Asbestos Cement Building types and Pipe Fittings, Gutters and Gutter Fittings and Roofing Fittings, Part 3: Roofing Fittings

IS 1626 Part 3: Scope & Key Specifications for Asbestos Cement Roofing Fittings

Scope (Clause 1.2)

Covers various asbestos cement roofing fittings including:

• Serrated adjustable ridges
• Plain wing adjustable ridges
• One piece plain angular ridges
• Unserrated adjustable ridges for hips
• Close fitting adjustable ridges
• Northlight adjustable ridges
• Eaves filler pieces, ridge finials, apron pieces
• Barge boards (including curved), north light/ventilator curves
• Cowl type ventilators, expansion joints (semi-corrugated)
• Louvres (S type), radial exhausts, curved sheets

Key Table: Fittings & Figures (Clause 5.1)

(Refer full table above for all fittings)

Material & Composition (Clause 4)

• Made of inert aggregate: clean asbestos fibers + suitable fibers
• Cement types: Ordinary Portland Cement (IS 269, 8112, 12269), Portland Slag Cement (IS 455), Portland Pozzolana Cement (IS 1489 Part 1 & 2), Rapid Hardening Portland Cement (IS 8041)
• Pozzolanic fillers/pigments allowed if compatible; no addition in PSC/PPC
• Colouring: natural or pigmented (permanent pigments conforming IS 5913)

Tolerances & Dimensions

• Dimensions declared by manufacturer (Clause 5.2)
• Shapes as per Table 1 and associated figures (Clause 5.1)
• Serrations to suit corrugated sheets per IS 459:1992

Summary Diagram: Roofing Fittings Classification

graph TD
    A[Roofing Fittings] --> B[Fully Corr

Key Referenced Indian Standards in IS 1626 Part 3 (1994)

Material Specification Summary

• Cement Types Allowed:

  • Ordinary Portland Cement (IS 269, IS 8112, IS 12269)
  • Portland Slag Cement (IS 455)
  • Portland Pozzolana Cement (IS 1489 Part 1 & 2)
  • Rapid Hardening Portland Cement (IS 8041)

• Note: Pozzolanic materials not allowed with Portland Pozzolana and Slag cements in asbestos cement.

• Pigments: Permanent color pigments conforming to IS 5913:1989.

Fittings Covered (Clause 1.2)

• Serrated, plain wing, angular, unserrated adjustable ridges
• Close fitting and northlight adjustable ridges
• Eaves filler pieces, ridge finials, apron pieces, barge boards
• North light curves, ventilator curves, cowl type ventilators
• Expansion joints for semi-corr

IS 1626 Part 3: Material Composition for Asbestos Cement Roofing Fittings

Material Composition:

• Aggregate: Clean asbestos fiber and suitable other fibers (inert).
• Binder: Ordinary Portland Cement (IS 269:1989 / IS 8112:1989 / IS 12269:1987)
  or
  Portland Slag Cement (IS 455:1989)
  or
  Portland Pozzolana Cement (IS 1489 Part 1 & 2:1991)
  or
  Rapid Hardening Portland Cement (IS 8041:1990).
• Additives: Pozzolanic fillers and pigments compatible with asbestos cement may be added.
  Note: No pozzolanic additions allowed if using Portland Pozzolana or Slag Cement.

Colouring:

• Natural or with added pigments conforming to IS 5913:1989 for permanent colour.
• Surface coatings can be coloured or uncoloured.

Summary Table: Cement Types Allowed

Key Notes:

• Material must ensure durability and compatibility.
• Pigments must be permanent and conform to IS 5913.
• Shapes and tolerances are detailed in Clause 5.1 and Table 1 of IS 1626 Part 3.

flowchart LR
    A[Asbestos Fibres + Other Fibres] --> B[Mixed with Cement]
    B --> C{Cement Type}
    C -->|Ordinary Portland| D[Allowed + Pozzolanic fillers]
    C -->|Portland Slag| E[Allowed - No Pozzolanic fillers]
    C -->|Portland Pozzolana| F[Allowed - No Pozzolanic fillers]
    C -->|Rapid Hardening Portland| G[Allowed + Pozzolanic fillers]
    D & E & F & G --> H[Add Pigments (IS 5913 compliant

IS 1626 Part 3: Colouring Matter for Asbestos Cement Roofing Fittings

Key Points on Colouring Matter (Clause 4):

• Roofing fittings can be left in natural colour or have colouring matter added in the composition.
• Surface coatings may be coloured or uncoloured.
• Pigments used must be of permanent colour and conform to relevant Indian Standards.
• For pigment colour and staining power, refer to IS 5913:1989.
• Pozzolanic fillers and pigments compatible with asbestos cement may be added, but pozzolanic materials are not permitted with Portland pozzolana or Portland slag cement.

Summary Table: Colouring Matter Specifications

Additional Notes on Roofing Fittings (Clause 1.2 & 5.1)

• Various roofing fittings covered (ridges, eaves fillers, ventilators, etc.) with specified codes and figures.
• Shapes, dimensions, and tolerances detailed in Table 1 and corresponding figures (e.g., serrated adjustable ridges - Fig. 1, plain wing adjustable ridge - Fig. 2).
• Serrations to suit corrugated sheets as per IS 459:1992.

flowchart TD
    A[Asbestos Cement Roofing Fittings] --> B[Colouring Matter]
    B --> C[Natural Colour]
    B --> D[Colouring Added in Composition]
    B --> E[Surface Coatings (Coloured/Uncoloured)]
    E --> F[Permanent Pigments (IS 5913:1989)]
    A --> G[Material: OPC or Compatible Cement]
    G --> H[Pozzolanic Fillers Allowed?]
    H --> I[Yes, except with PPC/PSC]

For detailed pigment standards and colour fastness, consult IS 5913:1989.

IS 1626 Part 3: Shape, Dimensions & Tolerances Summary

1. Shapes & Figures (Clause 5.1 & Table 1)

• Various asbestos cement roofing fittings are standardized with specific shapes and figures.
• Examples include:
  • Corrugated serrated adjustable ridges (Code C1, Fig. 1)
  • Plain wing adjustable ridge (C2, Fig. 2)
  • Semi-corrugated serrated adjustable ridge (SC1, Fig. 17)
• Figures 1 to 28 illustrate these fittings for fully and semi-corrugated sheets.
• Serrations conform to IS 459:1992 for sheet profiles.

2. Dimensions & Tolerances

• Length and thickness tolerances ensure proper fit and performance.
• Thickness tolerance is critical for strength and durability.

3. Additional Notes

• Some fittings are supplied in pairs (inner & outer).
• Serrations may be site-cut to fit hips or curves.
• Openings for wired glass in roof lights: 680×400×6 mm or 800×580×6 mm.

Visual Concept: Fitting Types Classification

graph TD
    A[Fittings for Fully Corrugated Sheets] -->|Examples| B(Corrugated serrated adjustable ridges - C1)
    A --> C(Plain wing adjustable ridge - C2)
    A --> D(Corrugated roof light - C8)
    E[Fittings for Semi-Corrugated Sheets] -->|Examples| F(Semi-corrugated serrated adjustable ridge - SC1)
    E --> G(Semi-corrugated roof light - SC5)
    E --> H(Expansion joints - SC7, SC9, SC10)

For detailed dimensions, refer to the specific figures (1 to 28) in IS 1626 Part 3 and IS 459 for sheet profiles.

IS 1626 Part 3 — Physical Requirements Summary

Key Points from Clause 5 (Physical Requirements):

• Clause 5.1:

  • Shapes of asbestos cement roofing fittings must follow Table 1 (fitting types) and corresponding figures (Fig. 1 to Fig. 28).
  • Includes fittings for fully corrugated and semi-corrugated sheets.

• Clause 5.2:

  • Manufacturers must declare dimensions of each fitting.

• Clause 5.3.2:

  • Specifies tolerances on thickness of roofing sheets and fittings (refer Table 5.3.2).

Table 1: Fittings for Corrugated & Semi-Corrugated Sheets (Excerpt)

Note: Serrations conform to IS 459:1992.

Tolerance on Thickness (Typical from IS 1626)

Exact values per Table 5.3.2 in the code.

Summary Diagram: Fitting Types Classification

graph TD
    A[Fittings] --> B[Fully Corrugated Sheets]
    A --> C[Semi-Corrugated Sheets]
    B --> B1[Adjustable Ridges]
    B --> B2[Eaves Filler Pieces]
    B --> B3[Roof Lights & Ventilators]
    C -->

IS 1626 Part 3: General Appearance and Finish of Roofing Fittings

Key Specifications (Clauses 6.3 & 7)

• Surface Finish: Smooth finish suitable for weather exposure; minor surface variations allowed if performance is unaffected.
• Edges: Clean, straight, and regular.
• Compatibility: Fittings must reasonably match the roofing sheets they are intended to fit.

Physical Requirements (Clause 6.1)

• Finished products must be free from visual defects.

Fittings Details (Clause 5.1 & Table 1)

• Fittings are categorized for:
  • Fully Corrugated Sheets (e.g., Corrugated serrated adjustable ridges, plain wing adjustable ridge, corrugated eaves filler piece, etc.)
  • Semi-Corrugated Sheets (e.g., semi-corrugated serrated adjustable ridge, eaves filler piece, ridge finials, expansion joints, etc.)
• Each fitting has a Code No. and Figure No. for reference.
• Serrations conform to IS 459:1992.

Example Table Extract (Fittings for Fully Corrugated Sheets)

Summary Diagram of Appearance Criteria

graph TD
    A[Roofing Fittings] --> B[Surface Finish: Smooth]
    A --> C[Edges: Clean & Straight]
    A --> D[Match Roofing Sheets]
    A --> E[Free from Visual Defects]
    B --> F[Minor Surface Variation Allowed]

Note: Refer to IS 1626 Part 3 figures (1 to 28) for exact shapes and dimensions of fittings. Serrations and profiles must suit IS 459:1992 corrugated sheet standards.

IS 1626 Part 3: Sampling and Number of Tests

1. Sampling (Clause 8.1.1.2 & Table 2)

• The number of fittings selected randomly from a lot depends on the lot size.
• Table 2: Sample Size

2. Number of Tests (Clause 8.2)

• Tests are conducted on the sampled fittings to verify compliance.
• The exact number and type of tests depend on the product specifications and quality requirements.

3. Additional Specifications

• Manufacturer must ensure fittings reasonably match the roofing sheets (Clause 6.3).
• Fittings should have a smooth finish with straight edges and be clean (Clause 7).

Summary

• Sampling size depends on lot size as per Table 2.
• Tests are performed on these samples to ensure quality.
• Surface finish and compatibility with roofing sheets are mandatory.

flowchart TD
    A[Lot Size] --> B{Select Sample Size}
    B -->|Up to 500| C[3 fittings]
    B -->|501 to 1,000| D[5 fittings]
    B -->|1,001 to 1,500| E[7 fittings]
    B -->|1,501 and above| F[10 fittings]
    C --> G[Test fittings]
    D --> G
    E --> G
    F --> G
    G --> H[Verify compliance]

Manufacturer's Certificate - IS 1626 Part 3 Key Points

• Clause 9: Manufacturer must ensure asbestos cement roofing fittings conform to IS 1626 Part 3 requirements and provide a certificate confirming compliance to purchaser/representative.

• Clause 5.2: Manufacturer declares dimensions of fittings as per specified figures and tables.

• Clause 8.1.1.2: Visual inspection for defects and impermeability is mandatory.

Key Specifications & Tables

• Refer Table 1 (Clause 5.1 & 10.1) for full list of fittings, code numbers, and figures.

• Shapes must conform to figures (e.g., Fig. 1 to Fig. 28) as per IS 1626 Part 3.

Tolerances (Clause 5.1)

• Thickness tolerances apply as per Table 5.3.2 (not fully provided here).

Summary Diagram: Manufacturer's Quality Assurance Process

flowchart TD
    A[Manufacturing of Fittings] --> B[Dimension Declaration (Clause 5.2)]
    B --> C[Visual & Impermeability Inspection (Clause 8.1.1.2)]
    C --> D[Conformance Check to IS 1626 Part 3]
    D --> E[Issue Manufacturer's Certificate (Clause 9)]
    E --> F[Delivery to Purchaser]

Note: Manufacturer's certificate confirms fittings meet dimensional, visual, and physical standards per IS 1626 Part 3, ensuring quality and compliance.

IS 1626 Part 3: Marking and Certification Key Points

Clause 10.1: Mandatory Marking on Each Item

Each asbestos cement roofing fitting shall be marked with:

• Manufacturer's identification
• Code No. as per Table 1 (see summary below)
• Date of manufacture
• Pictorial warning signs per IS 12081 (Part 2):1987

Table 1: Code Numbers for Fittings (Excerpt)

Note: Full table in Clause 5.1.

Clause 10.2: BIS Certification Mark

• Use of the Standard Mark is governed by the BIS Act, 1986.
• Manufacturers must obtain a license from BIS for using the Standard Mark.

Clause 11: Safety Rules Sheet

• All deliveries must include a safety rules sheet per IS 11769 (Part 1):1987.

Summary Diagram of Marking Process

flowchart TD
    A[Manufacture of Fitting] --> B[Marking]
    B --> C[Manufacturer ID]
    B --> D[Code No. (Table 1)]
    B --> E[Date of Manufacture]
    B --> F[Pictorial Warning (IS 12081 Part 2)]
    B --> G[Apply BIS Standard Mark (if licensed)]
    G --> H[Delivery with Safety Rules Sheet (IS 11769 Part 1)]

References:

• IS 12081 (Part 2): Pictorial warning signs for asbestos
• IS 11769 (Part 1): Safety guidelines for asbestos cement products
• Table

IS 1626 (Part 3) - Safety Rules Sheet Summary

• Safety Rules Sheet: As per Clause 11, every delivery of asbestos cement roofing fittings must include a safety rules sheet following IS 11769 (Part 1):1987. This provides guidelines for safe handling and use of asbestos cement products.

• Marking Requirements (Clause 10.1): Each fitting must be marked with:

  • Manufacturer's identification
  • Code No. (see Table 1 for fittings codes)
  • Date of manufacture
  • Pictorial warning signs as per IS 12081 (Part 2):1987

• Table 1 (Clause 5.1): Lists standard fittings with their code numbers and figure references for both fully corrugated and semi-corrugated sheets (e.g., C1 for Corrugated serrated adjustable ridges).

• Key References:

  • IS 11769 (Part 1): Safe use of asbestos cement products
  • IS 12081 (Part 2): Pictorial warning signs for asbestos products
  • IS 459: Corrugated and semi-corrugated asbestos cement sheets (for serration profiles)

Example Marking Format

Summary Diagram of Safety & Marking Flow

flowchart TD
    A[Manufacture of Fittings] --> B[Mark fittings with required info]
    B --> C[Attach Safety Rules Sheet (IS 11769 Part 1)]
    C --> D[Delivery to Customer]
    D --> E[Safe Handling & Use per Safety Sheet]

Note: The safety rules sheet is critical for health protection due to asbestos hazards. Always follow IS 11769 (Part 1) for detailed safety practices.

List of Referred Indian Standards in IS 1626 (Part 3):1994

Key Notes:

• Cement types used in asbestos cement roofing fittings include Ordinary Portland Cement (IS 269, IS 8112, IS 12269), Portland Slag Cement (IS 455), Portland Pozzolana Cement (IS 1489 Parts 1 & 2), and Rapid Hardening Portland Cement (IS 8041).
• Safety and testing guidelines refer to IS 11769 (Part 1) and IS 5913.
• Pigments used for coloring must conform to relevant standards (see IS 5913).

Summary Diagram: Referenced Standards Categories

graph TD
    A[IS 1626 Part 3: Roofing Fittings] --> B[Cement Standards]
    A --> C[Asbestos Product Safety]
    A --> D[Testing Methods]
    B

IS 1626 Part 3 — Committee Composition Summary

Committee Composition (Annex B, Foreword) details the members of the Cement and Concrete Sectional Committee, CED 2, responsible for this standard. Key points:

• Chairman: Dr. H.C. Visvesvaraya, University of Roorkee
• Members: Representatives from diverse organizations including:
  • Cement manufacturers (e.g., Orissa Cement Ltd, The India Cements Ltd)
  • Research institutions (e.g., CSIR Structural Engineering Research Centre)
  • Government departments (e.g., Central Public Works Department, Geological Survey of India)
  • Industry bodies (e.g., Builder's Association of India, Gammon India Ltd)
  • BIS officials (ex-officio members)
• Alternate members are designated for most representatives.

No specific formulas or tables govern committee composition; it is a list of experts ensuring broad technical and industrial representation.

Additional Notes:

• The committee ensures standard development aligns with industry, research, and regulatory needs.
• For licensing and certification, refer to Clause 10.2.1 and BIS Act provisions.
• Safety sheets for asbestos cement roofing fittings follow IS 11769 (Part 1):1987.

graph TD
A[Committee Composition] --> B[Chairman: H.C. Visvesvaraya]
A --> C[Members from Cement Industry]
A --> D[Research Institutes]
A --> E[Government Departments]
A --> F[Industry Bodies]
A --> G[BIS Officials]

For detailed member names and affiliations, refer to Annex B of IS 1626 Part 3:1994.