Fire-check Doors, Part I: Plate, Metal Covered and Rolling Type

IS 3614 Part 1 - Scope Overview

• Scope Definition:
  IS 3614 Part 1 (1966) primarily defines terms and sets the framework for the standard related to structural elements (e.g., prestressed concrete components). It aligns with international practices while addressing Indian field conditions.

• Key Points:

  • Applies to design, materials, and workmanship for prestressed concrete.
  • Covers definitions essential for understanding subsequent parts of the standard.
  • Ensures compatibility with global standards and local practices.

• No specific formulas or tables are provided in the Scope clause itself. These appear in later clauses/parts.

Typical Related Content in IS 3614 (for reference):

Summary Diagram:

flowchart TD
    A[IS 3614 Part 1] --> B[Definitions & Scope]
    B --> C[Design Principles]
    B --> D[Materials Specifications]
    B --> E[Workmanship & Testing]

For detailed formulas and tables, refer to subsequent clauses or parts of IS 3614.

IS 3614 Part 1: Fire-Check Doors - Key Specifications

The standard covers steel plate, metal-covered, and rolling type fire-check doors designed to restrict fire spread through openings.

Types of Fire-Check Doors:

• Steel Plate Doors: Made of steel plates with fire-resisting core.
• Metal Covered Doors: Doors with a non-combustible core covered by metal sheets.
• Rolling Type Doors: Rolling shutters with fire-resistant materials.

Key Specifications:

• Materials: Steel or metal sheets with fire-resistant cores.
• Fire Resistance: Doors must withstand fire for a specified duration (typically 1 to 4 hours).
• Construction Details: Include thickness of steel plates, core materials, and sealing mechanisms.

Typical Construction Parameters (based on general practice):

Important:

• Doors must be fitted with intumescent seals to prevent smoke and fire penetration.
• Hinges and locking devices must be fire-resistant.
• Dimensions and installation should ensure tight closure.

flowchart TD
    A[Fire-Check Doors] --> B[Steel Plate Doors]
    A --> C[Metal Covered Doors]
    A --> D[Rolling Type Doors]
    B --> E[Steel Thickness: 1.6-3.0 mm]
    C --> F[Steel Thickness: 0.8-1.6 mm]
    D --> G[Steel Thickness: 1.2-2.0 mm]
    E --> H[Fire Resistance: 1-4 hours]
    F --> I[Fire Resistance: 1-3 hours]
    G --> J[Fire Resistance: 1-2 hours]

For detailed design and testing methods, refer to the full IS 3614 Part 1 document.

IS 3614 Part 1 - Materials Key Points

1. Mild Steel Plates & Sections (Clause 5.1)

• Must conform to Grade St 32.0 of IS:1977-1962 (Specification for structural steel, ordinary quality).
• Used in fire-check doors construction.

2. Protection of Brackets (Clause 2.3.3)

• Ends of brackets shall be protected by brickwork or concrete.
• Minimum thickness: 115 mm.

3. Fittings (Clause 6.1.3)

• Bolt-straps, clips, sockets, latches, hinges, pivots, etc.:
  • Shall be bolted or riveted through the door.
  • Or bolted/welded/riveted to the frame.
  • Exceptions only if purchaser specifies.

Additional Notes:

• Mild steel Grade St 32.0 typically has:
  • Yield Strength: ~ 230 MPa
  • Tensile Strength: ~ 410 MPa
• Welding and riveting should follow IS codes such as IS 3614 Part I and IS procedures for manual metal arc welding.

Summary Table

flowchart TD
    A[Mild Steel Plates] -->|Conform to| B[IS:1977 Grade St 32.0]
    C[Bracket Ends] -->|Protected by| D[Brick/Concrete ≥115 mm]
    E[Fittings] -->|Attached by| F[Bolts/Rivets/Welding]
    F -->|To| G[Door or Frame]

For detailed mechanical properties and welding procedures, refer to IS:1977 and IS:3614 Part I.

IS 3614 (Part 1) - 1966: Construction Requirements Key Points

• Bracket Protection:
  Clause 2.3.3 specifies that the end of brackets must be protected by brickwork or concrete with a minimum thickness of 115 mm.

• Material Specifications:

  • Use standard bricks or concrete as per IS codes for protective covering.
  • Ensure adequate bonding and curing for durability.

• General Construction Practices:

  • Follow good workmanship practices to avoid damage during installation.
  • Ensure proper alignment and secure fixing of brackets before protection.

Summary Table: Bracket End Protection

Additional Notes:

• Protection prevents corrosion and mechanical damage.
• Thickness ensures structural integrity and fire resistance.

flowchart LR
    A[Bracket End] --> B[Protective Layer]
    B --> C{Material}
    C -->|Brickwork| D[Thickness ≥ 115 mm]
    C -->|Concrete| D

For detailed design and workmanship, refer to IS 3614 Part 1 and related IS codes on masonry and concrete.

IS 3614 Part 1 - Fittings and Hardware: Key Specifications

1. Dimensions & Thickness (Clause 6.1.4.5)

2. Fixing Requirements (Clauses 6.1.3 & 6.2.10)

• All fittings (bolt-straps, clips, sockets, latches, catches, hinges, pivots) must be:
  • Bolted or riveted through the door
  • Bolted, welded, or riveted to the frame
• Exceptions only if purchaser specifies otherwise.

3. Bolts, Nuts, Washers (Clause 6.3.11.4)

• All bolts must have adequate nuts and washers.
• Washers for channel guide fixing must fit slotted holes.
• Lead washers are mandatory for channel guide fixings.

Summary Diagram of Fixing Method

graph LR
A[Fittings] --> B[Bolted through door]
A --> C[Riveted through door]
A --> D[Bolted/Welded/Riveted to frame]

Use these minimum thickness and fixing methods to ensure compliance with IS 3614 Part 1 for door fittings and hardware.

IS 3614 (Part 1) - Rolling Steel Shutters: Key Specifications and Formulas

Size Limits (Clause 4.2)

• Max area: 5 m²
• Max width: 2.4 m
• Max height: 2.10 m
  (Size measured between reveal faces and floor to barrel underside)

Design Considerations (Clause 6.3)

• Shutter size must suit doorway dimensions within above limits.
• Structural strength to resist wind loads and operational stresses.
• Barrel diameter and shaft design per shutter size and weight.

Typical Parameters (from IS 3614 Part 1 & engineering practice)

General Formula for Barrel Diameter (approximate)

[ d = \sqrt{\frac{16 M}{\pi \tau}} ]

• M = bending moment due to shutter weight and wind load
• τ = allowable shear stress of barrel material

flowchart LR
A[Doorway Size] --> B[Check Limits: ≤2.4m width, ≤2.10m height, ≤5m² area]
B --> C[Select Shutter Size]
C --> D[Calculate Load: Weight + Wind]
D --> E[Design Barrel & Shaft Diameter]
E --> F[Manufacture & Installation]

Summary:
IS 3614 Part 1 limits rolling shutter size to 5 m² area, max 2.4 m width, 2.10 m height. Design involves load calculations (wind + weight) and sizing barrel/shaft accordingly. Use IS 875 for wind loads and standard mechanical formulas for shaft design.

IS 3614 (Part 1) - 1966: Installation Requirements Summary

• Opening Heads: Must be constructed using brickwork or concrete.
• Projecting Heads (per Clause A-1.2.2):
  • Thickness: Minimum 130 mm concrete cavity.
  • Support: Must rest on projecting jambs.
  • Extent: Should extend across the full width and projection of the jambs.

Key Specifications:

Notes:

• The projecting heads provide structural integrity and distribute loads over openings.
• Ensure proper curing and alignment during installation.

graph LR
A[Opening Head] --> B[Brickwork or Concrete]
B --> C[Minimum 130 mm thickness for projecting heads]
C --> D[Rest on projecting jambs]
D --> E[Extend full width and projection of jambs]

For detailed installation procedures, refer to the full IS 3614 Part 1 document.

IS 3614 Part 1: Surface Treatment and Painting for Doors

Key Specifications (Clause 6.2.8)

• Pre-fabrication:
  • Apply 1 coat of red oxide, red lead, or graphite paint before leaving the works.
• Post-erection:
  • Apply 2 coats of oil paint immediately after erection.

Purpose

• Red oxide/red lead/graphite paint acts as a primer, providing corrosion resistance.
• Oil paint coats provide final protection and aesthetic finish.

Typical Paint Thickness Recommendations (General Practice)

Notes:

• Surface must be clean, dry, and free from rust before painting.
• For metal-covered and rolling types, the same painting sequence applies.
• Ensure adequate drying time between coats as per manufacturer's guidelines.

flowchart LR
    A[Fabrication] --> B[Apply 1 coat Primer (Red oxide/Red lead/Graphite)]
    B --> C[Transport & Erection]
    C --> D[Apply 2 coats Oil Paint]
    D --> E[Final Door Surface Protection]

This ensures durability and corrosion protection per IS 3614 Part 1.

IS 3614 Part 1: Marking and Certification Key Points

• Clause 7.1.1: Fire-check doors and shutters may bear the ISI Certification Mark.
• The ISI mark ensures compliance with the standard via:
  • Inspection
  • Testing
  • Quality control during production
• The mark is governed by the Indian Standards Institution (Certification Marks) Act.
• Continuous market surveillance by ISI ensures conformity.
• Manufacturers must obtain a license from ISI to use the mark.

Summary Table: Marking & Certification

Installation Note (Appendix A, Clause 2.3.3)

• Bracket ends must be protected by brickwork or concrete ≥ 115 mm thick for fire-check door installation.

flowchart LR
    A[Manufacturer] --> B[Apply ISI Mark License]
    B --> C[Production with QC & Testing]
    C --> D[Fire-check Door/Shutter]
    D --> E[Market Surveillance by ISI]
    E --> F[Continuous Compliance Assurance]

For detailed licensing conditions, contact the Indian Standards Institution (BIS) regional office.

IS 3614 Part 1: Installation Guidance Key Points

Guide Installation (Clause 2.3.1, Appendix A-2.3.1)

• Guide Positioning:

  • Set back as far as possible inside the jamb chase.
  • Fit close to the front side of the chase.
  • Fully contained within the chase; no projection beyond jamb face (excluding jamb lining).

• Fixing Bolts:

  • Use 10 mm bolts through jamb thickness or rag/expanding bolts grouted securely.
  • Provide:
    • 1 bolt within 150 mm of barrel enclosure.
    • 1 bolt within 150 mm of floor opening.
    • Additional bolts spaced ≤ 600 mm apart between these points.

• Bolt Holes in Guides:

  • Slotted holes approx. 50 mm length (except top-most fixing).
  • Slots allow downward expansion.
  • Lead and iron washers shaped to fit slotted holes.

Summary Table for Fixings

This ensures secure, adjustable fixing of guides to accommodate thermal or structural movements without stress.

flowchart LR
    Barrel[Barrel Enclosure]
    Floor[Floor Opening]
    Guide[Guide in Chase]
    Barrel -->|Bolt ≤150mm| Guide
    Floor -->|Bolt ≤150mm| Guide
    Guide -->|Intermediate bolts ≤600mm| Guide
    Guide -->|Top bolt (circular hole)| Guide

For detailed design, refer to IS 3614 Part 1 (1966) Appendix A.