Shallow corrugated asbestos cement sheets

IS 13008: Scope - Key Specifications for Shallow Corrugated Sheets

According to Clause 5.1 and Table 1 of IS 13008, the sheets must conform to the following dimensions and tolerances (all in mm):

• Fig 1 illustrates the sheet profile.
• Fig 2 shows the anvil for thickness measurement.
• Rounding off test results must follow IS 2:1960 rules.

This scope ensures uniformity in manufacturing and quality control of shallow corrugated sheets used in construction.

IS 13008 references several Indian Standards (IS) as essential adjuncts, listed in Annex A (not provided here). Key points include:

• The standard aligns with ISO 393/1-1983 for asbestos cement corrugated sheets and fittings, ensuring international coordination.
• Numerical results in testing must be rounded per IS 2:1960 ("Rules for rounding off numerical values"), maintaining the same significant figures as specified.

Important Referenced Standards (typically in Annex A):

Key Notes:

• Use IS 2:1960 for rounding off test results.
• Refer to ISO 393/1-1983 for international product specifications.
• Annex A lists all Indian Standards necessary for compliance.

For detailed formulas or tables, consult Annex A and the referenced IS codes directly.

IS 13008: Material Composition & Dimensions for Shallow Corrugated Sheets

Material Composition (Clause 4.1)

• Sheets can be natural color or pigmented.
• Pigments must be permanent and comply with relevant Indian Standards.
• Refer IS 5913:1989 for pigment color and staining power guidelines.

Key Dimensions & Tolerances (Clause 5.1, Table 1)

Measurement Notes

• Pitch measurement: Measure total length over six pitches; must be within 6 × pitch ± tolerance.

Visual Reference

• Fig 1: Shallow Corrugated Sheet profile.
• Fig 2: Anvil for thickness measurement.

flowchart LR
    A[Material Composition] --> B[Natural or Pigmented]
    B --> C[Permanent Pigments per IS 5913]
    D[Dimensions] --> E[Depth (20±20 mm)]
    D --> F[Pitch (75±15 mm)]
    D --> G[Width (1015 +10/-5 mm)]
    D --> H[Thickness (4.2 +free/-0.2 mm)]
    D --> I[Length (2000 or 2250 ±10 mm)]

This summary aligns with IS 13008 requirements for shallow corrugated asbestos-cement sheets.

IS 13008 - Colouring Matter in Asbestos Cement Sheets

Key Points from IS 13008:

• Colouring Matter:
  • Pigments used must be permanent in colour.
  • Must conform to relevant Indian Standards.
  • Refer to IS 5913:1989 for guidance on pigment colour and staining power.
  • Pigments should be compatible with asbestos cement and not affect its durability.

Composition (Clause 3.1):

• Asbestos cement sheets are made from:
  • Clean asbestos fibres + suitable other fibres.
  • Cement binder:
    • 33 grade Ordinary Portland Cement (IS 269:1989), or
    • Portland Slag Cement (IS 455:1989), or
    • Portland Pozzolana Cement (IS 1489:1976) (no additional pozzolanic material allowed).
  • Compatible pigments and fillers may be added.

Dimensions & Tolerances (Table 1, Clause 5.1):

Notes:

• Thickness measured using an anvil (see Fig. 2 in IS 13008).
• Rounding off test results per IS 2:1960 rules.

Summary Diagram:

flowchart TD
    A[Asbestos Cement Sheet Composition]
    A --> B[Asbestos Fibres + Other Fibres]
    A --> C[Cement Binder]
    C --> C1[OPC (IS 269)]
    C --> C2[PSC (IS 455)]
    C --> C3[PPC (IS 1489)]
    A --> D[Colouring Matter (Permanent Pigments)]
    D --> E[Must conform to IS 5913]
    A --> F[Fill

IS 13008: Dimensions and Tolerances for Shallow Corrugated Sheets

Key Table (Clause 5.1, Table 1)

Measurement Notes:

• Pitch (P): Measured over six consecutive pitches. The total length over these six pitches must be within ±6 × tolerance (±90 mm) of 6 × 75 mm.
• Thickness (T): Measured using an anvil as per Fig. 2 in the code.

Summary:

• Corrugation depth and pitch have relatively large tolerances due to manufacturing.
• Overall width and length have tighter tolerances to ensure proper fitting.
• Thickness tolerance allows for slight thinning but no thickening beyond nominal.

flowchart LR
  A[Sheet] --> B[Measure Depth (D)]
  A --> C[Measure Pitch (P) over 6 pitches]
  A --> D[Measure Overall Width (B)]
  A --> E[Measure Thickness (T) with Anvil]
  A --> F[Measure Length (A)]

This ensures sheets meet dimensional accuracy for structural and aesthetic requirements.

IS 13008: Physical and Mechanical Properties of Shallow Corrugated Sheets

Key Dimensions & Tolerances (Table 1, Clause 5.1)

Measurement Notes (Clause 5.1.3)

• Pitch (P) is measured over six consecutive corrugations.
• Total length over six pitches must be within 6 × P ± tolerance.

Additional Specifications

• Thickness measured using an anvil (Fig. 2).
• Sheets must conform to dimensional tolerances for proper fit and structural performance.
• Marking with Standard Mark as per Clause 11.2 ensures compliance.

Summary Diagram of Corrugated Sheet Dimensions

graph LR
A[Length, A] --> Sheet[Corrugated Sheet]
Sheet --> Width[B]
Sheet --> Thickness[T]
Sheet --> Corrugation[Corrugation]
Corrugation --> Depth[D]
Corrugation --> Pitch[P]

Use these dimensions and tolerances to verify sheet quality and ensure structural integrity in applications.

IS 13008: Appearance and Finish – Key Specifications

1. Appearance Requirements (Clause 7.1)

• Sheets must be rectangular with smooth weathering surface.
• Good appearance, free from visible defects.
• Corrugations must be true and regular.
• Edges should be straight and clean.

2. Colour and Pigments (Clause 4.1)

• Sheets may be natural colour or pigmented.
• Pigments must be permanent and conform to relevant IS standards.
• Refer IS 5913:1989 for colour and staining power of pigments.

3. Dimensions & Tolerances (Clause 5.1, Table 1)

4. Measurement

• Thickness measured using anvil method (Fig. 2 in IS 13008).

flowchart LR
    A[Finished Sheet] --> B{Appearance}
    B -->|Rectangular| C[Smooth surface]
    B -->|No defects| D[True corrugations]
    B --> E[Straight edges]
    A --> F{Dimensions}
    F --> G[Depth D ±20mm]
    F --> H[Pitch P ±15mm]
    F --> I[Width B +10/-5mm]
    F --> J[Thickness T +Free/-0.2mm]
    F --> K[Length A ±10mm]

This summary ensures compliance with IS 13008 for appearance, finish, and dimensional accuracy of shallow corrugated sheets.

IS 13008: Sampling, Inspection and Acceptance

Key Points from IS 13008 & IS 7639:1975

• Sampling & Inspection: Follow IS 7639:1975 for sampling procedures.
• Inspection Lots: Maximum and minimum lot sizes agreed between manufacturer and purchaser.
• Manufacturer's Certificate: Manufacturer must provide a certificate confirming compliance upon request (Clause 9.2).

Table: Dimensions & Tolerances of Shallow Corrugated Sheets (Clause 5.1)

Inspection & Acceptance Summary

• Sampling: Use IS 7639:1975 for sample size and acceptance criteria.
• Tolerance checks: Verify dimensions against above table.
• Rounding off: Follow IS 2:1960 for rounding test results to significant figures.
• Certificate: Manufacturer to certify compliance on request.

flowchart TD
    A[Order Placed] --> B[Sampling as per IS 7639]
    B --> C[Inspection of Dimensions & Properties]
    C --> D{Within Tolerances?}
    D -- Yes --> E[Acceptance]
    D -- No --> F[Rejection or Rework]
    E --> G[Manufacturer's Certificate]

This ensures quality control and acceptance per IS 13008 standards.

IS 13008: Inspection and Manufacturer's Certificate

1. Inspection (Clause 8.1)

• Sampling and acceptance follow IS 7639:1975.
• Maximum and minimum inspection lots are agreed between manufacturer and purchaser.
• Inspection ensures dimensional and quality compliance.

2. Key Dimensions & Tolerances (Clause 5.1, Table 1)

3. Manufacturer's Certificate (Clause 9.2)

• Manufacturer must provide a certificate confirming compliance with IS 13008.
• Certificate available on purchaser’s request.
• Ensures traceability and quality assurance.

4. Additional Notes

• Sheets may carry the Standard Mark (Clause 11.2).
• Thickness measurement uses an anvil as per Fig. 2.

flowchart TD
    A[Manufacturer produces sheets] --> B[Inspection as per IS 7639]
    B --> C{Dimensions within tolerance?}
    C -- Yes --> D[Certificate issued]
    C -- No --> E[Reject batch]
    D --> F[Sheets dispatched with certificate]

This ensures quality control and compliance with IS 13008 standards.

IS 13008: Testing Facilities and Responsibilities

Key Clauses:

• Clause 9.2: Manufacturer must provide a certificate of compliance on request, confirming finished products meet the standard.
• Clause 10.1: Manufacturer supplies labour and equipment at their own cost for tests conducted on their premises.
• Rounding Off: Test results must be rounded as per IS 2:1960, matching the significant figures of the specified values.

Important Table - Dimensions & Tolerances of Shallow Corrugated Sheets (Clause 5.1):

Notes:

• Thickness measured using anvil method (Fig. 2).
• Manufacturer responsible for test setup and ensuring compliance.
• Certificates ensure traceability and quality assurance.

flowchart LR
    A[Manufacturer] -->|Provides Labour & Equipment| B[Testing at Manufacturer's Premises]
    B --> C[Tests as per IS 13008]
    C --> D{Complies?}
    D -->|Yes| E[Certificate of Compliance]
    D -->|No| F[Rework or Reject]
    E --> G[Purchaser/Representative]

This ensures transparency and adherence to IS 13008 quality requirements.

Marking Requirements (IS 13008 - Clauses 11.1 & 11.2):

Each corrugated sheet must be legibly and indelibly marked with:

• Manufacturer's name or trade-mark
• Year and date of manufacture
• Pictorial warning sign as per IS 12081 (Part 2) 1987
• Optionally, the Standard Mark may also be stamped on each sheet.

Key Dimensions & Tolerances for Shallow Corrugated Sheets (Clause 5.1, Table 1):

Additional Notes:

• Thickness measurement uses the anvil shown in Fig. 2 of IS 13008.
• Dimensions relate to Fig. 1 (Shallow Corrugated Sheets).

flowchart LR
    A[Marking on Sheet] --> B[Manufacturer's Name/Trade-Mark]
    A --> C[Year & Date of Manufacture]
    A --> D[Pictorial Warning (IS 12081)]
    A --> E[Standard Mark (Optional)]

This ensures traceability, safety, and quality compliance as per IS 13008.

IS 13008: Safety Rules Sheet - Key Specifications & Tables

1. Dimensions & Tolerances (Clause 5.1, Table 1)

2. Marking Requirements (Clause 11.1 & 11.2)

• Manufacturer's name or trademark
• Year and date of manufacture
• Pictorial warning sign as per IS 12081 (Part 2) 1987
• Optional: Standard Mark for certification

3. Measurement

• Thickness measured using anvil as shown in Fig. 2 of IS 13008.

Summary Diagram of Sheet Dimensions (Fig. 1)

flowchart LR
    A[Length, A (2000/2250 mm)] --> B[Overall width, B (1015 mm)]
    B --> C[Pitch, P (75 mm)]
    C --> D[Depth, D (20 mm)]
    D --> E[Thickness, T (4.2 mm)]

These ensure uniformity, safety, and traceability of shallow corrugated sheets used in construction.

IS 13008 - List of Indian Standards (Annex A)

This standard references essential Indian Standards (IS) related to asbestos cement products and cement specifications:

Key Notes:

• Safety rules for delivery of asbestos cement sheets are governed by IS 11769 (Part 1): 1987.
• Cement types and their specifications are detailed in IS 269, 455, and 1489.
• Testing and sampling methods for asbestos cement products are standardized under IS 5913 and IS 7639.
• Warning signs and safety precautions for asbestos products are covered in IS 12081 (Part 2).

Summary Diagram of IS 13008 Reference Standards

graph TD
  A[IS 13008] --> B[IS 269: Ordinary Portland Cement]
  A --> C[IS 455: Portland Slag Cement]
  A --> D[IS 1489: Portland-Pozzolana Cement]
  A --> E[IS 5913: Test Methods for Asbestos Cement]
  A --> F[IS 7639: Sampling Methods]
  A --> G[IS 11769 (Part 1): Safety Guidelines]
  A --> H[IS 12081 (Part 2): Warning Signs]

Use these standards as adjuncts while working with asbestos cement products and cement specifications as per IS 13008.

Composition of the Technical Committee (IS 13008 - Annex B)

The Technical Committee for IS 13008 (Cement and Concrete Sectional Committee, CED 2) includes experts from diverse organizations:

Key Points:

• The committee comprises academia, government departments, research institutes, and industry experts.
• Alternates represent most members to ensure continuity.
• The committee ensures comprehensive coverage of cement and concrete technology expertise.

Table: Dimensions & Tolerances of Shallow Corrugated Sheets (Clause 5.1)

Summary Diagram: Committee Composition

graph TD
    A[Chairman: Dr. H.C. Visvesvaraya] --> B[Members]
    B --> C[Industry Experts]
    B --> D[Government Departments]
    B --> E[Research Institutes]
    B --> F[Alternate Members]
    B --> G[Member-Secretary: Central Board of Irrigation and Power]

This composition ensures a balanced and expert-driven standard formulation process for asbestos cement products under IS 13008.