotted countersunk head screws (third revision).
• Classification of commercial timbers and their zonal distribution (revised).

Summary Table of Key IS Codes for Construction Materials:

This framework ensures material quality and welding integrity in construction per IS 3499. For design formulas or detailed tables, refer to the respective IS codes mentioned.

IS 3499 - Assembly Key Specifications & Formulas

1. Material Specifications

• Use wood per IS 399:1963 for furniture.
• Metal components: steel tubular pipes or aluminum tubes.
• Steel tubes: wall thickness ≥ 1.60 mm; aluminum tubes: wall thickness ≥ 2.0 mm.
• Steel sheets: thickness ≥ 1.0 mm.

2. Base Frame (Clause 4.1)

• Minimum 4 legs.
• Tubular pipes can be round or square:
  • Round tube outside diameter ≥ 25 mm.
  • Square tube side length ≥ 20 mm.

3. Assembly Methods (Clause 5.1)

• Components assembled by:
  • Welding
  • Bolting
  • Screwing

4. Welding & Fastening

• Use specifications for welding electrodes and filler rods as per referenced IS codes.
• Screws: slotted countersunk head screws per IS specifications.

Summary Table: Metal Tube Dimensions for Furniture Base

graph TD
A[Base Frame] --> B[4 Legs Minimum]
B --> C{Tube Shape}
C --> D[Round Tube]
C --> E[Square Tube]
D --> F[Steel: Ø ≥ 25mm, t ≥ 1.6mm]
D --> G[Aluminium: t ≥ 2.0mm]
E --> H[Steel: side ≥ 20mm, t ≥ 1.6mm]
E --> I[Aluminium: t ≥ 2.0mm]
A --> J[Assembly Methods]
J --> K[Welding]
J --> L[Bolting]
J --> M[Screwing]

This concise summary covers the key assembly requirements from IS 3499 for metal furniture components.

IS 3499 Finishing: Key Specifications & Formulas

1. Wood for Furniture (Clause 2.8)

• Use wood conforming to IS 399 : 1963 (Classification of commercial timbers).

2. Paint & Enamel Coats (Clause 6.1.3)

• Apply enamel paint coats as:
  • Finish coat with enamels per IS 151 : 1950, IS 2932 : 1974, or IS 2933 : 1975.

3. Wooden Arms Finishing (Clause 6.3)

• Polish with:
  • Wax polish, or
  • Transparent glossy French polish (conforming to IS 348 : 1968), or
  • Stain dark + polish/lacquer as per purchaser's choice.

4. French Polish (Clause 2.3)

• Must conform to IS 348 : 1968 (specification for French polish).

Summary Table: Finishing Specifications

Additional Notes:

• Ensure surface preparation per relevant IS standards before finishing.
• Multiple coats of enamel paint improve durability and appearance.
• French polish provides a glossy, transparent finish ideal for wooden furniture parts.

flowchart TD
    A[Wood Selection] -->|IS 399:1963| B[Surface Preparation]
    B --> C[Coat Enamel Paint]
    C -->|IS 151/2932/2933| D[Finish Coat]
    B --> E[Wooden Arms]
    E -->|Wax/French polish (IS 348)| F[Final Polish]

This concise guide covers essential finishing requirements per IS 3499.

IS 3499: Performance Requirements and Tests Summary

1. Pressure Test (Clause 7.2)

• The furniture components, especially metal tubes and joints, must undergo pressure testing to ensure structural integrity.
• Pressure values and duration are specified to simulate service conditions (refer IS 3499 Clause 7.2 for exact test pressure and hold time).

2. Material Specifications

• Wood: Use wood as per IS 399:1963 (suitable for furniture).
• Metal Tubes: Follow specifications for wrought aluminium, aluminium alloy, cold-rolled and hot-rolled carbon steel sheets, and steel tubes for furniture.
• Welding: Welding methods must comply with:
  • Gas welding: IS 1323:1966
  • Arc welding: IS 816:1969
  • Spot welding: IS 819:1957

3. Marking (Clause 10.2)

• Metal chairs may bear the BIS Standard Mark indicating compliance with IS 3499.
• The Standard Mark ensures production under strict quality control and continuous BIS inspection.

Key Tables (Example from Clause 10.2)

Summary Diagram: Test & Material Flow

flowchart LR
    A[Material Selection] --> B[Welding as per IS 1323, 816, 819]
    B --> C[Assembly]
    C --> D[Pressure Test (Clause 7.2)]
    D --> E[Marking & Quality Control (Clause 10.2)]
    E --> F[Final Product]

Note: For detailed pressure values, test durations, and welding parameters, refer directly to IS 3499 clauses and referenced IS codes.

IS 3499 - Packaging Key Points

• Clause 8.1: All component parts must be packed to prevent damage during transit. Packaging should ensure protection against mechanical shocks, moisture, and corrosion.

• Material Specifications for Packaging Components:

  • Use wood suitable for furniture as per IS 399:1963.
  • Aluminium tubes must conform to IS 1285:1975 (IS Designation 62400, 63400, or 65032).
  • Welding methods for assembly parts follow IS 1323, IS 816, and IS 819 for gas, arc, and spot welding respectively.

Packaging Guidelines Summary

Packaging Best Practices

• Use cushioning materials (e.g., polyethylene cane) to absorb shocks.
• Protect metal parts from moisture and corrosion using suitable coatings or wraps.
• Ensure secure fastening of components inside packaging to avoid movement.

flowchart LR
    A[Component Parts] --> B{Packaging}
    B --> C[Wooden Crates (IS 399)]
    B --> D[Aluminium Tubes (IS 1285)]
    B --> E[Protective Wrapping]
    E --> F[Moisture Barrier]
    E --> G[Shock Absorbers]
    B --> H[Welding Methods (IS 1323, 816, 819)]

This ensures compliance with IS 3499 and protects components effectively during transit.

IS 3499 - Clause 9: Information to be Supplied by the Purchaser

The purchaser must provide the following details with the order to ensure correct manufacturing and delivery:

• Type of seat required (e.g., fixed, swivel, cushioned)
• Type of back required (e.g., fixed, adjustable, cushioned)
• Castor unit requirement: Whether needed and the specific type (e.g., fixed, swivel, with brakes)
• Colour of finish (e.g., natural wood, painted, anodized aluminium)
• Alternative construction/finish methods, if any, must be clearly specified

Additional Relevant Specifications Referenced:

• Wood for furniture: IS 399:1963
• Aluminium parts: May be anodized as per purchaser's requirement (Clause 6.2)
• Steel and welding specifications: Various IS codes for materials and processes (e.g., welding electrodes, steel sheets)
• Furniture tubes: IS for steel tubes used in furniture

Packaging (Clause 8.1)

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

Summary Table for Purchaser's Information

flowchart TD
    A[Purchaser places order] --> B[Supplies seat type]
    B --> C[Supplies back type]
    C --> D[Specifies castor unit]
    D --> E[Specifies finish colour]
    E --> F[Specifies alternative methods]
    F --> G[Supplier manufactures as per info]
    G --> H[Components packed to avoid damage]

This ensures clarity and conformity to IS 3499 requirements.

IS 3499 - Marking Specifications for Metal Chairs

Key Clauses on Marking:

• Clause 10.1:
  All metal chairs shall be marked with a suitable mark identifying the manufacturer.

• Clause 10.2:
  Metal chairs may also bear the Standard Mark of BIS, indicating compliance with IS standards under BIS supervision and quality control.

Important Notes on Standard Mark:

• Use of the Standard Mark is governed by the Bureau of Indian Standards Act, 1986.
• It assures production under a well-defined system of inspection, testing, and quality control.
• Continuous BIS checks ensure conformity.
• Licensing conditions for use of the Standard Mark are available from BIS.

Summary Table for Marking (Clause 10.2):

This table likely refers to marking dimensions or sizes relevant to identification marks.

Additional References:

• Use wood as per IS 399:1963 for furniture.
• Welding methods must conform to:
  • Gas welding: IS 1323:1966
  • Arc welding: IS 816:1969
  • Spot welding: IS 819:1957

Summary:

• Mark all metal chairs with manufacturer's identification.
• Optionally, use the BIS Standard Mark for assured compliance.
• Follow BIS licensing for Standard Mark usage.
• Marking size guidelines are provided (10mm to 100mm).
• Welding and material specifications must comply with referenced IS codes.

If you want, I can help visualize the marking process or manufacturer identification flow using a diagram.