Specification for hold fast

IS 7196: Specification for Hold Fast — Scope Summary

• Scope: Covers dimensions, materials, and marking for mild steel hold fasts used in construction.
• Material: Mild steel as per IS specifications.
• Dimensions: Specified in Fig. 1 of the standard (all in millimeters).
• Marking: Use of BIS Standard Mark governed by BIS Act, 1986 (Clause 6.2).

Key Details:

Typical Hold Fast Dimensions (from Fig. 1):

• Length: ~300 mm
• Width & Thickness: As per steel flat size standards (consult IS 7196 Fig. 1)

Notes:

• Hold fasts are used to anchor doors/windows securely.
• Dimension tolerances and rounding rules apply as per IS 7196.
• For manufacturing and certification, refer to Bureau of Indian Standards guidelines.

flowchart LR
    A[Hold Fast] --> B{Material}
    B --> C[Mild Steel]
    A --> D{Dimensions}
    D --> E[As per Fig. 1]
    A --> F{Marking}
    F --> G[BIS Standard Mark]

For exact dimension tables and drawings, refer to IS 7196 Fig. 1 and related clauses.

IS 7196: Material Requirements for Hold Fast

1. Material Specification

• Mild Steel Flats used for hold fasts must conform to IS 1731-1971.
• Steel should be suitable for structural and general engineering purposes.

2. Size and Dimensions (Clause 3.1)

• Dimensions for hold fasts are standardized as per Fig. 1 in IS 7196.
• All dimensions are in millimeters (mm).
• The steel flat size and dimensions should follow the rules for rounding off numerical values as per IS 7196.

3. Key Specifications Summary

4. Additional Notes

• Mild steel flats must have mechanical and chemical properties as per IS 1731.
• The hold fast design ensures secure anchorage in masonry or concrete.

Illustration of Hold Fast Dimensions (Conceptual)

graph TD
A[Steel Flat] --> B[Length as per Fig. 1]
A --> C[Width as per Fig. 1]
A --> D[Thickness as per IS 1731]

For exact dimensions, refer to Fig. 1 in IS 7196.

Summary: Use mild steel flats conforming to IS 1731, dimensioned per IS 7196 Fig. 1, ensuring compliance with specified sizes and mechanical properties for hold fast applications.

IS 7196: Size and Dimensions of Mild Steel Hold Fast

• Material: Mild steel flats conforming to IS 1731-1971.
• Dimensions: All dimensions are in millimeters (mm).
• Reference Figure: Fig. 1 in IS 7196 shows the detailed size and shape of the hold fast.
• Key Dimensions (Typical values from Fig. 1):
  • Length of flat: L (varies as per design)
  • Width of flat: b (standard mild steel flat widths from IS 1731)
  • Thickness of flat: t (as per IS 1731)
  • Bend radius and hole diameters as per drawing.

Standard Steel Flats Sizes (from IS 1731):

• Rounding Rules: Dimensions are rounded off as per IS 2:1960 for numerical values.
• Marking & Licensing: Use of Standard Mark governed by BIS Act 1986 (Clause 6.2).

Summary Diagram (Conceptual)

graph TD
A[Mild Steel Flat] --> B[Length (L)]
A --> C[Width (b)]
A --> D[Thickness (t)]
A --> E[Bend Radius]
A --> F[Hole Diameter]

Note: For exact dimensions, refer to Fig. 1 of IS 7196 and IS 1731 for flat sizes.

IS 7196 (Specification for Hold Fast) does not explicitly detail manufacturing quality formulas or tables. However, based on standard engineering practice and relevant IS codes, key points for Manufacturing Quality include:

Key Specifications for Manufacturing Quality:

• Material: Mild steel flats must conform to IS 1731-1971.
• Dimensions & Tolerances: As per IS 7196, maintain specified sizes and dimensional tolerances for holdfasts.
• Marking: Use of Standard Mark as per BIS Act, 1986 (Clause 6.2).
• Testing: Holdfasts should undergo mechanical tests (tensile, bend, impact) to ensure quality.
• Surface Finish: Free from defects like cracks, scale, or rust.

General Quality Control Measures:

• Visual inspection for dimensional accuracy.
• Mechanical testing according to IS 1608 (Tensile test for mild steel).
• Hardness and bend tests as per IS 1599 and IS 1609.
• Certification and marking as per BIS guidelines.

Typical Quality Control Table (Example):

flowchart TD
    A[Raw Material: Mild Steel Flats] --> B[Cutting & Shaping]
    B --> C[Dimensional Inspection]
    C --> D[Mechanical Testing]
    D --> E{Pass?}
    E -- Yes --> F[Marking & Packaging]
    E -- No --> G[Rework or Reject]

Summary: Follow IS 1731 for material, IS 1608/1599 for testing, and IS 7196 for dimensions and marking to ensure manufacturing quality of holdfasts.

IS 7196 (1974) does not explicitly provide detailed clauses on Surface Treatment for hold fasts. However, typical practice for hold fasts (mild steel) includes:

Common Surface Treatment Specifications:

• Rust prevention: Hot-dip galvanizing or zinc plating as per IS 4759.
• Painting: Priming with anti-corrosive primers followed by enamel or synthetic enamel paint.
• Cleaning: Surface must be free from oil, grease, and rust before treatment.

Key Points (General Practice):

• Hot-dip galvanizing thickness: Minimum 50 microns as per IS 2629.
• Paint thickness: Primer coat ~25 microns; finishing coat ~40 microns.
• Surface preparation: Abrasive blasting or wire brushing to achieve a clean, roughened surface for better adhesion.

Summary Table:

If you need detailed surface treatment procedures, refer to IS 4759 (Galvanizing) and IS 2074 (Paints for steel structures).

flowchart LR
    A[Hold Fast Steel] --> B[Surface Cleaning]
    B --> C[Surface Treatment]
    C --> D[Hot-dip Galvanizing]
    C --> E[Zinc Plating]
    C --> F[Painting (Primer + Finish)]

This ensures durability and corrosion resistance for hold fasts in construction.

IS 7196 - Marking Specifications (Clause 6)

Key Points:

• Clause 6.1:

  • Each hold fast must be clearly and permanently marked with the manufacturer's name or trademark.

• Clause 6.1.1:

  • The product may also carry the Standard Mark as per BIS regulations.

• Clause 6.2 (Marking License):

  • Use of the Standard Mark is governed by the Bureau of Indian Standards Act, 1986.
  • License conditions for manufacturers to use the Standard Mark can be obtained from BIS.

Summary Table for Marking Requirements

Additional Notes:

• Marking should be durable to withstand handling and environmental exposure.
• For licensing and detailed marking conditions, contact your nearest BIS Regional Office (addresses provided in Clause 6.2).

flowchart LR
    A[Manufacturer] --> B[Mark name/trademark on product]
    B --> C{Apply for Standard Mark License?}
    C -->|Yes| D[BIS Licensing Authority]
    C -->|No| E[Marking complete]
    D --> F[Use Standard Mark on product]
    F --> E

For detailed licensing info, contact the BIS office listed in Clause 6.2.

IS 7196 (1974) - Specification for Hold Fast: Testing & Compliance Summary

Testing & Compliance details are not explicitly covered in the provided clauses. However, general IS code practice and BIS guidelines apply:

Key Points:

• Standard Mark Usage (Clause 6.2):

  • Governed by Bureau of Indian Standards Act, 1986.
  • License required for manufacturers to use the Standard Mark.
  • Compliance ensures product meets IS 7196 specifications.

• Testing:

  • Typically involves mechanical strength, corrosion resistance, and dimensional checks per IS 7196.
  • Tests conducted at BIS approved labs or Central Laboratories listed in the document.

• Contact for Testing & Certification:

  • Central Manak Bhavan, New Delhi or regional BIS offices (e.g., Kolkata, Mumbai, Chennai).
  • Branch offices across India handle compliance verification.

Typical Testing Parameters for Hold Fast (per general hardware standards):

Compliance Flowchart (simplified):

flowchart TD
    A[Manufacturer] --> B[Product Manufacturing]
    B --> C[Testing at BIS Lab]
    C --> D{Pass Tests?}
    D -- Yes --> E[Apply for Standard Mark License]
    D -- No --> F[Modify Product]
    F --> B
    E --> G[License Granted]
    G --> H[Use Standard Mark on Product]

Summary:
For IS 7196 hold fast, testing and compliance revolve around BIS certification, mechanical and corrosion tests, and adherence to dimensional specs. Contact BIS regional offices for detailed procedures and testing.

IS 7196: Installation Guidelines for Hold Fast (Summary)

• Dimensions: Refer to Fig. 1 (IS 7196) for hold fast sizes; all dimensions are in millimeters.
• Material: Mild steel, conforming to specified thickness and length.
• Installation:
  • Embed hold fast vertically into concrete or masonry.
  • Minimum embedment length as per Fig. 1 to ensure adequate anchorage.
  • Ensure the hold fast is plumb and aligned before concrete sets.
• Rounding Off: Use IS 2 rules for rounding numerical values.
• Steel Flats: Dimensions follow IS 2062 for structural steel flats.

Typical Hold Fast Dimensions (Example from Fig.1)

Key Points:

• Embedment depth must be sufficient for load transfer.
• Use corrosion-resistant coatings if exposed.
• Follow IS 2062 for steel flat specifications.

flowchart TD
    A[Prepare Concrete Base] --> B[Position Hold Fast Vertically]
    B --> C[Ensure Alignment & Plumb]
    C --> D[Pour Concrete & Cure]
    D --> E[Check Hold Fast Stability]

For detailed dimensions and installation, consult Fig.1 and Clause 3.1 of IS 7196.

Licensing and Standard Mark Usage (IS 7196 - Clause 6.2)

• Standard Mark Usage is governed by the Bureau of Indian Standards Act, 1986.
• Licence for use of the Standard Mark is granted by BIS under specified conditions.
• Manufacturers must apply to BIS for the licence; details are available from BIS offices.

Key Specifications for Marking (Clause 6.1 & 6.1.1)

• Each product (e.g., hold fast) must be clearly and permanently marked with:
  • Manufacturer's name or trademark.
  • The Standard Mark (optional but recommended).

Contact Points for Licensing & Queries

Summary

• To use the Standard Mark, manufacturers must obtain a licence from BIS.
• Marking must be permanent and legible.
• For licensing procedures, contact the nearest BIS regional office.

flowchart LR
    A[Manufacturer] --> B[Apply for Licence at BIS]
    B --> C{Licence Granted?}
    C -->|Yes| D[Use Standard Mark on Product]
    C -->|No| E[Cannot use Standard Mark]
    D --> F[Mark Product with Manufacturer Name + Standard Mark]

For detailed licensing conditions, consult the Bureau of Indian Standards Act, 1986 and BIS regional offices.