ledged braced and battened timber door shutters

IS 6198: Scope - Key Formulas, Tables, and Specifications

1. Scope Overview

• Covers timber door, window, and ventilator shutters.
• Specifies dimensions, materials, workmanship, testing, and marking.
• Applies to imported and Indian timbers suitable for these applications.

2. Sampling & Conformity (Clause 3.1, Table C-4)

Note: For lots ≤ 25 shutters, sampling is mutually agreed.

3. Dimensions & Tolerances (Clause 6.1, Table 3)

All battens must have uniform width.

4. Timber Species (Annex A)

• Lists imported timber species suitable for shutters, e.g., Dark Red Meranti, Merbau, Afromosia.
• Timber trade names may include multiple species; adopt lowest property values.

5. Referenced IS Codes (Annex B)

• IS 401: Preservation of timber
• IS 4141: Seasoning of timber
• IS 2338: Finishing of

IS 6198 - References: Key Formulas, Tables & Specifications

1. Marking & Thickness

• t = Thickness of shutter
• Fig. 2 shows meeting of stiles for double-leaved shutters (Splayed & Square types).

2. Imported Timber Species Suitable for Doors, Windows & Ventilators (Annex A)

Note: Use lowest property values among species under a trade name.

3. Sampling & Quality Control (Clause 3.1, Table 4)

4. Referenced Indian Standards (Annex B)

Summary

Classification of Timber (IS 6198 - Clause 4.1.5 and Annex A)

Timber Grades Based on Defects (Table 1)

Moisture Content (Clause 4.1.2)

• Maximum permissible moisture content: 8% to 14%

Timber Species (Annex A)

• Imported species suitable for doors/windows include:
  • Malaysian (M): Dark Red Meranti, Kapur, Keruing, Merbau, Selangan Batu (Balau)
  • Papua New Guinea (PNG): Amoora, Cedar Java, Light Red Meranti, Terminalia (Red Brown Group)
  • Africa (A): Afromosia, Afara, Afzelia, Utile, Iroke

Summary:

• Use First Grade timber for better quality with fewer defects.
• Second Grade allows more defects but with strict limits.
• Moisture content must be controlled for durability.
• Select timber species based on availability and suitability from Annex A.

flowchart TD
    A[Timber Classification]
    A --> B[First Grade]
    A --> C[Second Grade]
    B -->

IS 6198: Key Formulas, Tables & Specifications for Materials

1. Timber Species Suitable for Doors, Windows & Ventilators (Annex A)

• Imported timber trade names with botanical names and origin:
  • Malaysian (M): Dark Red Meranti (Shorea spp), Kapur (Dryobalanops spp), Merbau (Intsia Palemanica), etc.
  • Papua New Guinea (PNG): Amoora (Ammore eucullata), Cedar Java (Bischofia B Javanica), Light Red Meranti (Shorea spp), etc.
  • Africa (A): Afromosia (Afromosia angolensis), Afara (Terminalia Superba), Utile (Entandophragma utile), etc.

Note: Use the lowest property values among species under a trade name for design.

2. Dimensions & Tolerances of Door Shutter Components (Clause 6.1, Table 3)

• All battens must have uniform width.

3. Marking (Clause 11.1.1)

• Shutters may carry the Standard Mark for identification.

4. Standards Referenced (Annex B)

• IS 401: Preservation of timber
• IS 4141: Seasoning of timber
• IS 4021: Specification for timber frames
• IS 4351: Steel door frames
• IS 12896: Classification of Indian timbers for doors/windows

Summary Diagram: Material Selection & Dimensions

graph TD
A[Imported Timber Species] --> B[Malaysian Species]
A --> C[Papua New Guinea Species]
A --> D[African Species]
E[Door

Designation of Door Shutters (IS 6198: Clause 5.1 & Tables)

Designation format:
[Width in modules] [Type] [Height in modules]

• Width: Number of 100 mm modules in door opening width
• Type:
  • D = Door
  • S = Single shutter
  • T = Double leaf shutter
• Height: Number of 100 mm modules in door opening height

Example:
8 DS 21 = Single shutter door, 8 modules wide (800 mm), 21 modules high (2100 mm approx).

Standard Dimensions of Door Shutters (Table 2)

¹ Combined width of double leaf shutters.

Component Dimensions & Tolerances (Table 3)

*Battens width depends on shutter width and must be uniform.

IS 6198: Dimensions & Sizes of Door Shutters

1. Modular Sizes (Clause 6.2, Table 2)

• Door shutters follow modular dimensions based on 100 mm modules.
• Example designations:
  • 8 DS 20 = 700 mm width × 1905 mm height (single shutter)
  • 12 DT 21 = 1100 mm width (double leaf) × 2005 mm height

Note: Heights in brackets are from finished floor level.

2. Component Dimensions & Tolerances (Clause 6.1, Table 3)

3. General Tolerances (Clause 6.2.1)

• Overall shutter size tolerance: ±3 mm

4. Designation Explanation (Clause 5.1)

• Width = Number of 100 mm modules
• Type: D = Door, S = Single shutter, T = Double leaf shutter
• Height = Number of 100 mm modules

flowchart LR
    A[Door Opening] --> B[Width in Modules (100 mm)]
    A --> C[Height in Modules (100 mm)]
    B --> D{Type}
    D -->|S| E[Single Shutter]
    D -->|T| F[Double Leaf Shutter]
    E & F --> G[Designation

IS 6198: Construction and Workmanship Key Points

1. Tolerances (Clause 6.2.1)

• Door shutter size tolerance: ±3 mm

2. Construction & Workmanship (Clause 7.1.2)

• Woodwork must be neatly finished to exact dimensions.
• Joints must be accurately fitted without wedging or filling.
• Joint principles:
  • Minimize weakening of timber at joints.
  • Abutting surfaces should be perpendicular to transmitted pressure.
  • Surfaces in contact must be accurately formed and fitted.

3. Timber Species (Annex A)

Common imported species suitable for doors/windows include:

Note: Use lowest property values for species under one trade name.

4. Related IS Codes (Annex B)

• IS 4021: Specification for timber door/window frames
• IS 4913: Code for selection, installation & maintenance of timber doors/windows
• IS 2338 (Part 1 & 2): Code for finishing wood materials

Summary Diagram: Joint Construction Principles

flowchart TD
    A[Cut joints to minimize timber weakening] --> B[Arrange fastenings accordingly]
    B --> C[Place abutting surfaces perpendicular to pressure]
    C --> D[Form and fit surfaces accurately]

References: IS 6198 Clauses 6.2.1, 7.1.2, Annex A & B

IS 6198 - Finish Specifications for Timber Door Shutters

Key Points on Finish (Clause 8 reference & related)

• Finish Quality: Must ensure smooth, even surfaces free from defects affecting appearance or durability.
• Surface Preparation: Surfaces should be properly seasoned, dry, and free from dust or grease before finishing.
• Defects Allowed:
  • Checks: max width 0.25 mm, max depth 10 mm.
  • Pitch pockets/streaks: Allowed if clean, filled with putty/filler; on exposed edges, must be cut out and plugged with similar timber.
  • Knots: Limits on size and quantity vary by component (see below).

Tolerances & Defects (Clause 6.1 & 12.5)

• Pitch pockets: Max width 5 mm and length 150 mm per meter (core); 10 mm width and 300 mm length on edges (must be plugged).
• Worm holes: Max 10 mm diameter, max 1 per meter, must be plugged with matching timber.

Recommended Standards for Finishing

• Refer to IS 2338 (Parts 1 & 2) for detailed finishing operations and schedules.
• Preservation per IS 401 (1982).
• Seasoning per IS 4141 (1973).

Summary Diagram: Finish Quality Control on Door Shutter Components

flowchart TD
    A[Start: Timber Door Shutter] --> B[Surface Preparation

IS 6198: Type Tests Summary

Type Tests (Clause 9.1)

Performed per IS 13034:1990 on design changes, including:

• Slamming test
• Shock resistance test
• Edge loading test
• Resistance to buckling test

Sample Size & Acceptance Criteria (Clause 3.1, Table C-4)

• For lots ≤ 25 shutters, sampling is mutually agreed.

Additional Notes

• Minimum 3 samples recommended for type testing (Clause 1.1).
• Tests ensure compliance in sizes, types, construction, workmanship, and finish (Clauses 6.2, 7, 8).

Visual: Type Test Flow

flowchart TD
    A[Design Change] --> B[Select 3+ Samples]
    B --> C[Perform Type Tests per IS 13034]
    C --> D{Pass All Tests?}
    D -- Yes --> E[Approve Design]
    D -- No --> F[Redesign & Retest]

This ensures reliability and conformity of shutter design per IS 6198.

IS 6198: Sampling and Criteria for Conformity (Annex C, Clause 10.1)

Key Table: Sample Size & Permissible Defectives (Table C-4, Clause 3.1)

• Note: For lots ≤ 25 shutters, sampling size is mutually agreed by purchaser and supplier.

Sampling & Inspection Guidelines:

• Samples must be selected separately for each lot.
• Lot conformity is based on the number of defectives in the sample not exceeding the permissible limit.
• Manufacturer must provide free test certificates upon purchaser's request (Clause 9.2).

flowchart TD
    A[Lot Received] --> B[Select Sample Size (Table C-4)]
    B --> C[Inspect Samples]
    C --> D{Defectives ≤ Permissible Limit?}
    D -- Yes --> E[Lot Accepted]
    D -- No --> F[Lot Rejected]
    E --> G[Issue Test Certificate (if requested)]

This ensures quality control through statistically valid sampling, maintaining compliance with IS 6198 requirements.

IS 6198: Marking of Timber Doors & Windows Shutters

Clause 11.1.1: Marking Requirements

• The shutter may be marked with the Standard Mark to indicate conformity to IS 6198.
• The Standard Mark assures compliance with quality, inspection, and testing under BIS supervision.

Key Points on Marking:

• Standard Mark Use: Governed by the Bureau of Indian Standards Act, 1986.
• Purpose: Ensures product quality and conformity.
• License: Manufacturers must obtain BIS license to use the Standard Mark.
• Continuous Surveillance: BIS conducts ongoing checks on Standard Marked products.

Sampling & Defect Criteria for Marking (from Clause 5.1 & Table 4):

• Any shutter failing inspection is defective.
• Lot passes if defectives ≤ permissible number.

Additional Notes:

• Marking should include thickness (t) and shutter type (e.g., splayed or square stile).
• Refer to IS 6198 Annexes and related IS codes (e.g., IS 4021, IS 12896) for timber species and classification.

flowchart TD
    A[Manufacturer Produces Shutter] --> B[Quality Inspection & Testing]
    B --> C{Meets IS 6198 Requirements?}
    C -- Yes --> D[Apply BIS Standard Mark]
    C -- No --> E[Reject / Rework Shutter]
    D --> F[Product Marketed with Standard Mark]
    F --> G[BIS Surveillance & Sampling]
    G --> H{Lot Defectives ≤ Permissible?}
    H -- Yes --> I[Lot Accepted]
    H --

Timber Species Suitable for Door Shutters (IS 6198: Clause 4.1.1 & Annex A)

• Timber for door shutters must comply with IS 12896:1990 classification.
• Ledges, braces, and battens should be of the same species (battens can be different but must be uniform).

Imported Timber Species List (Annex A)

Note: Adopt lowest property values for species under a single trade name.

Key Dimensions for Door Shutter Components (Clause 6.1, Table 3)

Summary

• Use IS 12896:1990 for timber classification.
• Imported timbers are mostly from Malaysia, PNG, and Africa.

IS 6198: List of Referred Indian Standards (Annex B)

Notes:

• These standards cover timber preservation, seasoning, finishing, classification, and testing.
• Refer to IS 12896:1990 for timber species classification suitable for doors/windows.
• IS 2338 parts 1 & 2 detail finishing operations and schedules.
• IS 4913 provides guidance on selection and maintenance of timber doors/windows.
• Use these standards collectively to ensure compliance with IS 6198 requirements.

flowchart LR
    A[IS 6198] --> B[Timber Preservation (IS 401)]
    A --> C[Timber Seasoning (IS 4141)]
    A --> D[Timber Finishing (IS 2338 Parts 1 & 2)]
    A --> E[Door & Window Frames (IS 4021, IS 4351

IS 6198: Sampling and Criteria for Conformity (Annex C, Clause 10.1)

Key Table: Sample Size & Permissible Defectives (Table C-4)

• For lots ≤ 25 shutters, sampling is mutually agreed between purchaser and supplier.
• Manufacturer must provide free test certificates upon purchaser's request (Clause 9.2).

Summary:

• Sampling is based on lot size.
• The number of defective shutters allowed depends on sample size.
• Ensures quality control by limiting defective products in lots.

flowchart TD
    A[Lot Size] --> B[Determine Sample Size]
    B --> C[Inspect Sample]
    C --> D{Defectives ≤ Permissible?}
    D -- Yes --> E[Lot Accepted]
    D -- No --> F[Lot Rejected]

This ensures systematic quality assurance for timber door shutters per IS 6198.