Recommendations for dimensions for spaces for human activities

IS 5823 - Scope (Clause 4.1) Key Points:

• Purpose: The shape, design, and dimensions of tables must suit their intended use, referencing relevant furniture standards.
• Table Top Shapes Allowed:
  • Rectangular
  • Square
  • Circular
• Dimensions: All dimensions are in millimeters.
• Related Specifications:
  • Plywood for general purposes
  • Classification and zonal distribution of commercial timbers
  • Maximum permissible moisture content for timber
  • Cut sizes of timber
  • Adhesives for wood (casein glue, animal glue, polyvinyl acetate)
  • Finishing and painting specifications

Fig. 1: Dimensions of Seating Place at the Table (Typical values)

Summary Diagram of Table Top Shapes:

graph LR
A[Table Top Shapes]
A --> B(Rectangular)
A --> C(Square)
A --> D(Circular)

This scope ensures ergonomic and functional furniture design aligned with Indian and international standards.

IS 5823: Materials and Specifications - Key Points

1. Materials Specifications:

• Timber:
  • Use commercial timbers as per Classification and Zonal Distribution (revised).
  • Maximum permissible moisture content varies by timber use (second revision).
  • Cut sizes of timber specified (second revision).
• Plywood:
  • Must conform to Specification for plywood for general purposes (second revision).
• Blockboard:
  • Conform to IS 1659-1979.
  • Grade I for air-drying finishes; Grade II for oven-drying finishes.
• Adhesives:
  • Cold setting casein glue.
  • Animal glue for wood-working.
  • Polyvinyl acetate dispersion-based adhesives.
• Steel:
  • Mild steel sheets as per IS 513-1973 (Grade 0) and IS 1079-1973 (Grade 0).
  • Specifications for welding materials and electrodes.
• Aluminium:
  • Sheets, strips, tubes, and hollow sections as per relevant IS standards.

2. Dimensional Guidelines:

• All dimensions are in millimetres.
• Table tops can be rectangular, square, or circular.
• Seating place dimensions are illustrated in Fig. 1 (not provided here).

Summary Table: Timber Grades & Moisture Content

Adhesive Types & Uses

flowchart LR
    A[Materials] --> B[Timber]
    A --> C[Plywood]
    A --> D[Blockboard]
    A --> E[Adhesives]
    A --> F[Steel]
    A --> G[Aluminium]

    B --> B1[Classification & Zonal Distribution]
    B --> B2[Moisture Content Limits]
    E --> E

IS 5823: Functional Dimensions for Dining Tables

Key Dimensions (Clause 3.1 & Fig. 1)

• Table height: 710 to 730 mm
• Clearance under table (floor to underside): ≥ 610 mm
• Tabletop shape: Rectangular, square, or circular (as per design need)

Seating Place Dimensions (from Fig. 1)

• Width per person: Typically ~600 mm (to allow comfortable seating)
• Depth of seating space: ~400-450 mm
• Knee clearance: ≥ 610 mm (matches under-table clearance)

Design Guidelines (Clause 4.1)

• Choose shape and dimensions based on purpose and furniture standards.
• Dimensions depend on number of persons (e.g., table length = 600 mm × number of persons on one side).

Summary Table of Functional Dimensions

flowchart TD
    A[Table Height: 710-730 mm] --> B[Clearance under Table ≥ 610 mm]
    B --> C[Seating Width per Person ~600 mm]
    C --> D[Seating Depth 400-450 mm]
    D --> E[Tabletop Shape: Rectangular/Square/Circular]

This ensures ergonomic comfort and functional usability as per IS 5823.

IS 5823: Construction Requirements Summary

Key Construction Requirements (Clause 7.3 & 6.1)

• Construction must conform strictly to design particulars (Clause 2).
• General requirements include material specifications, dimensions, and workmanship.

Design & Dimensions (Clause 4.1)

• Table tops can be rectangular, square, or circular.
• Dimensions should suit the intended purpose and conform to furniture standards.

Material Specifications

• Use plywood for general purposes as per the second revision.
• Follow classification and zonal distribution of commercial timbers.
• Maintain maximum permissible moisture content for timber depending on use.
• Use specified adhesives:
  • Cold setting casein glue
  • Animal glue for woodworking
  • Polyvinyl acetate dispersion-based adhesives

Typical Dimensions (Fig. 1 - Seating Place at Table)

Additional Notes

• All dimensions are in millimeters.
• Material cut sizes and glue specifications are standardized as per referenced IS codes.

flowchart TD
    A[Design & Shape] --> B[Rectangular / Square / Circular]
    B --> C[Dimensions per purpose]
    C --> D[Material Selection]
    D --> E[Plywood / Commercial Timbers]
    E --> F[Moisture Content Control]
    F --> G[Adhesives: Casein / Animal / PVA]
    G --> H[Construction & Quality Check]

This ensures durability, usability, and compliance with IS standards for furniture construction.

IS 5823: Finishing and Surface Treatment - Key Points

1. Wooden Components Finishing (Clause 5.8)

• Surface finishes: lacquer, polish, varnish, melamine, polyester coating.
• Application methods must comply with IS 2338 (Parts 1 & 2) - 1967.
• Ensures durability and aesthetic quality.

2. Paint Finishing (Clause 5.4)

• Finish coat(s) of enamel paint applied after priming.
• Enamel paint standards:
  • IS 151-1950 (ready mixed paint, brushing)
  • IS 2932-1974 (ready mixed paint, spraying, stoving enamel)
  • IS 2933-1975 (enamel exterior undercoating & finishing)
• Paint must be compatible with primers and surface.

3. Phosphating Treatment for Mild Steel (Clause 5.2)

• After pickling, apply phosphating treatment as per:
  • IS 3618-1966 (Class C) for corrosion protection.
  • Application process per IS 6005-1970.
• Ensures corrosion resistance before painting.

Summary Table for Surface Treatments

flowchart TD
    A[Wooden Components] --> B[Surface Finish]
    B --> C[Lacquer/Polish/Varnish/Melamine/Polyester]
    D[Mild Steel Parts] --> E[Pickling]
    E --> F[Phosphating Treatment (IS 3618)]
    F --> G[Enamel Paint Finish (IS 151/2932/2933)]
``

IS 5823: Marking and Identification of Dining Tables

Key Specifications (Clauses 6.1 & 6.1.1)

• Manufacturer's Mark: Every dining table must bear a suitable mark identifying the manufacturer.
• ISI Certification Mark: May be applied if the product complies with IS standards and licensing conditions under the Indian Standards Institution (Certification Marks) Act.
• ECO Mark: Optional environmental labeling administered by BIS for eco-friendly products, requiring BIS Standard Mark as a prerequisite.

Testing for Surface Resistance to Marking (Clause 7.7)

• Test Standard: IS 5807 (Part 4) - 1975.
• Requirement: Minimum qualifying average rating as per IS 5807 (Part 4) must be met to ensure surface resistance to liquids.

Summary Table for Marking Requirements

Notes:

• ISI Mark usage is strictly regulated and indicates compliance with quality control.
• Surface resistance testing ensures durability against liquid marking.

flowchart TD
    A[Dining Table] --> B[Manufacturer's Mark (Mandatory)]
    A --> C[ISI Certification Mark (Optional)]
    A --> D[ECO Mark (Optional, Environment Friendly)]
    B --> E[Identification of Manufacturer]
    C --> F[Quality Assurance under ISI Act]
    D --> G[Additional Environmental Criteria]

This ensures traceability, quality assurance, and optional environmental compliance per IS 5823.

IS 5823: Sampling and Testing Key Points

Sampling Scheme (Clause 7.1)

• Batch size up to 50 units: Take 2 samples.
• For every additional 200 units or part thereof: Take 1 additional sample.

Testing Procedure (Clause 7.2)

• Samples drawn as per 7.1.
• Samples checked for:
  • Dimensions and tolerances (Clause 7.2.1, referencing Clause 3).
  • Other inspections and tests as per Clauses 7.3 to 7.8.

ISI Certification (Clause 6.1.1)

• Products may bear the ISI Mark indicating compliance.
• Ensures ongoing quality control and periodic inspection by ISI.

Summary Diagram: Sampling Process

flowchart TD
    A[Batch Received] --> B{Batch Size ≤ 50?}
    B -- Yes --> C[Take 2 Samples]
    B -- No --> D[Calculate extra samples: (Batch Size - 50)/200]
    D --> E[Take 2 + extra samples]
    C --> F[Check Dimensions & Tolerances]
    E --> F
    F --> G[Conduct Tests (7.3 to 7.8)]
    G --> H[Accept/Reject Batch]

This ensures representative quality checks per batch size for compliance with IS 5823.

IS 5823 - Quality and Performance Requirements: Key Points

1. General Requirements (Clause 6.1 & 4.1)

• Shape & Design: Table tops can be rectangular, square, or circular.
• Dimensions: Must be suitable for the intended purpose, referencing furniture standards.
• Materials: Use plywood, timber, and adhesives conforming to relevant IS specifications:
  • Plywood: IS for general purposes (2nd revision)
  • Timber: Classified by commercial type and zone
  • Moisture Content: Max permissible limits per timber use
  • Adhesives: Casein glue, animal glue, and polyvinyl acetate-based adhesives as per IS

2. Specific Requirements (Clause 6.2)

• Product must meet ECO Mark criteria.
• Manufacturer must submit certificates/declarations to BIS for ECO Mark approval.

3. Dimensions Reference (Fig.1)

• Seating dimensions are standardized (all in mm).

Typical Table Seating Dimensions (Indicative)

Summary Diagram: Quality & Performance Flow

flowchart TD
    A[Material Selection] --> B[Conformance to IS Specs]
    B --> C[Design & Dimensions]
    C --> D[Adhesives & Moisture Control]
    D --> E[Manufacturing & Testing]
    E --> F[Certification for ECO Mark]

Ensure all materials and processes comply with IS 5823 and related standards for quality and durability.